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Kwon YB, Cho S, Min DH, Kim YK. Bio-inspired interfacial chemistry for the fabrication of a robust and functional graphene oxide composite film. RSC Adv 2024; 14:7676-7683. [PMID: 38444977 PMCID: PMC10913078 DOI: 10.1039/d3ra08932k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 02/20/2024] [Indexed: 03/07/2024] Open
Abstract
A strong and functional artificial nacre film is developed by using polyethyleneimine-functionalized GO (PEI-GO) and pyrogallol (PG) inspired by insect exoskeleton sclerotization. PEI-GO is macroscopically assembled into the laminated films and then reacted with PG under the optimized condition for their efficient cross-linking through Schiff-base reactions. The internal structure and physicochemical properties of PG-treated PEI-GO (PG@PEI-GO) films are systematically explored with various analytical tools. The optimized PG@PEI-GO films exhibit excellent tensile strength, modulus, and toughness of 216.0 ± 12.9 MPa, 17.0 ± 1.1 GPa, and 2192 ± 538.5 kJ m-3 which are 2.7, 2.8, and 2.3-fold higher than those of GO films, respectively. Furthermore, silver nanoparticles (AgNPs) are densely immobilized on the PG@PEI-GO films harnessing their abundant amine groups, and the AgNPs immobilized PG@PEI-GO films exhibit a high catalytic activity in the conversion of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) with maintaining structural integrity. Based on the results, we demonstrate that the rational design of interfaces, inspired by natural materials, is an efficient approach to achieving strong and functional GO laminated composite films.
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Affiliation(s)
- Yoo-Bin Kwon
- Department of Chemistry, Seoul National University Seoul 08826 Republic of Korea
| | - Seongwon Cho
- Department of Chemistry, Dongguk University 30 Pildong-ro, Jung-gu Seoul 04620 Republic of Korea
| | - Dal-Hee Min
- Department of Chemistry, Seoul National University Seoul 08826 Republic of Korea
| | - Young-Kwan Kim
- Department of Chemistry, Dongguk University 30 Pildong-ro, Jung-gu Seoul 04620 Republic of Korea
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2
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Malakhovsky P, Minakov E, Rashkevich A, Artemyev M. Effect of Surface Curvature on Colloidal Stability of Silver Nanoparticles with Monomolecular and Mixed Thiol Ligand Layers in the Presence of Alkali Cations. Chemphyschem 2022; 23:e202200564. [PMID: 35972025 DOI: 10.1002/cphc.202200564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Indexed: 01/05/2023]
Abstract
Colloidal stability of silver nanoparticles is the critical parameter while designing colloidal colorimetric biosensors. Here, we examined colloidal stability of 11-mercaptoundecanoate-capped quasi-spherical silver nanoparticles and silver nanoplates in 0.02 M phosphate buffers with pH 8.0 containing Li+ , Na+ , K+ , or Cs+ cations. While quasi-spherical nanoparticles demonstrate a good colloidal stability in the presence of all studied cations, nanoplates aggregate in the presence of Na-phosphate buffer. The mechanism of aggregation consists in the ion-specific nanoparticle-cation bridging interaction, which is sensitive to the nanoparticle surface curvature. Increased apparent dissociation constant of carboxyl groups on the zero-curvature nanoplates' surface enhances bridging interactions and makes nanoplates colloidally unstable. Bridging interactions can be eliminated by using mixed bimolecular 11-mercaptoundecanoate-11-mercaptoundecanol surface ligand layer. Silver nanoplates with mixed ligand layer show an enhanced colloidal stability at a standard carbodiimide bioconjugation protocol.
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Affiliation(s)
- Pavel Malakhovsky
- Research Institute for Physical Chemical Problems of the, Belarusian State University, Leningradskaya Str. 14, Minsk, 220006, Belarus
| | - Egor Minakov
- Belarusian State University, Leningradskaya Str. 14, Minsk, 220006, Belarus
| | - Alexey Rashkevich
- Belarusian State University, Leningradskaya Str. 14, Minsk, 220006, Belarus
| | - Mikhail Artemyev
- Research Institute for Physical Chemical Problems of the, Belarusian State University, Leningradskaya Str. 14, Minsk, 220006, Belarus
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3
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Malakhovsky P, Murausky D, Guzatov D, Gaponenko S, Artemyev M. Determination of pseudo-refractive index in self-assembled ligand layers from spectral shift of surface plasmon resonances in colloidal silver nanoplates. Z PHYS CHEM 2021. [DOI: 10.1515/zpch-2020-1786] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Abstract
We examined systematically how self-assembled monolayers (SAMs) of different mercaptoacids affect the spectral shift of the localized surface plasmon resonance in silver nanoplates and nanospheres. We observed a clear trend in the magnitude of a redshift with a molecular length or the SAM thickness within a homologous series of aliphatic mercaptoacids: the thicker shell the stronger the red shift. Using classic Mie theory for plasmonic core-dielectric shell spheres and oblate spheroids we developed the method for determination of a pseudo-refractive index in SAM of different molecules and obtained a good correlation with the reference refractive indices for bulk long-chain aliphatic acids, but only in case of silver nanoplates. Calculations for silver core–shell nanospheres gave overestimated values of refractive index perhaps due to restrictions of Mie theory on the minimum particle size.
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Affiliation(s)
- Pavel Malakhovsky
- Research Institute for Physical Chemical Problems of the Belarusian State University , Leningradskaya str. 14 , 220006 , Minsk , Belarus
| | - Dmitry Murausky
- Research Institute for Physical Chemical Problems of the Belarusian State University , Leningradskaya str. 14 , 220006 , Minsk , Belarus
| | - Dmitry Guzatov
- Yanka Kupala State University of Grodno , Ozheshko str. 22 , 230023 , Grodno , Belarus
| | - Sergey Gaponenko
- B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus , Nezavisimosti Ave. 68-2 , 220072 , Minsk , Belarus
| | - Mikhail Artemyev
- Research Institute for Physical Chemical Problems of the Belarusian State University , Leningradskaya str. 14 , 220006 , Minsk , Belarus
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4
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Hybridization between cellulose nanofibrils and faceted silver nanoparticles used with surface enhanced Raman scattering for trace dye detection. Int J Biol Macromol 2020; 143:85-92. [DOI: 10.1016/j.ijbiomac.2019.12.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 10/28/2019] [Accepted: 12/02/2019] [Indexed: 12/14/2022]
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5
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Controlled Synthesis of Triangular Silver Nanoplates by Gelatin–Chitosan Mixture and the Influence of Their Shape on Antibacterial Activity. Processes (Basel) 2019. [DOI: 10.3390/pr7120873] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Triangular silver nanoplates were prepared by using the seeding growth approach with the presence of citrate-stabilized silver seeds and a mixture of gelatin–chitosan as the protecting agent. By understanding the critical role of reaction components, the synthesis process was improved to prepare the triangular nanoplates with high yield and efficiency. Different morphologies of silver nanostructures, such as triangular nanoplates, hexagonal nanoprisms, or nanodisks, can be obtained by changing experimental parameters, including precursor AgNO3 volume, gelatin–chitosan concentration ratios, and the pH conditions. The edge lengths of triangular silver nanoplates were successfully controlled, primarily through the addition of silver nitrate under appropriate condition. As-prepared triangular silver nanoplates were characterized by transmission electron microscopy (TEM), dynamic light scattering (DLS), UV-Vis, Fourier transform infrared spectroscopy (FT-IR), and X-Ray diffraction (XRD). Silver nanoplates had an average edge length of 65–80 nm depending on experimental conditions and exhibited a surface plasma resonance absorbance peak at 340, 450, and 700 nm. The specific interactions of gelatin and chitosan with triangular AgNPs were demonstrated by FT-IR. Based on the characterization, the growth mechanism of triangular silver nanoplates was theoretically proposed regarding the twinned crystal of the initial nanoparticle seeds and the crystal face-blocking role of the gelatin–chitosan mixture. Moreover, the antibacterial activity of triangular silver nanoplates was considerably improved in comparison with that of spherical shape when tested against Gram-positive and Gram-negative bacteria species, with 6.0 ug/mL of triangular silver nanoplates as the MBC (Minimum bactericidal concentration) for Escherichia coli and Vibrio cholera, and 8.0 ug/mL as the MBC for Staphylococcus aureus and Pseudomonas aeruginosa. The MIC (Minimum inhibitory concentration) of triangular Ag nanoplates was 4.0 ug/mL for E. coli, V. cholera, S. aureus, and P. aeruginosa.
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6
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Unconventional Physical Methods for Synthesis of Metal and Non-metal Nanoparticles: A Review. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES INDIA SECTION A-PHYSICAL SCIENCES 2018. [DOI: 10.1007/s40010-017-0474-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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7
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Kim YK, Ok G, Choi SW, Jang H, Min DH. The interfacing structural effect of Ag/graphene oxide nanohybrid films on surface enhanced Raman scattering. NANOSCALE 2017; 9:5872-5878. [PMID: 28430273 DOI: 10.1039/c7nr00308k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The interfacing structural effect of Ag/graphene oxide (GO) nanohybrid films on SERS was investigated by using Ag nanostructures immobilized on polyallylamine hydrochloride (PAA) functionalized-GO and reduced GO (RGO) films. We found that the electron transfer from Ag nanostructures to GO derivatives dominantly occurred at the interfaces between Ag nanostructures and the sp2 carbon domains of GO and RGO films. By utilizing 4-aminothiophenol (4-ATP) as a Raman probe, it was revealed that this electron transfer process augmented the enhancement factor (EF) of 4-ATP up to ∼1.8 fold on Ag/PAA-RGO nanohybrid films compared to Ag/PAA-GO nanohybrid films with the increasing interfacing area between Ag nanostructures and the sp2 carbon domains of GO derivatives through wet-chemical processes.
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Affiliation(s)
- Young-Kwan Kim
- Carbon Composite Materials Research Center, Institute of Advanced Composite Materials, San 101, Eunha-ri, Bongdong-eup, Wanju-gun, Jeollabuk-do 565-905, Korea.
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8
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Chiu CW, Lee YC, Ou GB, Cheng CC. Controllable 3D Hot-Junctions of Silver Nanoparticles Stabilized by Amphiphilic Tri-block Copolymer/Graphene Oxide Hybrid Surfactants for Use as Surface-Enhanced Raman Scattering Substrates. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.6b03504] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Chih-Wei Chiu
- Department
of Materials Science and Engineering, and ‡Graduate Institute of Applied Science
and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Yen-Chen Lee
- Department
of Materials Science and Engineering, and ‡Graduate Institute of Applied Science
and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Gang-Bo Ou
- Department
of Materials Science and Engineering, and ‡Graduate Institute of Applied Science
and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Chih-Chia Cheng
- Department
of Materials Science and Engineering, and ‡Graduate Institute of Applied Science
and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
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9
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10
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Qiu L, Wang W, Zhang A, Zhang N, Lemma T, Ge H, Toppari JJ, Hytönen VP, Wang J. Core-Shell Nanorod Columnar Array Combined with Gold Nanoplate-Nanosphere Assemblies Enable Powerful In Situ SERS Detection of Bacteria. ACS APPLIED MATERIALS & INTERFACES 2016; 8:24394-24403. [PMID: 27574829 DOI: 10.1021/acsami.6b06674] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Development of a label-free ultrasensitive nanosensor for detection of bacteria is presented. Sensitive assay for Gram-positive bacteria was achieved via electrostatic attraction-guided plasmonic bifacial superstructure/bacteria/columnar array assembled in one step. Dynamic optical hotspots were formed in the hybridized nanoassembly under wet-dry critical state amplifying efficiently the weak vibrational modes of three representative food-borne Gram-positive bacteria, that is, Staphylococcus xylosus, Listeria monocytogenes, and Enterococcus faecium. These three bacteria with highly analogous Raman spectra can be effectively differentiated through droplet wet-dry critical SERS approach combined with 3D PCA statistical analysis so that highly sensitive discrimination of bacterial species and samples containing mixtures of bacteria can be achieved.
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Affiliation(s)
- Li Qiu
- Institute of Intelligent Machines, HeFei Institutes of Physical Science, Chinese Academy of Sciences , Hefei, Anhui 230031, People's Republic of China
| | - WeiQiang Wang
- Institute of Health Sciences and School of Life Science, AnHui University , Hefei, Anhui 230601, People's Republic of China
| | - AiWen Zhang
- Institute of Intelligent Machines, HeFei Institutes of Physical Science, Chinese Academy of Sciences , Hefei, Anhui 230031, People's Republic of China
| | - NanNan Zhang
- Institute of Health Sciences and School of Life Science, AnHui University , Hefei, Anhui 230601, People's Republic of China
| | - Tibebe Lemma
- Department of Physics, Nanoscience Center, University of Jyväskylä , P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - HongHua Ge
- Institute of Health Sciences and School of Life Science, AnHui University , Hefei, Anhui 230601, People's Republic of China
| | - J Jussi Toppari
- Department of Physics, Nanoscience Center, University of Jyväskylä , P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - Vesa P Hytönen
- BioMediTech, University of Tampere and Fimlab Laboratories , FI-33520 Tampere, Finland
| | - Jin Wang
- Institute of Intelligent Machines, HeFei Institutes of Physical Science, Chinese Academy of Sciences , Hefei, Anhui 230031, People's Republic of China
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11
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Roebuck K, Tremblay A. The self-assembly of twinned boehmite nanosheets into porous 3D structures in ethanol–water mixtures. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.01.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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12
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Shen Y, He T, Wang W, Zhan Y, Hu X, Yuan B, Zhou X. Fluorescence enhancement on silver nanoplates at the single- and sub-nanoparticle level. NANOSCALE 2015; 7:20132-41. [PMID: 26567844 DOI: 10.1039/c5nr06146f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The fluorescence intensity of a fluorescent molecule can be strongly enhanced when the molecule is near a metal nanoparticle. Hence, fluorescence enhancement has a lot of applications in the fields of biology and medical science. It is necessary to understand the mechanism for such an attractive effect, if we intend to develop better materials to improve the enhancement. In this paper, we directly image the diverse patterns of fluorescence enhancement on single Ag nanoplates by super-resolution microscopy. The research reveals that the edges or tips of the Ag nanoplate usually show a much higher ability of fluorescence enhancement than the mid part. The spatial distribution of fluorescence enhancement strongly depends on the size of the Ag nanoplate as well as the angle between the Ag nanoplate and the incident light. The experimental results above are essentially consistent with the simulated electric field by the theory of localized surface plasmon resonance (LSPR), but some irregularities still exist. We also find that fluorescence enhancement on small Ag nanoplates is mainly due to in-plane dipole plasmon resonance, while the enhancement on large Ag nanoplates is mainly due to in-plane quadrupole plasmon resonance. Furthermore, in-plane quadrupole resonance of large plates has a higher ability to enhance the fluorescence signal than the in-plane dipole plasmon resonance. This research provides many valuable insights into the fluorescence enhancement at the single- and sub-nanoparticle level, and will be very helpful in developing better relevant materials.
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Affiliation(s)
- Yangbin Shen
- Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215125, China.
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13
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Luo Y, Ma L, Zhang X, Liang A, Jiang Z. SERS Detection of Dopamine Using Label-Free Acridine Red as Molecular Probe in Reduced Graphene Oxide/Silver Nanotriangle Sol Substrate. NANOSCALE RESEARCH LETTERS 2015; 10:937. [PMID: 26055475 PMCID: PMC4457732 DOI: 10.1186/s11671-015-0937-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2015] [Accepted: 05/15/2015] [Indexed: 05/06/2023]
Abstract
The reduced graphene oxide/silver nanotriangle (rGO/AgNT) composite sol was prepared by the reduction of silver ions with sodium borohydride in the presence of H2O2 and sodium citrate. In the nanosol substrate, the molecular probe of acridine red (AR) exhibited a weak surface-enhanced Raman scattering (SERS) peak at 1506 cm(-1) due to its interaction with the rGO of rGO/AgNT. Upon addition of dopamine (DA), the competitive adsorption between DA and AR with the rGO took place, and the AR molecules were adsorbed on the AgNT aggregates with a strong SERS peak at 1506 cm(-1) that caused the SERS peak increase. The increased SERS intensity is linear to the DA concentration in the range of 2.5-500 μmol/L. This new analytical system was investigated by SERS, fluorescence, absorption, transmission electron microscope (TEM), and scanning electron microscope (SEM) techniques, and a SERS quantitative analysis method for DA was established, using AR as a label-free molecular probe.
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Affiliation(s)
- Yanghe Luo
- />Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin, 541004 China
- />Hezhou University, Hezhou, 542899 China
| | - Lu Ma
- />Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin, 541004 China
- />Hezhou University, Hezhou, 542899 China
| | - Xinghui Zhang
- />Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin, 541004 China
| | - Aihui Liang
- />Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin, 541004 China
| | - Zhiliang Jiang
- />Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin, 541004 China
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14
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Chiu CW, Lin PH. Hierarchical self-assembly of random mica nanosheet-stabilized silver nanoparticles into flower microstructures for highly sensitive SERS substrates. RSC Adv 2015. [DOI: 10.1039/c5ra16872d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The use of self-assembled novel flower-like microstructures as SERS substrates allowed high-efficiency detection of adenine molecules from DNA.
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Affiliation(s)
- Chih-Wei Chiu
- Department of Materials Science and Engineering
- National Taiwan University of Science and Technology
- Taipei 10607
- Taiwan
| | - Po-Hsien Lin
- Department of Materials Science and Engineering
- National Taiwan University of Science and Technology
- Taipei 10607
- Taiwan
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15
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Ionic liquids–water interfacial preparation of triangular Ag nanoplates and their shape-dependent antibacterial activity. J Colloid Interface Sci 2015; 437:35-41. [DOI: 10.1016/j.jcis.2014.09.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 08/31/2014] [Accepted: 09/02/2014] [Indexed: 11/21/2022]
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16
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Xia XD, Wang TL, Yuan XY. Tuning plasmon absorption of unmodified silver nanoplates for sensitive and selective detection of copper ions by introduction of ascorbate. CHINESE CHEM LETT 2014. [DOI: 10.1016/j.cclet.2014.05.033] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Tan T, Tian C, Ren Z, Yang J, Chen Y, Sun L, Li Z, Wu A, Yin J, Fu H. LSPR-dependent SERS performance of silver nanoplates with highly stable and broad tunable LSPRs prepared through an improved seed-mediated strategy. Phys Chem Chem Phys 2014; 15:21034-42. [PMID: 24223426 DOI: 10.1039/c3cp52236a] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The application of the silver plates as a proper substrate for surface enhanced Raman spectroscopy (SERS) was performed to give deep insight on LSPR-dependent SERS performance. Firstly, an improved seed-mediated method is developed to synthesize silver nanoplates (NP) with broad-tuning localized surface plasmon resonance (LSPR) and high stability. The LSPR peaks could be tuned in the range from 485 to ∼1200 nm by controlling the experimental parameters. With the treatment of sodium dodecyl sulfate (SDS), silver NPs exhibit high stability for SERS tests. The LSPR-dependent SERS study was performed by taking four typical silver NPs with LSPR peaks at 485 nm, 614 nm, 906 nm and 1130 nm as substrates. Also, two probe molecules, 4-amino-thiophenol (4-ATP) and rhodamine-6G (R-6G), were used, and both the 458 nm and 633 nm lasers were selected as excitation for the LSPR-dependent SERS study. Our results indicated that the SERS performance is largely dependent on the LSPR of the silver NP substrate at a given excitation wavelength. Specifically, the Raman signals were greatly enhanced when the laser excitation line matched (close to the LSPR band) the peak position of LSPR band. When at the excitation of 633 nm, two orders of magnitude stronger SERS signals would be observed for the Ag-614 substrate than that of the Ag-485 and Ag-1130 substrates with their LSPR peak positions far away from 633 nm. The same result can also be observed when the laser excitation at 458 nm was selected for the Ag-485 substrate. Our study gives a deep insight into LSPR-dependent SERS performance. It also gives a method for giving large SERS enhancement just by selecting a proper excitation wavelength matched to the LSPR of the substrate.
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Affiliation(s)
- Taixing Tan
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P. R. China.
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18
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Abstract
SERS labels are a new class of nanotags for optical detection based on Raman scattering. Central advantages include their spectral multiplexing capacity due to the small line width of vibrational Raman bands, quantification based on spectral intensities, high photostability, minimization of autofluorescence from biological specimens via red to near-infrared (NIR) excitation, and the need for only a single laser excitation line. Current concepts for the rational design and synthesis of SERS labels are summarized in this review. Chemical constituents of SERS labels are the plasmonically active metal colloids for signal enhancement upon resonant laser excitation, organic Raman reporter molecules for adsorption onto the metal surface for identification, and an optional protective shell. Different chemical approaches towards the synthesis of rationally designed SERS labels are highlighted, including also their subsequent bioconjugation.
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Affiliation(s)
- Yuling Wang
- Physical Chemistry, Faculty of Chemistry, University of Duisburg-Essen, Universitätsstr. 5, D-45141 Essen, Germany
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19
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Zhang Y, Sun S, Zhang X, Tang L, Song X, Yang Z. Sulfate-ion-assisted galvanic replacement tuning of silver dendrites to highly branched chains for effective SERS. Phys Chem Chem Phys 2014; 16:18918-25. [DOI: 10.1039/c4cp02525c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Foreign sulfate ions were utilized to tune silver dendrites to highly branched chains for effective SERS through a galvanic replacement.
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Affiliation(s)
- Yunxia Zhang
- School of Science
- State Key Laboratory for Mechanical Behavior of Materials
- MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- Xi'an Jiaotong University
| | - Shaodong Sun
- School of Science
- State Key Laboratory for Mechanical Behavior of Materials
- MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- Xi'an Jiaotong University
| | - Xiaozhe Zhang
- School of Science
- State Key Laboratory for Mechanical Behavior of Materials
- MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- Xi'an Jiaotong University
| | - Linli Tang
- School of Science
- State Key Laboratory for Mechanical Behavior of Materials
- MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- Xi'an Jiaotong University
| | - Xiaoping Song
- School of Science
- State Key Laboratory for Mechanical Behavior of Materials
- MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- Xi'an Jiaotong University
| | - Zhimao Yang
- School of Science
- State Key Laboratory for Mechanical Behavior of Materials
- MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- Xi'an Jiaotong University
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20
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Chen X, Jiang C, Yu S. Nanostructured materials for applications in surface-enhanced Raman scattering. CrystEngComm 2014. [DOI: 10.1039/c4ce01383b] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This highlight summarizes current advances in the design and the employment of nanostructured materials in SERS substrates especially from the dimensional point of view. We then talk about synthesis methods and the novel properties of these nanostructured materials with their potential applications in SERS.
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Affiliation(s)
- Xiaochun Chen
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Controllable Chemical Reaction & Material Chemical Engineering
- Hefei, China
| | - Changlong Jiang
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei, China
| | - Shaoming Yu
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Controllable Chemical Reaction & Material Chemical Engineering
- Hefei, China
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21
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Anderson R, Buscall R, Eldridge R, Mulvaney P, Scales P. Concentrated synthesis of metal nanoparticles in water. RSC Adv 2014. [DOI: 10.1039/c4ra04223a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Proposed mechanism of nanoparticle formation at high concentration.
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Affiliation(s)
- Rory Anderson
- Particulate Fluids Processing Centre
- The Department of Chemical and Biomolecular Engineering
- University of Melbourne
- Victoria 3010, Australia
| | | | - Robert Eldridge
- Particulate Fluids Processing Centre
- The Department of Chemical and Biomolecular Engineering
- University of Melbourne
- Victoria 3010, Australia
| | - Paul Mulvaney
- Bio21 Institute
- University of Melbourne
- Victoria 3010, Australia
| | - Peter Scales
- Particulate Fluids Processing Centre
- The Department of Chemical and Biomolecular Engineering
- University of Melbourne
- Victoria 3010, Australia
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22
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Boca-Farcau S, Potara M, Simon T, Juhem A, Baldeck P, Astilean S. Folic acid-conjugated, SERS-labeled silver nanotriangles for multimodal detection and targeted photothermal treatment on human ovarian cancer cells. Mol Pharm 2013; 11:391-9. [PMID: 24304361 DOI: 10.1021/mp400300m] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The effectiveness of a therapeutic agent for cancer stands in its ability to reduce and eliminate tumors without harming the healthy tissue nearby. Nanoparticles peripherally conjugated with targeting moieties offer major improvements in therapeutics through site specificity. In this study we demonstrate this approach by targeting the folate receptor of NIH:OVCAR-3 human ovary cancer cell line. Herein we used silver nanotriangles which were biocompatibilized with chitosan (bio)polymer, labeled with para-aminothiophenol (pATP) Raman reporter molecule, and conjugated with folic acid. The nanoparticles conjugation and efficient labeling was investigated by localized surface plasmon resonance (LSPR), zeta potential, and surface-enhanced Raman scattering (SERS) measurements. Conjugated particles were proven to be highly stable in aqueous and cellular medium. The targeted uptake of conjugated nanoparticles by human ovary cancer cells was confirmed by dark field microscopy and scattering spectra of the particles inside cells. Comparative studies revealed specific internalization of the conjugated nanoparticles in comparison with similar bare nanoparticles. Moreover, the SERS identity of the particles was proven to be highly conserved inside cells. Targeted cancer cell treatment conducted by irradiating the nanoparticle-treated cells with a continuous wave-nearinfrared (cw-NIR) laser in resonance with their plasmonic band proved an efficient therapeutic response. By integrating the advantages of multimodal optical imaging and SERS detection with hyperthermia capabilities through site specificity, these nanoparticles can represent a real candidate for personalized medicine.
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Affiliation(s)
- Sanda Boca-Farcau
- Nanobiophotonics and Laser Microspectroscopy Center, Interdisciplinary Research Institute on Bio-Nano-Sciences, Faculty of Physics, Babes-Bolyai University , M. Kogalniceanu Str. 1, 400084 Cluj-Napoca, Romania
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23
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Silver nanoplates: Tetradecyltrimethylammonium ions as additives in seed-growth synthesis and their potential application as catalysts for glucose oxidation reaction. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.05.110] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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24
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Gao T, Wang Y, Wang K, Zhang X, Dui J, Li G, Lou S, Zhou S. Controlled synthesis of homogeneous Ag nanosheet-assembled film for effective SERS substrate. ACS APPLIED MATERIALS & INTERFACES 2013; 5:7308-7314. [PMID: 23829572 DOI: 10.1021/am401552x] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Homogeneous Ag nanosheet-assembled film was successfully fabricated by using Cu plate through a simple modified solution method, where weak reductive Cu2O layer and complexing agent citrate ions were both introduced into the reaction system to control the reaction process. Meanwhile, citrate ions were used as morphology-controlled reagent to lead Ag units to grow in the form of nanosheet. The growth process exhibited that Ag nanosheet-assembled film formed slowly with reaction proceeding. Additionally, the pack density of nanosheets in the final product was found to be adjusted by the concentrations of Ag(+) ions in precursor solution. Using Rhodamine 6G (R6G) as probing molecules, the surface-enhanced Raman scattering (SERS) experiments showed that the Ag film assembled by nanosheets with high pack density exhibited excellent detecting performance, which could be used as effective SERS substrate for ultrasensitive detecting. Besides, a novel quintuplet SERS substrate could be synthesized in one batch by our method, which showed good reproducibility and a linear dependence between analyte concentrations and intensities, revealing the advantage of this method for easily scale-up production.
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Affiliation(s)
- Tao Gao
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University, Kaifeng 475004, P. R. China
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25
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Potara M, Boca S, Licarete E, Damert A, Alupei MC, Chiriac MT, Popescu O, Schmidt U, Astilean S. Chitosan-coated triangular silver nanoparticles as a novel class of biocompatible, highly sensitive plasmonic platforms for intracellular SERS sensing and imaging. NANOSCALE 2013; 5:6013-6022. [PMID: 23715524 DOI: 10.1039/c3nr00005b] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
There is a need for new strategies for noninvasive imaging of pathological conditions within the human body. The approach of combining the unique physical properties of noble-metal nanoparticles with their chemical specificity and an easy way of conjugation open up new routes toward building bio-nano-objects for biomedical tracking and imaging. This work reports the design and assessment of a novel class of biocompatible, highly sensitive SERS nanotags based on chitosan-coated silver nanotriangles (Chit-AgNTs) labeled with para-aminothiophenol (p-ATP). The triangular nanoparticles are used as Raman scattering enhancers and have proved to yield a reproducible and strong SERS signal. When tested inside lung cancer cells (A549) this class of SERS nanotags presents low in vitro toxicity, without interfering with cell proliferation. Easily internalized by the cells, as demonstrated by imaging using both reflected bright-light optical microscopy and SERS spectroscopy, the particles are proved to be detectable inside cells under a wide window of excitation wavelengths, ranging from visible to near infrared (NIR). Their high sensitivity and NIR availability make this class of SERS nanotags a promising candidate for noninvasive imaging of cancer cells.
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Affiliation(s)
- Monica Potara
- Nanobiophotonics and Laser Microscopy Center, Interdisciplinary Research in Bio-Nano-Sciences, and Faculty of Physics, Babes-Bolyai University, Treboniu Laurian Street 42, 400271 Cluj-Napoca, Romania.
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26
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Bi L, Rao Y, Tao Q, Dong J, Su T, Liu F, Qian W. Fabrication of large-scale gold nanoplate films as highly active SERS substrates for label-free DNA detection. Biosens Bioelectron 2013; 43:193-9. [DOI: 10.1016/j.bios.2012.11.029] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2012] [Revised: 11/23/2012] [Accepted: 11/26/2012] [Indexed: 10/27/2022]
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27
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Smitha SL, Gopchandran KG. Surface enhanced Raman scattering, antibacterial and antifungal active triangular gold nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 102:114-119. [PMID: 23220525 DOI: 10.1016/j.saa.2012.09.055] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2012] [Revised: 09/07/2012] [Accepted: 09/20/2012] [Indexed: 06/01/2023]
Abstract
Shape controlled syntheses of gold nanoparticles have attracted a great deal of attention as their optical, electronic, magnetic and biological properties are strongly dependent on the size and shape of the particles. Here is a report on the surface enhanced Raman scattering (SERS) activity of Cinnamomum zeylanicum leaf broth reduced gold nanoparticles consisting of triangular and spherical like particles, using 2-aminothiophenol (2-ATP) and crystal violet (CV) as probe molecules. Nanoparticles prepared with a minimum leaf broth concentration, having a greater number of triangular like particles exhibit a SERS activity of the order of 10(7). The synthesized nanoparticles exhibit efficient antibacterial activity against the tested gram negative bacterium Escherichia coli and gram positive bacterium Staphylococcus aureus. Investigations on the antifungal activity of the synthesized nanoparticles against Aspergillus niger and Fusarium oxysporum positive is also discussed.
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Affiliation(s)
- S L Smitha
- Department of Optoelectronics, University of Kerala, Thiruvananthapuram 695 581, India
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28
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Kim T, Jeon KS, Heo K, Kim HM, Park J, Suh YD, Hong S. Multilayered nano-prism vertex tips for tip-enhanced Raman spectroscopy and imaging. Analyst 2013; 138:5588-93. [DOI: 10.1039/c3an00808h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Ye Y, Liu H, Yang L, Liu J. Sensitive and selective SERS probe for trivalent chromium detection using citrate attached gold nanoparticles. NANOSCALE 2012; 4:6442-6448. [PMID: 22955571 DOI: 10.1039/c2nr31985c] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In this article, we have demonstrated a sensitive and selective surface enhanced Raman spectroscopy (SERS) probe, based on citrate-capped gold nanoparticles (AuNPs), for trivalent chromium (Cr(3+)) detection. After introducing Tween 20 to a solution of citrate-capped AuNPs, the as-prepared Tween 20/citrate-AuNP probe could recognize Cr(3+) at a 50 × 10(-9) M level in an aqueous medium at a pH of 6.0. Tween 20 can stabilize the citrate-capped AuNPs against conditions of high ionic strength. Due to the chelation between Cr(3+) and citrate ions, AuNPs undergo aggregation. As a result, it formed several hot spots and provided a significant enhancement of the Raman signal intensity through electromagnetic (EM) field enhancements. A detailed mechanism for tremendous SERS intensity change had been discussed. The selectivity of this system toward Cr(3+) was 400-fold, remarkably greater than other metal ions.
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Affiliation(s)
- Yingjie Ye
- Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, China
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30
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Li Z, Meng G, Huang Q, Zhu C, Zhang Z, Li X. Galvanic-cell-induced growth of Ag nanosheet-assembled structures as sensitive and reproducible SERS substrates. Chemistry 2012; 18:14948-53. [PMID: 23079922 DOI: 10.1002/chem.201201690] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 09/16/2012] [Indexed: 11/11/2022]
Abstract
SERS up: Ag nanosheet-assembled structures with controlled morphologies were achieved on indium tin oxide substrates by galvanic-cell-induced growth (see figure). These structures exhibit a highly active and homogeneous surface-enhanced Raman scattering (SERS) effect, and show promising potential as reliable SERS substrates for detection of trace polychlorinated biphenyls.
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Affiliation(s)
- Zhongbo Li
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, PR China
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31
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Liu G, Cai W, Kong L, Duan G, Li Y, Wang J, Zuo G, Cheng Z. Standing Ag nanoplate-built hollow microsphere arrays: Controllable structural parameters and strong SERS performances. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c1jm14296h] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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32
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Zhang XY, Hu A, Zhang T, Lei W, Xue XJ, Zhou Y, Duley WW. Self-assembly of large-scale and ultrathin silver nanoplate films with tunable plasmon resonance properties. ACS NANO 2011; 5:9082-92. [PMID: 21955107 DOI: 10.1021/nn203336m] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
We describe a rapid, simple, room-temperature technique for the production of large-scale metallic thin films with tunable plasmonic properties assembled from size-selected silver nanoplates (SNPs). We outline the properties of a series of ultrathin monolayer metallic films (8-20 nm) self-assembled on glass substrates in which the localized surface plasmon resonance can be tuned over a range from 500 to 800 nm. It is found that the resonance peaks of the films are strongly dependent on the size of the nanoplates and the refractive index of the surrounding dielectric. It is also shown that the bandwidth and the resonance peak of the plasmon resonance spectrum of the metallic films can be engineered by simply controlling aggregation of the SNP. A three-dimensional finite element method was used to investigate the plasmon resonance properties for individual SNPs in different dielectrics and plasmon coupling in SNP aggregates. A 5-17 times enhancement of scattering from these SNP films has been observed experimentally. Our experimental results, together with numerical simulations, indicate that this self-assembly method shows great promise in the production of nanoscale metallic films with enormous electric-field enhancements at visible and near-infrared wavelengths. These may be utilized in biochemical sensing, solar photovoltaic, and optical processing applications.
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Affiliation(s)
- Xiao-Yang Zhang
- School of Electronic Science and Engineering, Southeast University, and Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology, Ministry of Education, Nanjing, 210096, China
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33
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Feng M, Zhang M, Song JM, Li XG, Yu SH. Ultralong silver trimolybdate nanowires: synthesis, phase transformation, stability, and their photocatalytic, optical, and electrical properties. ACS NANO 2011; 5:6726-35. [PMID: 21770453 DOI: 10.1021/nn202296h] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Ultralong orthorhombic silver trimolybdate nanowires (NWs) can be synthesized by a simple hydrothermal process without using any structure directing agent. Their phase transformation and stability to thermal and modeling sunlight from a Xe lamp have been systematically studied. Well-dispersed Ag nanoparticles can in situ form on the backbone of the nanowires by photoirradiation, and their photocatalytic and optical properties have been investigated. The investigations on photocatalytic, photoluminescent, and surface-enhanced Raman scattering (SERS) of the as-synthesized nanowires indicate that these nanowires loaded with Ag nanoparticles by photoirradiation can be a new kind of photocatalytic and luminescent material and potentially can be used as an efficient SERS substrate. The electrical conductivity of an individual nanowire exhibits almost nonlinear and symmetric current/voltage (I/V) characteristics for bias voltages in the range of -5 to 5 V. Ohmic mechanism, Schottky, and the Poole-Frenkel emission play an important part, respectively, in low, medium, and high electrical fields.
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Affiliation(s)
- Mei Feng
- Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, People's Republic of China
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34
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Joo M, Lee M. Laser treatment of solution-deposited carbon nanotube thin films for improved conductivity and transparency. NANOTECHNOLOGY 2011; 22:265705. [PMID: 21576776 DOI: 10.1088/0957-4484/22/26/265705] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Solution-deposited single-walled carbon nanotube (SWCNT) films contain a surfactant material and it should be removed by a post-deposition treatment to improve the conductivity. We here report that the sodium dodecyl sulfate (SDS) surfactant in SWCNT films can be completely removed by a pulsed Nd:YAG laser (wavelength = 1064 nm, pulse width = 99 ms). SWCNT films were spray-coated onto a glass substrate and were scanned by a laser beam of 2 mm size. In this process, individual nanotubes absorb the laser energy and generate heat to vaporize the surrounding surfactant. This mechanism was supported by the fact that the required pulse energy decreased as the SWCNT density increased. An encouraging feature is that unlike typical acid treatments, the laser treatment can improve not only the conductivity but also the transmittance. This might be associated with complete surfactant removal without leaving any particulate debris. For a film, the sheet resistance decreased from 1.07 kΩ/sq to 700 Ω/sq and its visible transmittance simultaneously increased by 4%.
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Affiliation(s)
- Myungo Joo
- Department of Materials Science and Engineering, Yonsei University, Seoul, Korea
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35
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Huang CH, Lin HY, Chen S, Liu CY, Chui HC, Tzeng Y. Electrochemically fabricated self-aligned 2-D silver/alumina arrays as reliable SERS sensors. OPTICS EXPRESS 2011; 19:11441-50. [PMID: 21716375 DOI: 10.1364/oe.19.011441] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
A novel SERS sensor for adenine molecules is fabricated electrochemically using an ordered two-dimensional array of self-aligned silver nanoparticles encapsulated by alumina. Silver is electro-deposited on the interior surfaces at the bottom of nano-channels in a porous anodic aluminum oxide (AAO) film. After etching aluminum, the back-end alumina serves as a SERS substrate. SERS enhancement factor greater than 10(6) is measured by 532 nm illumination. It exhibits robust chemical stability and emits reproducible Raman signals from repetitive uses for eight weeks. The inexpensive mass production process makes this reliable, durable and sensitive plasmon based optical device promising for many applications.
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Affiliation(s)
- Chen-Han Huang
- Institute of Microelectronics, National Cheng Kung University, Tainan, Taiwan
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36
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Hao J, Han MJ, Xu Z, Li J, Meng X. Fabrication and evolution of multilayer silver nanofilms for surface-enhanced Raman scattering sensing of arsenate. NANOSCALE RESEARCH LETTERS 2011; 6:263. [PMID: 21711772 PMCID: PMC3211326 DOI: 10.1186/1556-276x-6-263] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Accepted: 03/28/2011] [Indexed: 05/29/2023]
Abstract
Surface-enhanced Raman scattering (SERS) has recently been investigated extensively for chemical and biomolecular sensing. Multilayer silver (Ag) nanofilms deposited on glass slides by a simple electroless deposition process have been fabricated as active substrates (Ag/GL substrates) for arsenate SERS sensing. The nanostructures and layer characteristics of the multilayer Ag films could be tuned by varying the concentrations of reactants (AgNO3/BuNH2) and reaction time. A Ag nanoparticles (AgNPs) double-layer was formed by directly reducing Ag+ ions on the glass surfaces, while a top layer (3rd-layer) of Ag dendrites was deposited on the double-layer by self-assembling AgNPs or AgNPs aggregates which had already formed in the suspension. The SERS spectra of arsenate showed that characteristic SERS bands of arsenate appear at approximately 780 and 420 cm-1, and the former possesses higher SERS intensity. By comparing the peak heights of the approximately 780 cm-1 band of the SERS spectra, the optimal Ag/GL substrate has been obtained for the most sensitive SERS sensing of arsenate. Using this optimal substrate, the limit of detection (LOD) of arsenate was determined to be approximately 5 μg·l-1.
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Affiliation(s)
- Jumin Hao
- Center for Environmental Systems, Stevens Institute of Technology, Hoboken, NJ 07030, USA
| | - Mei-Juan Han
- Center for Environmental Systems, Stevens Institute of Technology, Hoboken, NJ 07030, USA
| | - Zhonghou Xu
- Center for Environmental Systems, Stevens Institute of Technology, Hoboken, NJ 07030, USA
| | - Jinwei Li
- Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA
| | - Xiaoguang Meng
- Center for Environmental Systems, Stevens Institute of Technology, Hoboken, NJ 07030, USA
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37
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Sajanlal PR, Sreeprasad TS, Samal AK, Pradeep T. Anisotropic nanomaterials: structure, growth, assembly, and functions. NANO REVIEWS 2011; 2:NANO-2-5883. [PMID: 22110867 PMCID: PMC3215190 DOI: 10.3402/nano.v2i0.5883] [Citation(s) in RCA: 192] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2010] [Accepted: 12/11/2010] [Indexed: 02/04/2023]
Abstract
Comprehensive knowledge over the shape of nanomaterials is a critical factor in designing devices with desired functions. Due to this reason, systematic efforts have been made to synthesize materials of diverse shape in the nanoscale regime. Anisotropic nanomaterials are a class of materials in which their properties are direction-dependent and more than one structural parameter is needed to describe them. Their unique and fine-tuned physical and chemical properties make them ideal candidates for devising new applications. In addition, the assembly of ordered one-dimensional (1D), two-dimensional (2D), and three-dimensional (3D) arrays of anisotropic nanoparticles brings novel properties into the resulting system, which would be entirely different from the properties of individual nanoparticles. This review presents an overview of current research in the area of anisotropic nanomaterials in general and noble metal nanoparticles in particular. We begin with an introduction to the advancements in this area followed by general aspects of the growth of anisotropic nanoparticles. Then we describe several important synthetic protocols for making anisotropic nanomaterials, followed by a summary of their assemblies, and conclude with major applications.
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Affiliation(s)
- Panikkanvalappil R Sajanlal
- DST Unit of Nanoscience (DST UNS), Department of Chemistry, Indian Institute of Technology Madras, Chennai, India
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38
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Prucek R, Panáček A, Fargašová A, Ranc V, Mašek V, Kvítek L, Zbořil R. Re-crystallization of silver nanoparticles in a highly concentrated NaCl environment—a new substrate for surface enhanced IR-visible Raman spectroscopy. CrystEngComm 2011. [DOI: 10.1039/c0ce00776e] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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39
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Zhang Z, Xu F, Yang W, Guo M, Wang X, Zhang B, Tang J. A facile one-pot method to high-quality Ag-graphene composite nanosheets for efficient surface-enhanced Raman scattering. Chem Commun (Camb) 2011; 47:6440-2. [DOI: 10.1039/c1cc11125f] [Citation(s) in RCA: 232] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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40
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Guo S, Dong S. Metal nanomaterial-based self-assembly: Development, electrochemical sensing and SERS applications. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11382h] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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41
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Potara M, Gabudean AM, Astilean S. Solution-phase, dual LSPR-SERS plasmonic sensors of high sensitivity and stability based on chitosan-coated anisotropic silver nanoparticles. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm03329d] [Citation(s) in RCA: 120] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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42
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Prucek R, Panacek A, Soukupova J, Novotny R, Kvitek L. Reproducible synthesis of silver colloidal particles tailored for application in near-infrared surface-enhanced Raman spectroscopy. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm03870a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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Jana D, De G. Spontaneous generation and shape conversion of silver nanoparticles in alumina sol, and shaped silver nanoparticle incorporated alumina films. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm03743e] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Kim JY, Kim SJ, Jang DJ. Laser-induced shape transformation and electrophoretic analysis of triangular silver nanoplates. J Sep Sci 2010; 32:4161-6. [PMID: 20066680 DOI: 10.1002/jssc.200900442] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The shape transformation of silver triangular nanoplates induced by nanosecond laser pulses has been monitored using agarose gel electrophoresis as well as optical spectroscopy and electron microscopy. Laser irradiation truncates the vertices of the triangular nanoplates, having an average edge size of 110 nm and an average thickness of 14 nm, to form nearly regular-hexagonal and spherical silver nanoplates gradually. The surface-enhanced Raman scattering of 4-nitrobenzenethiol absorbed on silver nanoparticles has been found to decrease enormously with laser irradiation, showing its strong dependence on the shape transformation of nanostructures. Electrophoretic mobility values have been found to decrease substantially with the increase of irradiation time, indicating that the surface charge density of silver nanoplates has been modified largely by laser pulses.
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Affiliation(s)
- Jong-Yeob Kim
- School of Chemistry, Seoul National University, Seoul, Republic of Korea
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45
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Liu G, Cai W, Kong L, Duan G, Lü F. Vertically cross-linking silver nanoplate arrays with controllable density based on seed-assisted electrochemical growth and their structurally enhanced SERS activity. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b917167c] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Preparation and characterization of water-dispersible silver nanoparticles stabilized by PEO-conjugated pro-drugs. Macromol Res 2009. [DOI: 10.1007/bf03218613] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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47
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Aydin O, Altaş M, Kahraman M, Bayrak OF, Culha M. Differentiation of healthy brain tissue and tumors using surface-enhanced Raman scattering. APPLIED SPECTROSCOPY 2009; 63:1095-100. [PMID: 19843358 DOI: 10.1366/000370209789553219] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Surface-enhanced Raman scattering (SERS) is a powerful technique for characterization of biological samples. SERS spectra from healthy brain tissue and tumors are obtained by sudden freezing of tissue in liquid nitrogen and crashing and mixing it with a concentrated silver colloidal suspension. The acquired spectra from tissues show significant spectral differences that can be used to identify whether it is from a healthy region or tumor. The most significant change on SERS spectra from the healthy/peripheral brain tissue to tumor is the increase of the ratio of the peaks at around 723 to 655 cm(-1). In addition, the spectral changes indicate that the protein content in tumors increases compared to the peripheral/healthy tissue as observed with tumor invasion. The preliminary results show that SERS spectra can be used for a quick diagnosis due to the simplicity of the sample preparation and the speed of the spectral acquisition.
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Affiliation(s)
- Omer Aydin
- Yeditepe University, Faculty of Engineering and Architecture, Department of Genetics and Bioengineering, 34755 Kayisdagi-Istanbul, Turkey
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48
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Soejima T, Kimizuka N. One-Pot Room-Temperature Synthesis of Single-Crystalline Gold Nanocorolla in Water. J Am Chem Soc 2009; 131:14407-12. [DOI: 10.1021/ja904910m] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Tetsuro Soejima
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University and JST, CREST, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Nobuo Kimizuka
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University and JST, CREST, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
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Aherne D, Charles DE, Brennan-Fournet ME, Kelly JM, Gun'ko YK. Etching-resistant silver nanoprisms by epitaxial deposition of a protecting layer of gold at the edges. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:10165-10173. [PMID: 19583184 DOI: 10.1021/la9009493] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The protection of silver nanoprisms against etching by the epitaxial deposition of a thin layer of gold in solution has been investigated. It has been found that at low Au/Ag ratios (approximately 0.08 to 0.17) a thin layer of gold is deposited on the edges of the nanoprisms as expected, but without the structural damage typically associated with galvanic replacement. Furthermore, this layer of gold provides robust protection against etching of the nanoprisms by chloride and is strong evidence that etching by chloride is face-selective and does not take place at the flat {111} faces of the nanoprisms. Additionally, the deposition of a protecting layer of gold results in only a small red shift in the position of the main plasmon resonance. We have investigated the sensitivity of the localized surface plasmon resonance (LSPR) to changes in the bulk refractive index of the solution and find that the gold-protected silver nanoprisms are promising candidates for the development of new refractive index-based biosensors.
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Affiliation(s)
- Damian Aherne
- School of Chemistry, Trinity College Dublin, Dublin 2, Ireland.
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Kulkarni AP, Munechika K, Noone KM, Smith JM, Ginger DS. Phase transfer of large anisotropic plasmon resonant silver nanoparticles from aqueous to organic solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:7932-7939. [PMID: 19441811 DOI: 10.1021/la900600z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We describe the phase transfer of large, anisotropic, silver nanoparticles (approximately 50-100 nm edge length) from water to polar organics such as alcohols, acetone, dimethylformamide and to nonpolar hexanes. We transferred the silver nanoparticles to the polar organic solvents via their precipitation in water by centrifugation and redispersion in organics. Using scanning electron microscopy (SEM) imaging and UV-vis extinction spectra, we confirmed that there was little to no shape change in the nanoparticles upon transfer to the polar solvents. The nanoparticles were stable for months in the polar organics. We also transferred the nanoparticles to hexanes with up to 75% phase transfer efficiency by using sodium oleate as a surfactant. We found the extinction spectra and transmission electron microscopy (TEM) images of the nanoparticles were similar in water and hexanes, indicating that exchange into hexanes resulted in an only slight change in shape. The nanoparticles were stable for at least 10 days in hexanes under appropriate conditions. The phase transfer efficiency decreased with an increase in the size of the nanoparticles. These results open the possibility for the conjugation of large, anisotropic plasmon resonant silver nanoparticles with organic dyes or their blends with conjugated polyelectrolytes for fundamental optical studies and applications.
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