101
|
Sigle DO, Kasera S, Herrmann LO, Palma A, de Nijs B, Benz F, Mahajan S, Baumberg JJ, Scherman OA. Observing Single Molecules Complexing with Cucurbit[7]uril through Nanogap Surface-Enhanced Raman Spectroscopy. J Phys Chem Lett 2016; 7:704-10. [PMID: 26766205 DOI: 10.1021/acs.jpclett.5b02535] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
In recent years, single-molecule sensitivity achievable by surface-enhanced Raman spectroscopy (SERS) has been widely reported. We use this to investigate supramolecular host-guest chemistry with the macrocyclic host cucurbit[7]uril, on a few-to-single-molecule level. A nanogap geometry, comprising individual gold nanoparticles on a planar gold surface spaced by a single layer of molecules, gives intense SERS signals. Plasmonic coupling between the particle and the surface leads to strongly enhanced optical fields in the gap between them, with single-molecule sensitivity established using a modification of the well-known bianalyte method. Changes in the Raman modes of the host molecule are observed when single guests included inside its cavity internally stretch it. Anisotropic intermolecular interactions with the guest are found which show additional distinct features in the Raman modes of the host molecule.
Collapse
Affiliation(s)
- Daniel O Sigle
- Nanophotonics Centre, Cavendish Laboratory, University of Cambridge , Cambridge CB3 0HE, U.K
| | - Setu Kasera
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge , Cambridge CB2 1EW, U.K
| | - Lars O Herrmann
- Nanophotonics Centre, Cavendish Laboratory, University of Cambridge , Cambridge CB3 0HE, U.K
| | - Aniello Palma
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge , Cambridge CB2 1EW, U.K
| | - Bart de Nijs
- Nanophotonics Centre, Cavendish Laboratory, University of Cambridge , Cambridge CB3 0HE, U.K
| | - Felix Benz
- Nanophotonics Centre, Cavendish Laboratory, University of Cambridge , Cambridge CB3 0HE, U.K
| | - Sumeet Mahajan
- Nanophotonics Centre, Cavendish Laboratory, University of Cambridge , Cambridge CB3 0HE, U.K
| | - Jeremy J Baumberg
- Nanophotonics Centre, Cavendish Laboratory, University of Cambridge , Cambridge CB3 0HE, U.K
| | - Oren A Scherman
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge , Cambridge CB2 1EW, U.K
| |
Collapse
|
102
|
Fan W, Yue-E M, Ling X, Liu T. Free-Standing Silver Nanocube/Graphene Oxide Hybrid Paper for Surface-Enhanced Raman Scattering. CHINESE J CHEM 2016. [DOI: 10.1002/cjoc.201500585] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
103
|
Yan X, Li P, Yang L, Liu J. Time-dependent SERS spectra monitoring the dynamic adsorption behavior of bipyridine isomerides combined with bianalyte method. Analyst 2016; 141:5189-94. [DOI: 10.1039/c6an00771f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Based on the bianalyte method, time-dependent surface-enhanced Raman spectrosopy (SERS) spectra were applied to observe and study the competitive adsorption of bipyridine isomerides 2,2′-bpy and 4,4′-bpy.
Collapse
Affiliation(s)
- Xiunan Yan
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei
- China
- Department of Chemistry
| | - Pan Li
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei
- China
- Department of Chemistry
| | - Liangbao Yang
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei
- China
- Department of Chemistry
| | - Jinhuai Liu
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei
- China
- Department of Chemistry
| |
Collapse
|
104
|
Zhou L, Zhou J, Feng Z, Wang F, Xie S, Bu S. Immunoassay for tumor markers in human serum based on Si nanoparticles and SiC@Ag SERS-active substrate. Analyst 2016; 141:2534-41. [DOI: 10.1039/c6an00003g] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
An immunoassay protocol is described to detect tumor markers in human serum based on a sandwich structure consisting of nano-Si immune probes and SiC@Ag SERS-active immune substrate.
Collapse
Affiliation(s)
- Lu Zhou
- Institute of Photonics
- Faculty of Science
- Ningbo University
- Ningbo 315211
- China
| | - Jun Zhou
- Institute of Photonics
- Faculty of Science
- Ningbo University
- Ningbo 315211
- China
| | - Zhao Feng
- Institute of Photonics
- Faculty of Science
- Ningbo University
- Ningbo 315211
- China
| | - Fuyan Wang
- Diabetes Center
- Zhejiang Provincial Key Laboratory of Pathophysiology
- School of Medicine
- Ningbo University
- Ningbo, 325211
| | - Shushen Xie
- Key Laboratory of Optoelectronic Science & Technology for Medicine of Ministry of Education
- Fujian Normal University
- Fuzhou 350007
- China
| | - Shizhong Bu
- Diabetes Center
- Zhejiang Provincial Key Laboratory of Pathophysiology
- School of Medicine
- Ningbo University
- Ningbo, 325211
| |
Collapse
|
105
|
Zhang L, Jin Y, Huang X, Zhou Y, Du S, Zhang Z. Ligand Replacement Approach to Raman-Responded Molecularly Imprinted Monolayer for Rapid Determination of Penicilloic Acid in Penicillin. Anal Chem 2015; 87:11763-70. [DOI: 10.1021/acs.analchem.5b03088] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Liying Zhang
- School
of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211166, China
| | - Yang Jin
- School
of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211166, China
| | - Xiaoyan Huang
- School
of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211166, China
| | - Yujie Zhou
- School
of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211166, China
| | - Shuhu Du
- School
of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211166, China
| | - Zhongping Zhang
- Institute
of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, China
- State
Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| |
Collapse
|
106
|
Kuo YL, Juang TY, Chang SH, Tsai CM, Lai YS, Yang LC, Huang CL. Influence of Temperature on the Formation of Silver Nanoparticles by using a Seed-Free Photochemical Method under Sodium-Lamp Irradiation. Chemphyschem 2015; 16:3254-63. [PMID: 26269109 DOI: 10.1002/cphc.201500485] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 07/30/2015] [Indexed: 11/06/2022]
Abstract
Silver nanoparticles can be prepared by using a seed-free photo-assisted citrate reduction method under the irradiation of a sodium lamp. Under the same irradiation intensity, bath temperatures are crucial in influencing the reaction rate, morphologies of final products, and shape evolution of the silver nanostructures. For example, when the bath temperature is 80 °C, the product yields of silver nanoplates, nanorods, and nanodecahedra are 38±6 %, 35±10 %, and 12±8 %, respectively. However, when the bath temperature is 30 °C, the product yields of silver nanoplates, nanorods, and nanodecahedra are 6±3 %, 0 %, and 83±16 %, respectively. Time-dependent UV/Vis spectra and TEM images show that silver nanoplates were formed at the earlier reaction stage and greatly decreased in amount at the later stage when the bath temperatures are less than or equal to 40 °C. This indicates that the silver nanoplates, which can be regarded as intermediates, are kinetically favored products. They are not thermodynamically favored products at these relatively low bath temperatures. The SERS spectra of crystal violet (CV) show that all the silver colloids synthesized at various temperatures exhibit good enhancement factors and that the colloids prepared at lower bath temperatures have a higher enhancement factor.
Collapse
Affiliation(s)
- Yen-Ling Kuo
- Department of Applied Chemistry, National Chiayi University, 300 Sha-Fu Road, Chiayi City, 60004, Taiwan
| | - Tzong-Yuan Juang
- Department of Applied Chemistry, National Chiayi University, 300 Sha-Fu Road, Chiayi City, 60004, Taiwan
| | - Shi-Hise Chang
- Department of Applied Chemistry, National Chiayi University, 300 Sha-Fu Road, Chiayi City, 60004, Taiwan
| | - Chin-Ming Tsai
- Department of Applied Chemistry, National Chiayi University, 300 Sha-Fu Road, Chiayi City, 60004, Taiwan
| | - Yen-Shang Lai
- Department of Applied Chemistry, National Chiayi University, 300 Sha-Fu Road, Chiayi City, 60004, Taiwan
| | - Li-Chen Yang
- Department of Applied Chemistry, National Chiayi University, 300 Sha-Fu Road, Chiayi City, 60004, Taiwan
| | - Cheng-Liang Huang
- Department of Applied Chemistry, National Chiayi University, 300 Sha-Fu Road, Chiayi City, 60004, Taiwan.
| |
Collapse
|
107
|
Lane LA, Qian X, Nie S. SERS Nanoparticles in Medicine: From Label-Free Detection to Spectroscopic Tagging. Chem Rev 2015; 115:10489-529. [DOI: 10.1021/acs.chemrev.5b00265] [Citation(s) in RCA: 607] [Impact Index Per Article: 67.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Lucas A. Lane
- Departments
of Biomedical Engineering and Chemistry, Emory University and Georgia Institute of Technology, Health Sciences Research Building,
Room E116, 1760 Haygood Drive, Atlanta, Georgia 30322, United States
| | - Ximei Qian
- Departments
of Biomedical Engineering and Chemistry, Emory University and Georgia Institute of Technology, Health Sciences Research Building,
Room E116, 1760 Haygood Drive, Atlanta, Georgia 30322, United States
| | - Shuming Nie
- Departments
of Biomedical Engineering and Chemistry, Emory University and Georgia Institute of Technology, Health Sciences Research Building,
Room E116, 1760 Haygood Drive, Atlanta, Georgia 30322, United States
- College
of Engineering and Applied Sciences, Nanjing University, 22 Hankou
Road, Nanjing, Jiangsu Province 210093, China
| |
Collapse
|
108
|
Deng W, Goldys EM. Chemical sensing with nanoparticles as optical reporters: from noble metal nanoparticles to quantum dots and upconverting nanoparticles. Analyst 2015; 139:5321-34. [PMID: 25170528 DOI: 10.1039/c4an01272k] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A wide variety of biological and medical analyses are based on the use of optical signals to report specific molecular events. Thanks to advances in nanotechnology, various nanostructures have been extensively used as optical reporters in bio- and chemical assays. This review describes recent progress in chemical sensing using noble metal nanoparticles (gold and silver), quantum dots and upconverting nanoparticles. It provides insights into various nanoparticle-based sensing strategies including fluorescence/luminescence resonance energy transfer nanoprobes as well as activatable probes sensitive to specific changes in the biological environment. Finally we list some research challenges to be overcome in order to accelerate the development of applications of nanoparticle bio- and chemical sensors.
Collapse
Affiliation(s)
- Wei Deng
- Centre for Nanoscale BioPhotonics, Macquarie University, North Ryde, 2109, NSW, Australia.
| | | |
Collapse
|
109
|
Tian C, Li J, Ma C, Wang P, Sun X, Fang J. An ordered mesoporous Ag superstructure synthesized via a template strategy for surface-enhanced Raman spectroscopy. NANOSCALE 2015; 7:12318-12324. [PMID: 26145709 DOI: 10.1039/c5nr03759j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Surface-enhanced Raman scattering (SERS) substrates with high density and uniformity of nanogaps are proven to enhance the reproducibility and sensitivity of the Raman signal. Up to now, the syntheses of a highly ordered gold or silver superstructure with a controllable nanoparticle size and a well-defined particle gap have been quite limited. Here, we reported an ordered mesoporous silver superstructure replicated by using ordered mesoporous KIT-6 and SAB-15 as templates. By means of a nanocasting process, the ordered mesoporous Ag superstructure was successfully synthesized, which shows uniform distribution of the nanowire diameter (10 nm) and nanogap size (∼2 nm), thus exhibiting a high Raman enhancement of ∼10(9). The finite difference time-domain (FDTD) results indicate that the ordered mesoporous Ag superstructure has a uniform distribution of hot spots. Therefore, the mesoporous silica template strategy presented here could lead to a new class of high quality SERS substrates providing extraordinary potential for diverse applications.
Collapse
Affiliation(s)
- Cuifeng Tian
- School of Science, Key Laboratory of the Ministry of Education and International Center for Dielectric Research, Xi'an Jiaotong University, Shann xi, 710049, China.
| | | | | | | | | | | |
Collapse
|
110
|
Thickness of a metallic film, in addition to its roughness, plays a significant role in SERS activity. Sci Rep 2015; 5:11644. [PMID: 26119106 PMCID: PMC5155581 DOI: 10.1038/srep11644] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 05/22/2015] [Indexed: 11/09/2022] Open
Abstract
In this paper we evaluate the effect of roughness and thickness of silver film substrates, fabricated on glass and polydimethylsiloxane (PDMS) templates, on surface-enhanced Raman Spectroscopy (SERS) activity. While the silver substrates obtained on glass templates exhibit nm-scale roughness, the silver substrates on PDMS templates show larger roughness, on the order of 10 s of nm. These roughness values do not change significantly with the thickness of the silver film. The SERS intensities of 4-aminothiophenol (ATP) deposited on these substrates strongly depend on both roughness and thickness, with more significant contribution from the roughness on thinner films. FEM simulations of the electric field intensities on surfaces of different thicknesses for rough and flat surfaces suggest higher localized plamons on thinner, rough surfaces. This study indicates that, besides roughness, the thickness of the metallic layer plays a significant role in the SERS activity.
Collapse
|
111
|
Panagiotopoulos NT, Kalfagiannis N, Vasilopoulos KC, Pliatsikas N, Kassavetis S, Vourlias G, Karakassides MA, Patsalas P. Self-assembled plasmonic templates produced by microwave annealing: applications to surface-enhanced Raman scattering. NANOTECHNOLOGY 2015; 26:205603. [PMID: 25918264 DOI: 10.1088/0957-4484/26/20/205603] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Perhaps the simplest method for creating metal nanoparticles on a substrate is by driving their self-assembly with the thermal annealing of a thin metal film. By properly tuning the annealing parameters one hopes to discover a recipe that allows the pre-determined design of the NP arrangement. However, thermal treatment is known for detrimental effects and is not really the manufacturer's route of choice when it comes to large-scale applications. An alternative method is the use of microwave annealing, a method that has never been applied for metal processing, due to the high reflectance of microwave radiation at the surface of a metal. However, in this work we challenge the widely used nanostructuring methods by proving the microwave's annealing ability to produce plasmonic templates, out of extremely thin metal films, by simply using a domestic microwave oven apparatus. We show that this process is generic and independent of the deposition method used for the metal and we further quantify the suitability of these plasmonic templates for use in surface-enhanced Raman scattering applications.
Collapse
Affiliation(s)
- N T Panagiotopoulos
- University of Ioannina, Department of Materials Science and Engineering, GR-45110 Ioannina, Greece
| | | | | | | | | | | | | | | |
Collapse
|
112
|
Jamil AK, Izake EL, Sivanesan A, Fredericks PM. Rapid detection of TNT in aqueous media by selective label free surface enhanced Raman spectroscopy. Talanta 2015; 134:732-738. [DOI: 10.1016/j.talanta.2014.12.022] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 11/25/2014] [Accepted: 12/18/2014] [Indexed: 12/27/2022]
|
113
|
Aksyuk V, Lahiri B, Holland G, Centrone A. Near-field asymmetries in plasmonic resonators. NANOSCALE 2015; 7:3634-3644. [PMID: 25636125 DOI: 10.1039/c4nr06755j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Surface-enhanced infrared absorption (SEIRA) spectroscopy exploits the locally enhanced field surrounding plasmonic metamaterials to increase the sensitivity of infrared spectroscopy. The light polarization and incidence angle are important factors for exciting plasmonic nanostructures; however, such angle dependence is often ignored in SEIRA experiments, typically carried out with Cassegrain objectives. Here, the photothermal induced resonance technique and numerical simulations are used to map the distribution and intensity of SEIRA hot-spots surrounding gold asymmetric split ring resonators (ASRRs) as a function of light polarization and incidence angle. The results show asymmetric near-field SEIRA enhancements as a function of the incident illumination direction which, in analogy with the symmetry-breaking occurring in asymmetric transmission, we refer to as symmetry-breaking absorption. Numerical calculations reveal that the symmetry-breaking absorption in ASRRs originates in the angle-dependent interference between the electric and magnetic excitation channels of the resonators' dark-mode. Consequently, to maximize the SEIRA intensity, ASRRs should be illuminated from the dielectric side at an angle that maximizes the constructive interference of the two excitation channels, (35° for the structures studied here), in place of the Cassegrain objectives. These results can be generalized to all structures characterized by plasmonic excitations that give rise to a surface-normal magnetic moment and that possess an electric dipole.
Collapse
Affiliation(s)
- Vladimir Aksyuk
- NIST, Center for Nanoscale Science and Technology, 100 Bureau Drive, Gaithersburg, MD 20899, USA.
| | | | | | | |
Collapse
|
114
|
Meng W, Hu F, Jiang X, Lu L. Preparation of silver colloids with improved uniformity and stable surface-enhanced Raman scattering. NANOSCALE RESEARCH LETTERS 2015; 10:34. [PMID: 25852331 PMCID: PMC4384897 DOI: 10.1186/s11671-015-0746-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Accepted: 01/10/2015] [Indexed: 05/06/2023]
Abstract
Silver colloids of uniform shape and size are prepared by a two-step reduction. Small silver particles form initially by the rapid reduction of silver nitrate with sodium citrate at 100°C and then grow at 92°C. The reaction processes and resulting silver colloids are characterized by transmission electron microscopy, ultraviolet-visible absorption spectrophotometry, zeta-potential measurements, and Ag(+) concentration analysis. The surface-enhanced Raman scattering (SERS) activity of the silver colloids is then investigated, using crystal violet (CV) as a SERS probe. The silver colloids exhibit uniform shape and size and stable SERS activity. The average size of the silver particles is 47 nm (14% relative standard deviation), while the average sizes of the silver colloids prepared at 100°C and 92°C are 41 (30%) and 71 nm (33%), respectively.
Collapse
Affiliation(s)
- Wei Meng
- />School of Sciences, China Pharmaceutical University, Nanjing, 211198 China
- />Key Laboratory for Soft Chemistry and Functional Materials of Ministry Education, Nanjing University of Science and Technology, Nanjing, 210094 China
| | - Fang Hu
- />School of Sciences, China Pharmaceutical University, Nanjing, 211198 China
| | - Xiaohong Jiang
- />Key Laboratory for Soft Chemistry and Functional Materials of Ministry Education, Nanjing University of Science and Technology, Nanjing, 210094 China
| | - Lude Lu
- />Key Laboratory for Soft Chemistry and Functional Materials of Ministry Education, Nanjing University of Science and Technology, Nanjing, 210094 China
| |
Collapse
|
115
|
Hara R, Fukuoka T, Takahashi R, Utsumi Y, Yamaguchi A. Surface-enhanced Raman spectroscopy using a coffee-ring-type three-dimensional silver nanostructure. RSC Adv 2015. [DOI: 10.1039/c4ra09309g] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
We demonstrated surface-enhanced Raman spectroscopy using a coffee-ring-type three-dimensional silver nanostructure (Ag3D).
Collapse
Affiliation(s)
- R. Hara
- Laboratory of Advanced Science and Technology for Industry
- University of Hyogo
- Hyogo 678-1205
- Japan
| | - T. Fukuoka
- Laboratory of Advanced Science and Technology for Industry
- University of Hyogo
- Hyogo 678-1205
- Japan
| | - R. Takahashi
- Laboratory of Advanced Science and Technology for Industry
- University of Hyogo
- Hyogo 678-1205
- Japan
| | - Y. Utsumi
- Laboratory of Advanced Science and Technology for Industry
- University of Hyogo
- Hyogo 678-1205
- Japan
| | - A. Yamaguchi
- Laboratory of Advanced Science and Technology for Industry
- University of Hyogo
- Hyogo 678-1205
- Japan
| |
Collapse
|
116
|
Chu J, Zhao Y, Li SH, Li WW, Chen XY, Huang YX, Chen YP, Qu WG, Yu HQ, Xu AW, Liu G, Tian YC, Xiong Y. A highly-ordered and uniform sunflower-like dendritic silver nanocomplex array as reproducible SERS substrate. RSC Adv 2015. [DOI: 10.1039/c4ra11151f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A highly reproducible SERS substrate of Ag nanocomplex array with highly-ordered sunflower-like structure has been fabricated by integrating lithography and electrodeposition.
Collapse
|
117
|
A wide range optical pH sensor for living cells using Au@Ag nanoparticles functionalized carbon nanotubes based on SERS signals. Anal Bioanal Chem 2014; 406:6337-46. [DOI: 10.1007/s00216-014-8064-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 07/21/2014] [Accepted: 07/24/2014] [Indexed: 01/06/2023]
|
118
|
Pradhan M, Sinha AK, Pal T. Redox transformation reaction for hierarchical hollow Au–MnOOH flowers for high SERS activity. RSC Adv 2014. [DOI: 10.1039/c4ra03544e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
|
119
|
Zhang P, Yang S, Wang L, Zhao J, Zhu Z, Liu B, Zhong J, Sun X. Large-scale uniform Au nanodisk arrays fabricated via x-ray interference lithography for reproducible and sensitive SERS substrate. NANOTECHNOLOGY 2014; 25:245301. [PMID: 24859832 DOI: 10.1088/0957-4484/25/24/245301] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Large-scale Au nanodisk arrays on Si substrate are successfully fabricated via x-ray interference lithography and followed by electron-beam vapor deposition. The Au nanodisk arrays exhibit a significant, uniform, and reproducible surface enhancement on Raman scattering signal, which enables the detection of R6G as low as 10(-8) M with an enhancement factor of 10(6). Importantly, the Au nanodisk arrays SERS-active substrates with uniformly high sensitivity also have high reproducibility and stability. The diameters of the nanodisks and the inter-disk distance can be simply optimized to obtain high enhancement in Raman signal by varying exposure time and development time in XIL process. The electric fields of the Au nanodisks with various diameters and inter-disk distance simulated by the finite difference time domain (FDTD) techniques further confirm that the Raman signal enhancement of Au nanodisks is determined by the diameters of nanodisks and the inter-disk distance of nanodisks. The Au/Ag double-layer bimetal nanodisk arrays are also fabricated which show a significant increase in the Raman signal enhancement than that of the Au nanodisk arrays. XIL nanofabrication appears to be a feasible approach to prepare uniform and reproducible SERS-active substrates with high sensitivity for practical SERS applications.
Collapse
Affiliation(s)
- Pingping Zhang
- Soochow University-Western University Centre for Synchrotron Radiation Research, Institute of Functional Nano & Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science & Technology, Soochow University, Suzhou, Jiangsu, 215123, People's Republic of China
| | | | | | | | | | | | | | | |
Collapse
|
120
|
New sample preparation procedure for effective improvement on surface-enhanced Raman scattering effects. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2014.03.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
121
|
Lee H, Kim Y, Park A, Nam JM. Amyloid-β aggregation with gold nanoparticles on brain lipid bilayer. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:1779-89. [PMID: 24664514 DOI: 10.1002/smll.201303242] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Revised: 12/26/2013] [Indexed: 05/05/2023]
Abstract
Understanding and manipulating amyloid-β (Aβ) aggregation provide key knowledge and means for the diagnosis and cure of Alzheimer's disease (AD) and the applications of Aβ-based aggregation systems. Here, we studied the formation of various Aβ aggregate structures with gold nanoparticles (AuNPs) and brain total lipid extract-based supported lipid bilayer (brain SLB). The roles of AuNPs and brain SLB in forming Aβ aggregates were studied in real time, and the structural details of Aβ aggregates were monitored and analyzed with the dark-field imaging of plasmonic AuNPs that allows for long-term in situ imaging of Aβ aggregates with great structural details without further labeling. It was shown that the fluid brain SLB platform provides the binding sites for Aβ and drives the fast and efficient formation of Aβ aggregate structures and, importantly, large Aβ plaque structures (>15 μm in diameter), a hallmark for AD, were formed without going through fibril structures when Aβ peptides were co-incubated with AuNPs on the brain SLB. The dark-field scattering and circular dichroism-correlation data suggest that AuNPs were heavily involved with Aβ aggregation on the brain SLB and less α-helix, less β-sheet and more random coil structures were found in large plaque-like Aβ aggregates.
Collapse
Affiliation(s)
- Hyojin Lee
- Department of Chemistry, Seoul National University, 559 Gwanak-ro, Gwanak-gu, Seoul, 151-747, South Korea
| | | | | | | |
Collapse
|
122
|
Fan W, Lee YH, Pedireddy S, Zhang Q, Liu T, Ling XY. Graphene oxide and shape-controlled silver nanoparticle hybrids for ultrasensitive single-particle surface-enhanced Raman scattering (SERS) sensing. NANOSCALE 2014; 6:4843-51. [PMID: 24664184 DOI: 10.1039/c3nr06316j] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Graphene oxide (GO) is an emerging material for surface-enhanced Raman scattering (SERS) due to its strong chemical enhancement. Studying the SERS performance of plasmonic nanoparticle/GO hybrid materials at the single particle level is crucial for direct probing of the chemical effect of GO on plasmonic nanoparticles. In this work, we integrate GO and shape-controlled Ag nanoparticles to create hybrid nanomaterials, and the chemical enhancement arising from GO is investigated using single-particle SERS measurements. Ag nanoparticle@GO hybrid nanostructures are prepared by assembling Ag nanoparticles, including spheres, cubes and octahedra with GO sheets. The SERS behaviors of the hybrid nanostructures are characterized, and 2-3 times enhanced SERS intensities are detected from the Ag nanoparticle@GO hybrid nanostructures as compared to pure Ag nanoparticles. Furthermore, we probe the mechanism of SERS enhancement in the hybrid nanostructures by changing the surface coverage of GO on Ag octahedra, by using reduced GO in place of GO as well as by using probe molecules of different electronegativities. This hybrid system is an excellent candidate for single-particle SERS sensors. Sub-nanomolar levels of aromatic molecules are detected using a single Ag/GO hybrid nanomaterial. This as-prepared GO and shape-controlled Ag nanoparticle hybrid is capable of serving as a high performance SERS platform, providing new opportunities for efficient chemical and biological sensing applications.
Collapse
Affiliation(s)
- Wei Fan
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.
| | | | | | | | | | | |
Collapse
|
123
|
Zheng J, He L. Surface-Enhanced Raman Spectroscopy for the Chemical Analysis of Food. Compr Rev Food Sci Food Saf 2014; 13:317-328. [DOI: 10.1111/1541-4337.12062] [Citation(s) in RCA: 243] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Accepted: 01/21/2014] [Indexed: 01/12/2023]
Affiliation(s)
- Jinkai Zheng
- Dept. of Food Science; Univ. of Massachusetts; Amherst MA 01003 U.S.A
- Inst. of Agro-products Processing Science and Technology; Chinese Academy of Agricultural Sciences; Beijing 100193 China
| | - Lili He
- Dept. of Food Science; Univ. of Massachusetts; Amherst MA 01003 U.S.A
| |
Collapse
|
124
|
Sharma Y, Dhawan A. Hybrid nanoparticle-nanoline plasmonic cavities as SERS substrates with gap-controlled enhancements and resonances. NANOTECHNOLOGY 2014; 25:085202. [PMID: 24492249 DOI: 10.1088/0957-4484/25/8/085202] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We present hybrid nanoline-nanoparticle plasmonic substrates which allow easily achievable sub-5 nm gaps and a possibility of large-area fabrication. These substrates--based on plasmonic nanocavities formed by arrays of plasmonic nanoparticle (NP) dimers lying inside periodic metal nanolines (NLs)--can be used as tunable surface enhanced Raman scattering (SERS) substrates due to the tunability of cavity modes in the gap regions. Theoretical studies were conducted, using finite difference time domain (FDTD) modeling, to understand the plasmon resonance tunability as a function of gaps in these hybrid plasmonic substrates. The gaps forming the nanocavities include those between nanolines and nanoparticles (NL-NP) and between two nanoparticles (NP-NP). Our analysis reveals that these gaps play a combined role in tuning the resonance wavelength and the magnitude of electromagnetic field enhancement. Moreover, distinct structure-dependent plasmon resonance peaks are present in addition to material-dependent resonance peaks characteristic to the metal involved. Replacing the spherical particle arrays inside the nanolines with nanorod arrays revealed the possibility of tuning the plasmon resonance in the near-infrared regime. This indicates that there is a possibility of tuning the plasmon resonance wavelength to any region of the visible or near-infrared spectrum by changing the size or shape of the particles assembled inside these plasmonic nanolines.
Collapse
Affiliation(s)
- Yashna Sharma
- Department of Electrical Engineering, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi-110016, India
| | | |
Collapse
|
125
|
A new spectroscopic protocol for selective detection of water soluble sulfides and cyanides: Use of Ag-nanoparticles synthesized by Ag(I)–reduction via photo-degradation of azo-food-colorants. J Photochem Photobiol A Chem 2014. [DOI: 10.1016/j.jphotochem.2013.10.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
126
|
Fang C, Shapter JG, Voelcker NH, Ellis AV. Electrochemically prepared nanoporous gold as a SERS substrate with high enhancement. RSC Adv 2014. [DOI: 10.1039/c4ra01909a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Gold films were electrochemically etched into nanoporous substrates with tuneable pore sizes down to approximately 2 nm. The SERS enhancement as a result of changes in valley and ligament widths of the nanoporous gold was investigated. Compared to the conventional de-alloyed nano-gold, the etched gold showed a lower limit of detection (2 × 10−9 M vs. 1 × 10−7 M Rhodamine 6G).
Collapse
Affiliation(s)
- Cheng Fang
- Flinders Centre for Nanoscale Science and Technology
- School of Chemical and Physical Sciences
- Flinders University
- Adelaide SA5042, Australia
| | - Joseph George Shapter
- Flinders Centre for Nanoscale Science and Technology
- School of Chemical and Physical Sciences
- Flinders University
- Adelaide SA5042, Australia
| | | | - Amanda Vera Ellis
- Flinders Centre for Nanoscale Science and Technology
- School of Chemical and Physical Sciences
- Flinders University
- Adelaide SA5042, Australia
| |
Collapse
|
127
|
Ou KL, Hsu TC, Liu YC, Yang KH, Tsai HY. Silver overlayer-modified surface-enhanced Raman scattering-active gold substrates for potential applications in trace detection of biochemical species. Anal Chim Acta 2014; 806:188-96. [DOI: 10.1016/j.aca.2013.11.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 11/07/2013] [Accepted: 11/14/2013] [Indexed: 11/24/2022]
|
128
|
Mai FD, Yu CC, Liu YC, Chang CC, Yang KH. Highly effective surface-enhanced Raman scattering-active gold substrates prepared by using electrochemical methods in the presence of hexadecyltrimethylammonium bromide. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2013.11.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
129
|
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.
Collapse
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
| |
Collapse
|
130
|
Dual-mode tracking of tumor-cell-specific drug delivery using fluorescence and label-free SERS techniques. Biosens Bioelectron 2014; 51:82-9. [DOI: 10.1016/j.bios.2013.07.034] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 07/17/2013] [Accepted: 07/19/2013] [Indexed: 12/21/2022]
|
131
|
Wang H, Schultz ZD. The chemical origin of enhanced signals from tip-enhanced Raman detection of functionalized nanoparticles. Analyst 2013; 138:3150-7. [PMID: 23423552 DOI: 10.1039/c3an36898j] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Here we present results that investigate the origins of signals observed in tip-enhanced Raman (TERS) measurements of functionalized nanoparticles. Surface enhanced Raman scattering (SERS) is known to give the largest enhancements in gap junctions. Similarly, gap-mode TERS also produces significant enhancements. The methodology developed here provides gap-mode like enhancements in TERS measurements without the need for a metal surface. Using a combination of aggregated nanoparticle SERS and TERS detection of functionalized nanoparticles, we assess the chemical origins of the observed peaks and show that molecules outside of gap junctions are also enhanced using our methodology. Our experiments use biotin and streptavidin as a model system for protein-ligand binding. Different size functionalized nanoparticles (20, 50, 80 nm) show changes in intensity in both SERS and TERS measurements. SERS measurements indicate that streptavidin has a larger Raman cross-section than biotin and is preferentially observed. The specific streptavidin peaks observed by TERS vary depending on whether streptavidin is attached to the nanoparticle and located in the gap or bound to the substrate surface. This methodology suggests a route to enhancing TERS signals associated with protein receptors in biological systems that cannot be isolated to a metallic surface.
Collapse
Affiliation(s)
- Hao Wang
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
| | | |
Collapse
|
132
|
|
133
|
Han S, Hong S, Li X. Effects of cations and anions as aggregating agents on SERS detection of cotinine (COT) and trans-3′-hydroxycotinine (3HC). J Colloid Interface Sci 2013; 410:74-80. [DOI: 10.1016/j.jcis.2013.07.066] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2013] [Revised: 07/30/2013] [Accepted: 07/31/2013] [Indexed: 11/26/2022]
|
134
|
Xia X, Rycenga M, Qin D, Xia Y. Silver nanocube on gold microplate as a well-defined and highly active substrate for SERS detection. JOURNAL OF MATERIALS CHEMISTRY. C 2013; 1:10.1039/C3TC30707G. [PMID: 24187611 PMCID: PMC3811944 DOI: 10.1039/c3tc30707g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Strong enhancement and good reproducibility in Raman signals are two major requirements for a surface-enhanced Raman scattering (SERS) substrate to be used for sensitive detection of an analyte. Here we report a new type of SERS substrate that was fabricated by depositing a Ag nanocube (AgNC) on the surface of a Au microplate (AuMP). Owing to the strong and reproducible hot spots formed at corner sites of the AgNC in proximity with the AuMP surface, the new substrate showed high sensitivity and reproducibility. Using 1,4-benzenedithiol as a probe, the SERS enhancement factor of a typical "AgNC on AuMP" substrate could reach a level as high as 4.7×107. In addition to the high sensitivity and reproducibility, the "AgNC on AuMP" substrate also displayed very good stability. Potential use of the "AgNC on AuMP" substrate was demonstrated by detecting crystal violet with high sensitivity.
Collapse
Affiliation(s)
- Xiaohu Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, USA
| | - Matthew Rycenga
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA
| | - Dong Qin
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, USA
- School of Chemistry and Biochemistry and School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| |
Collapse
|
135
|
Cecchini MP, Wiener A, Turek VA, Chon H, Lee S, Ivanov AP, McComb DW, Choo J, Albrecht T, Maier SA, Edel JB. Rapid ultrasensitive single particle surface-enhanced Raman spectroscopy using metallic nanopores. NANO LETTERS 2013; 13:4602-9. [PMID: 24021086 DOI: 10.1021/nl402108g] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Nanopore sensors embedded within thin dielectric membranes have been gaining significant interest due to their single molecule sensitivity and compatibility of detecting a large range of analytes, from DNA and proteins, to small molecules and particles. Building on this concept we utilize a metallic Au solid-state membrane to translocate and rapidly detect single Au nanoparticles (NPs) functionalized with 589 dye molecules using surface-enhanced resonance Raman spectroscopy (SERRS). We show that, due to the plasmonic coupling between the Au metallic nanopore surface and the NP, signal intensities are enhanced when probing analyte molecules bound to the NP surface. Although not single molecule, this nanopore sensing scheme benefits from the ability of SERRS to provide rich vibrational information on the analyte, improving on current nanopore-based electrical and optical detection techniques. We show that the full vibrational spectrum of the analyte can be detected with ultrahigh spectral sensitivity and a rapid temporal resolution of 880 μs.
Collapse
Affiliation(s)
- Michael P Cecchini
- Department of Chemistry, Imperial College London , South Kensington Campus, London, SW7 2AZ, United Kingdom
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
136
|
Yu P, Huang J, Yuan CT, Tang J. Synthesis of Silver Nanoprisms and Nanodiscs an Applications in Fluorescence Blinking Suppression. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201000076] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
137
|
Lee YC, Chen SJ, Huang CL. Finding a Facile Method to Synthesize Decahedral Silver Nanoparticles through a Systematic Study of Temperature Effect on Photomediated Silver Nanostructure Growth. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201000048] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
138
|
|
139
|
Tan EZ, Yin PG, Guo L. Fabrication of a network structure SERS substrate and the application in ultra-sensitive crystal violet detection. ACTA ACUST UNITED AC 2013. [DOI: 10.1007/s11801-013-3077-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
140
|
Danciu C, Falamas A, Dehelean C, Soica C, Radeke H, Barbu-Tudoran L, Bojin F, Pînzaru SC, Munteanu MF. A characterization of four B16 murine melanoma cell sublines molecular fingerprint and proliferation behavior. Cancer Cell Int 2013; 13:75. [PMID: 23890195 PMCID: PMC3750233 DOI: 10.1186/1475-2867-13-75] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2013] [Accepted: 07/15/2013] [Indexed: 11/13/2022] Open
Abstract
Background One of the most popular and versatile model of murine melanoma is by inoculating B16 cells in the syngeneic C57BL6J mouse strain. A characterization of different B16 modified cell sub-lines will be of real practical interest. For this aim, modern analytical tools like surface enhanced Raman spectroscopy/scattering (SERS) and MTT were employed to characterize both chemical composition and proliferation behavior of the selected cells. Methods High quality SERS signal was recorded from each of the four types of B16 cell sub-lines: B164A5, B16GMCSF, B16FLT3, B16F10, in order to observe the differences between a parent cell line (B164A5) and other derived B16 cell sub-lines. Cells were incubated with silver nanoparticles of 50–100 nm diameter and the nanoparticles uptake inside the cells cytoplasm was proved by transmission electron microscopy (TEM) investigations. In order to characterize proliferation, growth curves of the four B16 cell lines, using different cell numbers and FCS concentration were obtained employing the MTT proliferation assay. For correlations doubling time were calculated. Results SERS bands allowed the identification inside the cells of the main bio-molecular components such as: proteins, nucleic acids, and lipids. An "on and off" SERS effect was constantly present, which may be explained in terms of the employed laser power, as well as the possible different orientations of the adsorbed species in the cells in respect to the Ag nanoparticles. MTT results showed that among the four tested cell sub-lines B16 F10 is the most proliferative and B164A5 has the lower growth capacity. Regarding B16FLT3 cells and B16GMCSF cells, they present proliferation ability in between with slight slower potency for B16GMCSF cells. Conclusion Molecular fingerprint and proliferation behavior of four B16 melanoma cell sub-lines were elucidated by associating SERS investigations with MTT proliferation assay.
Collapse
Affiliation(s)
- Corina Danciu
- Faculty of Pharmacy, University of Medicine and Pharmacy "Victor Babes", EftimieMurgu Square, No. 2, 300041 Timişoara, România
| | - Alexandra Falamas
- Biomedical Physics, Biomedical, Theoretical Physics, and Molecular Spectroscopy Department, Faculty of Physics, Babes-Bolyai University, Kogalniceanu 1, RO 400084 Cluj-Napoca, România
| | - Cristina Dehelean
- Faculty of Pharmacy, University of Medicine and Pharmacy "Victor Babes", EftimieMurgu Square, No. 2, 300041 Timişoara, România
| | - Codruta Soica
- Faculty of Pharmacy, University of Medicine and Pharmacy "Victor Babes", EftimieMurgu Square, No. 2, 300041 Timişoara, România
| | - Heinfried Radeke
- Pharmazentrum Frankfurt/Center for Drug Research, Development and Safety, Clinic of J.W. Goethe University, Theodor-Stern-Kai 7, 60590 Frankfurt, Germany
| | - Lucian Barbu-Tudoran
- Electron Microscopy Center Faculty of Biology & Geology "Babes-Bolyai", University of Cluj-Napoca, 5-7 Clinicilor Street, 400006 Cluj-Napoca, Romania
| | - Florina Bojin
- Department of Physiology and Immunology, University of Medicine and Pharmacy "Victor Babes", Eftimie Murgu Square, No. 2, 300041 Timisoara, Romania
| | - Simona Cîntă Pînzaru
- Biomedical Physics, Biomedical, Theoretical Physics, and Molecular Spectroscopy Department, Faculty of Physics, Babes-Bolyai University, Kogalniceanu 1, RO 400084 Cluj-Napoca, România
| | - Melania F Munteanu
- Department of Clinical Laboratory and Sanitary Chemistry, "Vasile Goldis" University, 1 Feleacului Str., Arad 310396 Romania
| |
Collapse
|
141
|
Lahiri B, Holland G, Aksyuk V, Centrone A. Nanoscale imaging of plasmonic hot spots and dark modes with the photothermal-induced resonance technique. NANO LETTERS 2013; 13:3218-24. [PMID: 23777547 DOI: 10.1021/nl401284m] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The collective oscillation of conduction electrons, responsible for the localized surface plasmon resonances, enables engineering nanomaterials by tuning their optical response from the visible to terahertz as a function of nanostructure size, shape, and environment. While theoretical calculations helped tremendously in understanding plasmonic nanomaterials and optimizing their light matter interaction, only a few experimental techniques are available to study these materials with high spatial resolution. In this work, the photothermal-induced resonance (PTIR) technique is applied for the first time to image the dark plasmonic resonance of gold asymmetric split ring resonators (A-SRRs) in the mid-infrared (IR) spectral region with nanoscale resolution. Additionally, the chemically specific PTIR signal is used to map the local absorption enhancement of poly(methyl methacrylate) coated on A-SRRs, revealing hot spots with local enhancement factors up to ≈30 at 100 nm lateral resolution. We argue that PTIR nanoscale characterization will facilitate the engineering and application of plasmonic nanomaterials for mid-IR applications.
Collapse
Affiliation(s)
- Basudev Lahiri
- Center for Nanoscale Science and Technology, National Institute Standards and Technology , Gaithersburg, 100 Bureau Drive, Maryland 20899, United States
| | | | | | | |
Collapse
|
142
|
Willets KA. New Tools for Investigating Electromagnetic Hot Spots in Single‐Molecule Surface‐Enhanced Raman Scattering. Chemphyschem 2013; 14:3186-95. [DOI: 10.1002/cphc.201300297] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 05/01/2013] [Indexed: 01/12/2023]
Affiliation(s)
- Katherine A. Willets
- Department of Chemistry, University of Texas at Austin, Welch Hall 1.202,105 E 24th ST, A5300, Austin TX 78712 (USA), Fax: (+1) 512‐471‐0985
| |
Collapse
|
143
|
Ultrasensitive Determination of Rutin on Ag Nanoparticles- Poly(p-aminobenzene sulfonic acid)/Graphene Modified Glassy Carbon Electrode. ACTA ACUST UNITED AC 2013. [DOI: 10.4028/www.scientific.net/amr.709.45] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Ag nanoparticles-Poly(p-aminobenzene sulfonic acid)/graphene modified glassy carbon electrode (AgNPs-PABSA/GR/GCE) was fabricated by electrodepositon of AgNPs-PABSA onto graphene modified glassy carbon electrode (GR/GCE). The reported method was simple and fast. Combining the advantages of GR (high surface area and good conductivity), AgNPs (excellent electronic conductivities) and PABSA (the ability to interact with many components through hydrophobic or π–π electronic interaction), the AgNPs-PABSA/GR modified electrode effectively improved the sensitivity for the determination of rutin.
Collapse
|
144
|
Xia L, Yang Z, Yin S, Guo W, Li S, Xie W, Huang D, Deng Q, Shi H, Cui H, Du C. Surface enhanced Raman scattering substrate with metallic nanogap array fabricated by etching the assembled polystyrene spheres array. OPTICS EXPRESS 2013; 21:11349-11355. [PMID: 23669991 DOI: 10.1364/oe.21.011349] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A sensitive surface enhanced Raman scattering (SERS) substrate with metallic nanogap array (MNGA) is fabricated by etching of an assembled polystyrene (PS) spheres array, followed by the coating of a metal film. The substrate is reproducible in fabrication and sensitive due to the nanogap coupling resonance (NGCR) enhancement. The NGCR is analyzed with the finite difference time domain (FDTD) method, and the relationship between the gap parameter and the field enhancement is obtained. Experimental measurements of R6G on demonstrate that the enhancement factor (EF) of the MNGA SERS substrate is increased by more than two fold compared with the control sample.
Collapse
Affiliation(s)
- Liangping Xia
- Chongqing institute of green and intelligent technology, Chinese Academy of Sciences, Chongqing, 401122, China
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
145
|
Chang CC, Yu CC, Liu YC, Yang KH. Al2O3-modified surface-enhanced Raman scattering-active gold nanoparticles on substrates by using sonoelectrochemical pulse deposition. J Electroanal Chem (Lausanne) 2013. [DOI: 10.1016/j.jelechem.2013.03.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
146
|
Fabrication of free-standing and flexible silver nanoparticle-graphene films and their surface-enhanced Raman scattering activity. MONATSHEFTE FUR CHEMIE 2013. [DOI: 10.1007/s00706-013-0987-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
147
|
Thorough tuning of the aspect ratio of gold nanorods using response surface methodology. Anal Chim Acta 2013; 779:14-21. [PMID: 23663667 DOI: 10.1016/j.aca.2013.03.056] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Revised: 03/07/2013] [Accepted: 03/22/2013] [Indexed: 11/20/2022]
Abstract
In the present work a central composite design based on response surface methodology (RSM) is employed for fine tuning of the aspect ratios of seed-mediated synthesized gold nanorods (GNRs). The relations between the affecting parameters, including ratio of l-ascorbic acid to Au(3+) ions, concentrations of silver nitrate, CTAB, and CTAB-capped gold seeds, were explored using a RSM model. It is observed that the effect of each parameter on the aspect ratio of developing nanorods highly depends on the value of the other parameters. The concentrations of silver ions, ascorbic acid and seeds are found to have a high contribution in controlling the aspect ratios of NRs. The optimized parameters led to a high yield synthesis of gold nanorods with an ideal aspect ratio ranging from 1 (spherical particle) to 4.9. In addition, corresponding tunable surface Plasmon absorption band has been extended to 880 nm. The resulted nanorods were characterized by UV-visible spectrometry and transmission electron microscopy.
Collapse
|
148
|
Cheng ML, Yang J. Probing Surface Enhancement Effect of Molecules On/Between Silver Nanoparticles in Surface Enhanced Raman Scattering. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201200416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
149
|
Beta-cyclodextrin decorated nanostructured SERS substrates facilitate selective detection of endocrine disruptorchemicals. Biosens Bioelectron 2013; 42:632-9. [DOI: 10.1016/j.bios.2012.10.075] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Revised: 10/12/2012] [Accepted: 10/24/2012] [Indexed: 11/24/2022]
|
150
|
Systematic preparation of colloidal silver nanoparticles for effective SERS substrates. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.01.036] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|