CN113500200A - Surface modification method for gold nanorod water-phase-oil-phase conversion by using seed growth method - Google Patents
Surface modification method for gold nanorod water-phase-oil-phase conversion by using seed growth method Download PDFInfo
- Publication number
- CN113500200A CN113500200A CN202110706346.3A CN202110706346A CN113500200A CN 113500200 A CN113500200 A CN 113500200A CN 202110706346 A CN202110706346 A CN 202110706346A CN 113500200 A CN113500200 A CN 113500200A
- Authority
- CN
- China
- Prior art keywords
- solution
- gold
- gold nanorods
- water
- oil phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Nanotechnology (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The invention provides a surface modification method for gold nanorods by using a seed growth method to convert water into oil, wherein the gold nanorods are stable gold nanorods with hexadecyl trimethyl ammonium bromide bilayers. The surface modification of the water phase-oil phase is firstly modified in an intermediate solution, then secondarily modified in a target solution, and finally dispersed in the target solution. The method comprises the following steps: (1) preparing gold nanorods with stable hexadecyl trimethyl ammonium bromide bilayers; (2) dissolving the gold nanorod solution in an intermediate solution through centrifugation, and modifying polystyrene on the surface of the gold nanorod; (3) and transferring the gold nanorods partially modified by the polystyrene into a target oil phase for secondary modification through centrifugation to obtain the gold nanorods fully modified by the polystyrene. The method has the advantages of simple operation, high efficiency and short time consumption. The gold nanorods obtained by the method have good dispersibility and stability in the oil phase.
Description
Technical Field
The invention belongs to the field of modification of noble metal nanoparticles, and particularly relates to a modification method for replacing Cetyl Trimethyl Ammonium Bromide (CTAB) on the surface of a gold nanorod by Polystyrene (Polystyrene) through ligand exchange, transferring the gold nanorod from a water phase to an oil phase and stably dispersing the gold nanorod in the oil phase.
Background
Gold nanorods have longitudinal and transverse plasmon resonance effects and possess a range of shape-related properties, such as absorption, photoluminescence, surface-enhanced raman cross-section and electrical conductivity. These characteristics determine that the discrete gold nanorods have high potential application values in the aspects of optical and electronic devices, sensing and imaging, biological diagnosis, drug and gene delivery and the like. The gold nanorods assembled into an ordered array by self-assembly or auxiliary assembly can realize the overall characteristics generated by the coupling of the optical and electronic characteristics of adjacent single nanoparticles, and provide a new way for manufacturing new materials and functional devices. To date, significant progress has been made in self-assembly of gold nanorod arrays, such as stabilizing gold nanorods with ligands chemically or physically bound to the gold nanorods, assembling the gold nanorods with DNA, carbon nanotubes, block copolymer templates or external electric fields, etc., but most of these methods are limited by control of overall geometry and complexity, and generally speaking, to obtain different nanorod self-assembled structures, the surface chemistry must be changed by replacing or modifying ligands.
There are two methods for ligand modification of nanoparticle surfaces: surface initiated polymerization (Grafting from) and ligand displacement (Grafting to). The surface initiation polymerization method is that initiation points of polymerization reaction are formed on the surface of nano particles, and then monomer polymerization reaction is initiated on the surface; the ligand replacement method is to replace the original ligand serving as the stabilizer on the surface of the nanoparticle with the polymer ligand which is treated by the end group and has interaction with the nanoparticle. Compared with a surface initiation polymerization method, the ligand replacement method is simple to operate, the distribution of the ligand on the surface of the nano particles is more uniform, and the surface property of the nano particles can be accurately regulated.
At present, gold nanorods with different length-diameter ratios and CTAB protection can be prepared by adopting a gold seed growth method, the method is simple to operate, high in repeatability and strong in practicability, and the two ends and the side surfaces of the gold nanorods prepared by the gold seed growth method have different binding capacities for ligand molecules, so that the step-by-step modification of PS (polystyrene) by the gold nanorods is possible. However, the gold nanorods prepared by the method are water-soluble and insoluble in oil-soluble solvents such as tetrahydrofuran, toluene and the like, thereby greatly limiting the practical application of the gold nanorods. Furthermore, the gold nanorods protected by CTAB disclosed in the documents and patents so far are difficult to modify or can only partially modify PS, and thus, the effect of full-surface coating is not achieved, so that the gold nanorods are difficult to maintain good dispersibility in an oily solvent, and the storage and further use of the gold nanorods in the oily solvent are limited to some extent.
Disclosure of Invention
The first purpose of the invention is to overcome the defects of the prior art, and a two-step modification method is adopted to modify PS on the surface of the gold nanorod.
The second purpose of the invention is to transfer the gold nanorods from the water phase to the oil phase by the proposed modification method, and to have better dispersibility in the oil phase.
The method for modifying the PS on the surface of the gold nanorod comprises the following steps:
(1) centrifuging the gold nanorod with the stable CTAB bilayer for 2 times, and dripping the intermediate solution dissolved with the PS into the gold nanorod solution under the ultrasonic condition.
(2) The intermediate solution with dissolved PS and gold nanorods was stirred at room temperature for 12 h.
(3) And (4) centrifuging, and transferring the partially modified gold nanorods to a target solution dissolved with PS for secondary modification.
(4) And stirring the target solution dissolved with the PS and the partially modified gold nanorods for 12 hours at room temperature.
(5) Centrifugation was performed to remove the free PS supernatant.
(6) And dispersing the modified gold nanorods into a target solution.
The gold nanorods are prepared by a CTAB seed growth method, and the preparation process mainly comprises three steps of preparation of a gold seed solution, preparation of a growth solution and growth of gold seeds.
Firstly, the preparation method of the gold seed solution of the invention is as follows: 0.8mL of 0.01M (mol/L) fresh ice NaBH4The solution was rapidly injected into 5mL of 0.5mM HAuCl4Stirring the solution and 5mL of 0.2M CTAB mixed solution at 1200rpm for 2min to change the color of the solution from yellow to brown yellow, and standing for 2-4h to obtain a CTAB coated gold seed solution;
further, the preparation method of the growth solution of the present invention is as follows: 9.0g CTAB and 1.234g NaOL were dissolved in 250mL 50 deg.C deionized water, and 12mL 4mM AgNO was added as the solution was cooled to 30 deg.C3Solution, 15min later 250mL of 1mM HAuCl was added4The solution was stirred at 700rpm for 90min, and 1.25mL of 0.064M ascorbic acid was added thereto and stirred for 30s to obtain a growth solution.
Further, the process of growing the gold seed according to the present invention is as follows: adding 0.4mL of gold seed solution into the growth solution, stirring for 30s, standing at 30 ℃ for 12h, and centrifuging at 7000rpm for 30min to obtain gold nanorods.
The gold nanorods comprise gold nanorods with different length-diameter ratios.
The gold nanorod is centrifuged for 2 times, so that part of CTAB on the surface of the gold nanorod is removed, and PS can be in contact with the surface of the gold nanorod.
The intermediate solution is N, N-Dimethylformamide (DMF) solution.
The PS is PS-SH with a mercapto group modified at the tail end, and the concentration of the PS-SH is 2.8mM-8 mM.
The quantity ratio of the gold nanorods to the PS substances is 1: 0.56 x 107-1.6×107。
The room temperature of the invention is 15-40 ℃.
The invention can use PS-SH to replace CTAB as ligand exchange.
The target solution for the transfer according to the invention is a tetrahydrofuran solution (THF).
The purpose of secondary modification is to modify the unmodified area of the gold nanorod again, so that PS is comprehensively modified on the surface of the gold nanorod.
The grafting density of PS on the surface of the gold nanorod is 2.9chains/nm2。
Compared with the prior art, the method has the advantages that the gold nanorods can be used for comprehensively modifying PS through the method, so that the gold nanorods can stably exist in THF, and the gold nanorods can be conveniently stored and further used in an oil phase.
Drawings
FIG. 1 is a transmission electron microscope image of gold nanorods in a preferred embodiment of the modification method for transferring PS coating on the surface of the gold nanorods from a water phase to an oil phase through two-step modification.
FIG. 2 is a transmission electron microscope image of the PS modified gold nanorods in a preferred example of the modification method for transferring PS coated gold nanorods surface from water phase to oil phase through two-step modification.
FIG. 3 is a diagram of a gold nanorod visible light-near infrared absorption spectrum of a preferred embodiment of a modification method for transferring PS coating on the surface of gold nanorods from a water phase to an oil phase through two-step modification.
FIG. 4 is a diagram showing the visible light-near infrared absorption spectrum of the PS-modified gold nanorods in a preferred example of the modification method for transferring PS-coated gold nanorods from the water phase to the oil phase through two-step modification.
Note that: for simplicity, M is mol/liter (mol/L) and mM is millimole/liter (mmol/L)
Detailed Description
The present invention is described in further detail below with reference to specific examples and with reference to the data. It will be understood that these examples are intended to illustrate the invention and are not intended to limit the scope of the invention in any way.
In order to make the objects, technical solutions and advantages of the present invention more clearly and completely understood, the technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings and the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
Example 1:
0.8mL of 0.01M fresh ice NaBH4The solution was rapidly injected into 5mL of 0.5mM HAuCl4And 5mL of 0.2M CTAB mixed solution, stirring at 1200rpm for 2min to change the color of the solution from yellow to brown, and standing for 2-4h to obtain CTAB coated gold seeds.
9.0g CTAB and 1.234g NaOL were dissolved in 250mL 50 deg.C deionized water, and 12mL 4mM AgNO was added as the solution was cooled to 30 deg.C3Solution, 15min later 250mL of 1mM HAuCl was added4The solution was stirred at 700rpm for 90min, and 1.25mL of 0.064M ascorbic acid was added thereto and stirred for 30s to obtain a growth solution.
Adding 0.4mL of seed solution into the growth solution, stirring for 30s, standing at 30 ℃ for 12h, and centrifuging at 7000rpm for 30min to obtain the gold nanorods.
And (3) dropwise adding a small amount of sample on a copper net, naturally drying, observing the morphology of the gold nanorods by using a transmission electron microscope, wherein the result is shown in figure 1, the long diameter of the gold nanorods is measured to be 63.4 +/-4.8 nm, the short diameter of the gold nanorods is measured to be 16.4 +/-2.2 nm, and the length-diameter ratio is calculated to be 3.82 +/-0.60 nm.
And a small amount of sample is taken to detect the absorption spectrum of the gold nanorod in the wavelength range of 400-1000nm by using an ultraviolet-visible spectrophotometer. As shown in FIG. 3, the gold nanorods had a transverse SPR of 509nm and a longitudinal SPR of 776 nm.
Example 2:
0.8mL of 0.01M fresh ice NaBH4The solution was rapidly injected into 5mL of 0.5mM HAuCl4And 5mL of 0.2M CTAB mixed solution, stirring at 1200rpm for 2min to change the color of the solution from yellow to brown, and standing for 2-4h to obtain CTAB coated gold seed solution.
9.0g CTAB and 1.234g NaOL were dissolved in 250mL 50 deg.C deionized water, and 12mL 4mM AgNO was added as the solution was cooled to 30 deg.C3The solution is prepared by mixing a solvent and a solvent,after 15min 250mL of 1mM HAuCl were added4The solution was stirred at 700rpm for 90min, and 1.25mL of 0.064M ascorbic acid was added and stirred for 30 s. A growth solution is obtained.
Adding 0.4mL of seed solution into the growth solution, stirring for 30s, standing at 30 ℃ for 12h, and centrifuging at 7000rpm for 30min to obtain the gold nanorods.
Centrifuging the gold nanorod solution once, removing redundant CTAB, and dripping the DMF solution of PS-SH into the gold nanorod solution under ultrasound, wherein the ratio of the gold nanorod to the PS-SH substance is 1: 0.56 × 107-1.6×107. The resulting mixed solution of gold nanorods and PS was stirred at room temperature for 12 hours. Then, the gold nanorods were centrifuged once, transferred to a THF solution containing PS-SH, and stirred at room temperature for 12 hours to perform secondary modification. Centrifuging for many times to remove supernatant containing free PS-SH, and dispersing into THF to obtain THF solution of gold nanorods with high-density PS modified on the surface.
A small amount of sample is dripped on a copper net, the appearance of the gold nanorod is observed by using a transmission electron microscope after natural air drying, the result is shown in figure 2, the long diameter of the gold nanorod is measured to be 63.4 +/-4.8 nm, the short diameter is measured to be 16.4 +/-2.2 nm, the length-diameter ratio is calculated to be 3.82 +/-0.60, and the figure proves that the modified gold nanorod has better dispersibility.
And a small amount of sample is taken to detect the absorption spectrum of the gold nanorod in the wavelength range of 400-1000nm by using an ultraviolet-visible spectrophotometer. As shown in FIG. 4, the transverse SPR of the gold nanorods dissolved in THF was 551nm, the longitudinal SPR was 811nm, and the peak shape of the absorption spectrum of the gold nanorods was better, indicating that the gold nanorods had better dispersibility.
Claims (10)
1. A surface modification method for gold nanorod water-phase-oil-phase conversion obtained by a seed growth method is characterized by comprising the following steps:
(1) centrifuging a gold nanorod with a stable CTAB bilayer for 2 times, and dripping a medium solution dissolved with PS into the gold nanorod solution under ultrasound;
(2) stirring the intermediate solution dissolved with the PS and the gold nanorods for 12 hours at room temperature;
(3) centrifuging, transferring the partially modified gold nanorods to a target solution dissolved with PS for secondary modification;
(4) stirring the target solution dissolved with the PS and the partially modified gold nanorods for 12 hours at room temperature;
(5) centrifuging to remove the free PS supernatant;
(6) and dispersing the modified gold nanorods into a target solution.
2. The method for modifying the surface of gold nanorods by water-to-oil phase conversion obtained by seed growth method according to claim 1, wherein: the gold nanorods are prepared by a CTAB seed growth method, and the preparation process comprises the preparation of a gold seed solution, the preparation of a growth solution and the growth of gold seeds;
the preparation method of the gold seed solution comprises the following steps: 0.8mL of 0.01M (mol/L) fresh ice NaBH4The solution was rapidly injected into 5mL of 0.5mM HAuCl4Stirring the solution and 5mL of 0.2M CTAB mixed solution at 1200rpm for 2min to change the color of the solution from yellow to brown yellow, and standing for 2-4h to obtain a CTAB coated gold seed solution;
the preparation method of the growth solution comprises the following steps: 9.0g CTAB and 1.234g NaOL were dissolved in 250mL 50 deg.C deionized water, and 12mL 4mM AgNO was added as the solution was cooled to 30 deg.C3Solution, 15min later 250mL of 1mM HAuCl was added4Stirring the solution at 700rpm for 90min, adding 1.25mL of 0.064M ascorbic acid, and stirring for 30s to obtain a growth solution;
the preparation method for the growth of the gold seeds comprises the following steps: adding 0.4mL of gold seed solution into the growth solution, stirring for 30s, standing at 30 ℃ for 12h, and centrifuging at 7000rpm for 30min to obtain gold nanorods.
3. The method for modifying the surface of gold nanorods by water-to-oil phase conversion obtained by seed growth method according to claim 1 or 2, characterized in that: the gold nanorods comprise gold nanorods with different length-diameter ratios.
4. The method for modifying the surface of gold nanorods by water-to-oil phase conversion obtained by seed growth method according to claim 1, wherein: the intermediate solution is N, N-dimethylformamide DMF solution.
5. The method for modifying the surface of gold nanorods by water-to-oil phase conversion obtained by seed growth method according to claim 1, wherein: PS is PS-SH with a terminal modified sulfhydryl group, and the concentration of the PS-SH is 2.8mM-8 mM.
6. The method for modifying the surface of gold nanorods by water-to-oil phase conversion obtained by seed growth method according to claim 3, wherein: the ratio of the amount of the gold nanorods to the amount of the PS substances is 1: 0.56X 107-1.6×107。
7. The method for modifying the surface of gold nanorods by water-to-oil phase conversion obtained by seed growth method according to claim 5, wherein: PS-SH was substituted for CTAB as ligand exchange.
8. The method for modifying the surface of gold nanorods by water-to-oil phase conversion obtained by seed growth method according to claim 1, wherein: the target solution for transfer was tetrahydrofuran solution THF.
9. The method for modifying the surface of gold nanorods by water-to-oil phase conversion obtained by seed growth method according to claim 1, wherein: the grafting density of PS on the surface of the gold nanorod is 2.9chains/nm2。
10. The method for modifying the surface of gold nanorods by water-to-oil phase conversion obtained by seed growth method according to claim 1, wherein: the room temperature is 15-40 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110706346.3A CN113500200B (en) | 2021-06-24 | 2021-06-24 | Surface modification method for gold nanorod water-phase-oil-phase conversion by using seed growth method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110706346.3A CN113500200B (en) | 2021-06-24 | 2021-06-24 | Surface modification method for gold nanorod water-phase-oil-phase conversion by using seed growth method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113500200A true CN113500200A (en) | 2021-10-15 |
| CN113500200B CN113500200B (en) | 2022-05-17 |
Family
ID=78010471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110706346.3A Active CN113500200B (en) | 2021-06-24 | 2021-06-24 | Surface modification method for gold nanorod water-phase-oil-phase conversion by using seed growth method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113500200B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090149426A1 (en) * | 2007-03-01 | 2009-06-11 | Medical Tool & Technology, Llc | Process for synthesizing silver-silica particles and applications |
| CN103496666A (en) * | 2013-09-09 | 2014-01-08 | 中国科学院化学研究所 | Method for phase transferring and three-dimensional assembling of precious metal nano-particles |
| CN104209533A (en) * | 2014-07-21 | 2014-12-17 | 苏州大学 | Method for rapidly preparing gold nanorod |
| CN104259453A (en) * | 2014-10-16 | 2015-01-07 | 江南大学 | Gold nanorod dimer asymmetric modification method with biocompatibility |
| JP2017095744A (en) * | 2015-11-19 | 2017-06-01 | 大日本塗料株式会社 | Composition for detecting test substance containing gold nanorod and usage thereof |
| CN107189072A (en) * | 2016-06-02 | 2017-09-22 | 中国科学院化学研究所 | Janus rod-like nano materials and preparation method thereof |
| CN109239051A (en) * | 2018-09-29 | 2019-01-18 | 东南大学 | Transferable type surface-enhanced Raman detection substrate of a kind of flexibility and its preparation method and application |
| CN109776843A (en) * | 2019-01-24 | 2019-05-21 | 华中科技大学 | A kind of double ligand Janus nanoparticles and the preparation method and application thereof |
| CN110586949A (en) * | 2019-10-23 | 2019-12-20 | 四川大学 | Gold nanorod modification method and DNA-modified gold nanorod |
| CN112756622A (en) * | 2020-12-29 | 2021-05-07 | 杭州电子科技大学 | Preparation method of gold nanorod material under low surfactant concentration |
| CN112828284A (en) * | 2020-12-30 | 2021-05-25 | 杭州电子科技大学 | Preparation method of mesoporous silica-coated gold nanorod surface-grown silver composite material |
-
2021
- 2021-06-24 CN CN202110706346.3A patent/CN113500200B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090149426A1 (en) * | 2007-03-01 | 2009-06-11 | Medical Tool & Technology, Llc | Process for synthesizing silver-silica particles and applications |
| CN103496666A (en) * | 2013-09-09 | 2014-01-08 | 中国科学院化学研究所 | Method for phase transferring and three-dimensional assembling of precious metal nano-particles |
| CN104209533A (en) * | 2014-07-21 | 2014-12-17 | 苏州大学 | Method for rapidly preparing gold nanorod |
| CN104259453A (en) * | 2014-10-16 | 2015-01-07 | 江南大学 | Gold nanorod dimer asymmetric modification method with biocompatibility |
| JP2017095744A (en) * | 2015-11-19 | 2017-06-01 | 大日本塗料株式会社 | Composition for detecting test substance containing gold nanorod and usage thereof |
| CN107189072A (en) * | 2016-06-02 | 2017-09-22 | 中国科学院化学研究所 | Janus rod-like nano materials and preparation method thereof |
| CN109239051A (en) * | 2018-09-29 | 2019-01-18 | 东南大学 | Transferable type surface-enhanced Raman detection substrate of a kind of flexibility and its preparation method and application |
| CN109776843A (en) * | 2019-01-24 | 2019-05-21 | 华中科技大学 | A kind of double ligand Janus nanoparticles and the preparation method and application thereof |
| CN110586949A (en) * | 2019-10-23 | 2019-12-20 | 四川大学 | Gold nanorod modification method and DNA-modified gold nanorod |
| CN112756622A (en) * | 2020-12-29 | 2021-05-07 | 杭州电子科技大学 | Preparation method of gold nanorod material under low surfactant concentration |
| CN112828284A (en) * | 2020-12-30 | 2021-05-25 | 杭州电子科技大学 | Preparation method of mesoporous silica-coated gold nanorod surface-grown silver composite material |
Non-Patent Citations (2)
| Title |
|---|
| 刘标: "金纳米棒的表面选区修饰", 《中国优秀硕士学位论文全文数据库(电子科技) 工程科技I辑》 * |
| 李炜坤: "超分子聚合物/无机纳米粒子有序组装体的结构与性能", 《中国优秀博士学位论文全文数据库(电子期刊)工程科技I辑》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113500200B (en) | 2022-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Sarathy et al. | Thiol-derivatized nanocrystalline arrays of gold, silver, and platinum | |
| Leibowitz et al. | Structures and properties of nanoparticle thin films formed via a one-step exchange− cross-linking− precipitation route | |
| Tang et al. | Poly (N-vinyl-2-pyrrolidone)(PVP)-capped dendritic gold nanoparticles by a one-step hydrothermal route and their high SERS effect | |
| Chen et al. | Arenethiolate monolayer-protected gold clusters | |
| Liu et al. | Synthesis and characterization of gold/Polypyrrole Core− Shell Nanocomposites and elemental gold nanoparticles based on the gold-containing Nanocomplexes prepared by electrochemical methods in aqueous solutions | |
| Yee et al. | Alkyl selenide-and alkyl thiolate-functionalized gold nanoparticles: Chain packing and bond nature | |
| Lu et al. | Controlled fabrication of gold-coated 3D ordered colloidal crystal films and their application in surface-enhanced Raman spectroscopy | |
| Imahori et al. | Photoactive Three-Dimensional Monolayers: Porphyrin− Alkanethiolate-Stabilized Gold Clusters | |
| Yin et al. | Electrochemical synthesis of silver nanoparticles under protection of poly (N-vinylpyrrolidone) | |
| Kobayashi et al. | Deposition of silver nanoparticles on silica spheres by pretreatment steps in electroless plating | |
| Yan et al. | Thiol-stabilized atomically precise, superatomic silver nanoparticles for catalysing cycloisomerization of alkynyl amines | |
| Qu et al. | Shape/size-controlled syntheses of metal nanoparticles for site-selective modification of carbon nanotubes | |
| Lee et al. | Voltammetry and electron-transfer dynamics in a molecular melt of a 1.2 nm metal quantum dot | |
| Maye et al. | Heating-induced evolution of thiolate-encapsulated gold nanoparticles: a strategy for size and shape manipulations | |
| Bharathi et al. | Direct synthesis and characterization of gold and other noble metal nanodispersions in sol− gel-derived organically modified silicates | |
| Fu et al. | Shape-selective preparation and properties of oxalate-stabilized Pt colloid | |
| Crane et al. | Synthesis of copper–silica core–shell nanostructures with sharp and stable localized surface plasmon resonance | |
| Liu et al. | In situ plasmonic counter for polymerization of chains of gold nanorods in solution | |
| Abdelmoti et al. | Potential-controlled electrochemical seed-mediated growth of gold nanorods directly on electrode surfaces | |
| JP2003515438A (en) | Hydroxylamine seeding of metal colloid nanoparticles | |
| Chen et al. | Heating or cooling: temperature effects on the synthesis of atomically precise gold nanoclusters | |
| Wang et al. | Dumbbell-Like Silica Coated Gold Nanorods and Their Plasmonic Properties | |
| Yu et al. | Morphologies and surface plasmon resonance properties of monodisperse bumpy gold nanoparticles | |
| Jain et al. | Self-assembled nanogaps via seed-mediated growth of end-to-end linked gold nanorods | |
| Liu et al. | Capping modes in PVP-directed silver nanocrystal growth: multi-twinned nanorods versus single-crystalline nano-hexapods |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |