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Huang J, Chen Q, Shang Z, Lu J, Wang Z, Chen Q, Liang P. Fabrication of silver nanostructure array patterns (SNAPs) on silicon wafer for highly sensitive and reliable SERS substrates. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 310:123914. [PMID: 38266600 DOI: 10.1016/j.saa.2024.123914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 12/21/2023] [Accepted: 01/17/2024] [Indexed: 01/26/2024]
Abstract
Metal nanostructure arrays with large amounts of nano-gaps are important for surface enhanced Raman scattering applications, though the fabrications of such nanostructures are difficult due to the complex and multiple synthetic steps. In this research, we report silver nanostructure array patterns (SNAPs) on silicon wafer, which is fabricated with semiconductor manufacturing technology, Cu2O electrochemistry deposition, and Ag In-situ oxidation-reduction growth. Benefiting from the dense and uniform distribution of Ag nanowires, the fabricated SNAPs demonstrate a very strong and uniform surface-enhanced Raman scattering (SERS) effect. The efficiency of SNAPs was investigated by using rhodamine 6G (R6G) dye as an analyte molecule. The results show that the minimum detectable concentration of R6G can reach as low as 10-11 M, and the Raman signals in the random region show good signal homogeneity with a low relative standard deviation (RSD) of 4.77 %. These results indicate that the SNAPs perform a great sensitivity and uniformity as a SERS substrate. Furthermore, we used the SNAPs substrate to detect antibiotic sulfadiazine. The main peaks in sulfadiazine Raman and vibration modes assignments were obtained and the quantitative analysis model was established by principal component analysis (PCA). The detection and application results of sulfadiazine indicate that the SNAPs substrate can be applied for trace detection of antibiotics. In addition, we have cited the application of the SNAPs substrate in anti-counterfeiting labels. These practical applications demonstrate that the fabricated SNAPs can potentially provide a way to develop low-cost SERS platforms for environmental detections, biomedicine analysis, and commodities anti-counterfeiting.
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Affiliation(s)
- Jie Huang
- College of Optical and Electronic Technology, China Jiliang University, 310018 Hangzhou, China
| | - Qing Chen
- College of Optical and Electronic Technology, China Jiliang University, 310018 Hangzhou, China
| | - Ziyang Shang
- College of Optical and Electronic Technology, China Jiliang University, 310018 Hangzhou, China
| | - Jinqiao Lu
- College of Optical and Electronic Technology, China Jiliang University, 310018 Hangzhou, China
| | - Zhen Wang
- College of Optical and Electronic Technology, China Jiliang University, 310018 Hangzhou, China
| | - Qiang Chen
- College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310000, China
| | - Pei Liang
- College of Optical and Electronic Technology, China Jiliang University, 310018 Hangzhou, China.
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2
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Lei L, Sang L, Gao Y. Pulse electrodeposition of Ag, Cu nanoparticles on TiO2 nanoring/nanotube arrays for enhanced photoelectrochemical water splitting. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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3
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Kaja S, Nag A. Bimetallic Ag-Cu Alloy Microflowers as SERS Substrates with Single-Molecule Detection Limit. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:13027-13037. [PMID: 34699226 DOI: 10.1021/acs.langmuir.1c02119] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Bimetallic Ag-Cu alloy microflowers with tunable surface compositions were fabricated as surface-enhanced Raman spectroscopy (SERS) substrates with a limit of detection in the zeptomolar range for the analyte molecule rhodamine 6G (R6G). The substrates were prepared on a glass coverslip through a bottom-up strategy by simple thermolysis of metal-alkyl ammonium halide precursors. The reaction temperature and composition of the alloy were varied sequentially to find out the maximum SERS efficiency from the substrates. While UV-vis spectroscopy was employed to characterize the optical properties of the substrates, the bulk and surface compositions of the microflowers were determined using energy-dispersive X-ray fluorescence (ED-XRF) and X-ray photoelectron spectroscopy (XPS) techniques, respectively. Also, the structural and morphological characterizations of the substrates were performed by X-ray diffraction and scanning electron microscope (SEM), respectively. For alloys, the ED-XRF studies confirmed that the bulk compositions matched with the feed ratio, while the surface compositions were found to be rich in copper in the form of both elementary copper and copper oxide, as revealed by XPS studies. From the efficiency studies for different compositions prepared, it was found that 10% Ag-Cu alloy microflowers produced the maximum SERS intensity for resonant R6G molecules as probes. In fact, R6G evidences a 50-fold enhancement in SERS spectra with 10% alloy microflowers as against pure Ag microflowers. Using 1, 2, 3-benzotriazole as a nonresonant Raman probe, uniform enhancement factors on the order of ≈108 were achieved from different parts of the 10% Ag-Cu alloy microflower. The same substrate showed excellent Raman response for detecting R6G at very low concentrations such as 10 zM, leading to detection and analysis of SERS spectra from a single R6G molecule.
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Affiliation(s)
- Sravani Kaja
- Department of Chemistry, Birla Institute of Technology and Science (BITS) Pilani, Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Hyderabad 500078, India
| | - Amit Nag
- Department of Chemistry, Birla Institute of Technology and Science (BITS) Pilani, Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Hyderabad 500078, India
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4
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Medvedeva XV, Li F, Maokhamphiou A, Medvedev JJ, Ahmed A, Klinkova A. Shape control in seed-mediated synthesis of non-elongated Cu nanoparticles and their optical properties. NANOSCALE 2021; 13:12505-12512. [PMID: 34231611 DOI: 10.1039/d1nr01358k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Shape and surface chemistry control in copper nanoparticle synthesis is an important research area due to a wide range of developing applications of this material in catalysis, energy conversion, sensing and many others. In addition to being an inexpensive and abundant metal, copper is an attractive photocatalyst due to its optical properties in the visible range. Here, we report a facile, tunable and sustainable methodology for synthesizing Pd-seeded Cu nanoparticles with various shapes, including cubes, spheres, raspberry-like particles and cages stabilized with a bilayer of a cationic surfactant in aqueous media. The experimental and theoretical examination of the optical response in the series of synthesized nanoparticles revealed that the low-energy extinction peak is associated with electronic interband transitions in the metal, in contrast to a widely spread attribution of this peak to a plasmonic response in Cu nanoparticles.
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Affiliation(s)
- Xenia V Medvedeva
- Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada.
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Mureed S, Naz S, Haider A, Raza A, Ul-Hamid A, Haider J, Ikram M, Ghaffar R, Irshad M, Ghaffar A, Saeed A. Development of Multi-concentration Cu:Ag Bimetallic Nanoparticles as a Promising Bactericidal for Antibiotic-Resistant Bacteria as Evaluated with Molecular Docking Study. NANOSCALE RESEARCH LETTERS 2021; 16:91. [PMID: 34021844 PMCID: PMC8141091 DOI: 10.1186/s11671-021-03547-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Accepted: 05/13/2021] [Indexed: 06/12/2023]
Abstract
The present study is concerned with evaluating the influence of various concentrations of Ag within Cu:Ag bimetallic nanoparticles developed for use as a promising anti-bacterial agent against antibiotic-resistant bacteria. Here, Cu:Ag bimetallic nanoparticles with various concentration ratios (2.5, 5.0, 7.5, and 10 wt%) of Ag in fixed amount of Cu labeled as 1:0.025, 1:0.050, 1:0.075, and 1:0.1 were synthesized using co-precipitation method with ammonium hydroxide and deionized water as solvent, polyvinyl pyrrolidone as a capping agent, and sodium borohydride and ascorbic acid as reducing agents. These formulated products were characterized through a variety of techniques. XRD confirmed phase purity and detected the presence of distinct fcc structures belonging to Cu and Ag phases. FTIR spectroscopy confirmed the presence of vibrational modes corresponding to various functional groups and recorded characteristic peak emanating from the bimetallic. UV-visible spectroscopy revealed reduction in band gap with increasing Ag content. SEM and HR-TEM micrographs revealed spherical morphology of Ag-doped Cu bimetallic with small and large scale agglomerations. The samples exhibited varying dimensions and interlayer spacing. Bactericidal action of synthesized Cu:Ag bimetallic NPs depicted statistically significant (P < 0.05) inhibition zones recorded for various concentrations of Ag dopant against Staphylococcus aureus (S. aureus), Escherichia coli (E. coli), and Acinetobacter baumannii (A. baumannii) ranging from (0.85-2.8 mm), (0.55-1.95 mm) and (0.65-1.85 mm), respectively. Broadly, Cu:Ag bimetallic NPs were found to be more potent against gram-positive compared with gram-negative. Molecular docking study of Ag-Cu bimetallic NPs was performed against β-lactamase which is a key enzyme of cell wall biosynthetic pathway from both S. aureus (Binding score: - 4.981 kcal/mol) and A. bauminnii (Binding score: - 4.013 kcal/mol). Similarly, binding interaction analysis against FabI belonging to fatty acid biosynthetic pathway from A. bauminnii (Binding score: - 3.385 kcal/mol) and S. aureus (Binding score: - 3.012 kcal/mol) along with FabH from E. coli (Binding score: - 4.372 kcal/mol) was undertaken. These theoretical computations indicate Cu-Ag bimetallic NPs as possible inhibitor of selected enzymes. It is suggested that exploring in vitro inhibition potential of these materials may open new avenues for antibiotic discovery.
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Affiliation(s)
- Shumaila Mureed
- Solar Cell Applications Research Lab, Department of Physics, Government College University Lahore, Lahore, 54000, Punjab, Pakistan
- Department of Physics, Government College University Lahore, Lahore, 54000, Punjab, Pakistan
| | - Sadia Naz
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Ali Haider
- Department of Clinical Medicine and Surgery, University of Veterinary and Animal Sciences, Lahore, 54000, Punjab, Pakistan
| | - Ali Raza
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University, 14 Ali Road, Lahore, Pakistan
| | - Anwar Ul-Hamid
- Core Research Facilities, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia.
| | - Junaid Haider
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Muhammad Ikram
- Solar Cell Applications Research Lab, Department of Physics, Government College University Lahore, Lahore, 54000, Punjab, Pakistan.
| | - Rabia Ghaffar
- Division of Science and Technology, Department of Botany, University of Education, Lahore, 54000, Pakistan
| | - Muneeb Irshad
- Department of Physics, University of Engineering and Technology, Lahore, 54890, Pakistan
| | - Abdul Ghaffar
- Department of Physics, Government College University Lahore, Lahore, 54000, Punjab, Pakistan
| | - Aamer Saeed
- Department of Chemistry, Quaid-I-Azam University, Islamabad, 45320, Pakistan
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6
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Wang Q, Wang J, Li M, Ge Z, Zhang X, Luan L, Li P, Xu W. Size-dependent surface enhanced Raman scattering activity of plasmonic AuNS@AgNCs for rapid and sensitive detection of Butyl benzyl phthalate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 248:119131. [PMID: 33279408 DOI: 10.1016/j.saa.2020.119131] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 10/14/2020] [Accepted: 10/22/2020] [Indexed: 06/12/2023]
Abstract
Phthalate plasticizers (PAEs) are heavily applied to plastic products and poses severe threat to human health. Herein, it is especially urgent to find a stable and reliable method for detecting PAEs. In this report, a Surface Enhanced Raman Scatting (SERS) strategy coupled with plasmonic core-shell Au nanospheres@Ag nanocubes (AuNS@AgNCs) as substrates were employed for the rapid and sensitive detection of Butyl benzyl phthalate (BBP) in liquor samples, and plasmonic core-shell AuNS@AgNCs tend to perform richer localized surface plasmon resonance (LSPR) than AuNS. In this work, different sizes AuNS@AgNCs comprised of Au nanospheres as core and Ag nanocubes as shells were synthesized. Based on this, we then investigated the SERS activity of BBP and crystal violet (CV) reached a maximum level when the thickness of Ag coating shell arrived in a threshold, and even very low signal of trace BBP dissolved in liquor sample can be detected in existence of the plasmonic AuNS@AgNCs active substrate of 50 nm. The sensitivity and repeatability of the optimized size AuNs@AgNCs have been estimated and limits of detection (LOD) was 10-9 M for BBP. In addition, finite difference time domain (FDTD) electromagnetic simulations also performed in great agreement with our experimental results.
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Affiliation(s)
- Qianqian Wang
- Department of Pharmacy, Anhui University of Chinese Medicine, Anhui, Hefei 230038, China
| | - Juan Wang
- Department of Pharmacy, Anhui University of Chinese Medicine, Anhui, Hefei 230038, China
| | - Man Li
- The First Affiliated Hospital of USTC, Division of Life Science and Medicine, University of Science and Technology of China, Hefei, Anhui 230001, China
| | - Zipan Ge
- Department of Pharmacy, Anhui University of Chinese Medicine, Anhui, Hefei 230038, China
| | - Xiang Zhang
- The First Affiliated Hospital of USTC, Division of Life Science and Medicine, University of Science and Technology of China, Hefei, Anhui 230001, China
| | - Longlong Luan
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Anhui, Hefei 230009, China
| | - Pan Li
- Institute of Health & Medical Technology Hefei Institutes of Physical Science, CAS, Hefei 230021, China.
| | - Weiping Xu
- The First Affiliated Hospital of USTC, Division of Life Science and Medicine, University of Science and Technology of China, Hefei, Anhui 230001, China.
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7
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Höller RPM, Jahn IJ, Cialla-May D, Chanana M, Popp J, Fery A, Kuttner C. Biomacromolecular-Assembled Nanoclusters: Key Aspects for Robust Colloidal SERS Sensing. ACS APPLIED MATERIALS & INTERFACES 2020; 12:57302-57313. [PMID: 33306362 DOI: 10.1021/acsami.0c16398] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Superstructures of gold nanospheres offer augmented surface-enhanced Raman scattering (SERS) activities beyond the limits of their individual building blocks. However, for application as reliable and quantitative colloidal SERS probes, some key aspects need to be considered to combine efficiency and robustness with respect to hotspot excitation, analyte adsorption, signal stability, and colloidal stability. For this purpose, we studied core/satellite superstructures with spherical cores as a simple optically isotropic model system. Superstructures of different core sizes were assembled using bovine serum albumin (BSA), which serves as a non-specific biomacromolecular linker and provides electrosteric stabilization. We show that the "noisy" spectral footprint of the protein coating may serve as an internal standard, which allows accurate monitoring of the adsorption kinetics of analytes. The SERS activity was quantified using 4-mercaptobenzoic acid (MBA) as an aromatic low-molecular-weight model analyte. The molar SERS efficiency was studied by variation of the particle (Au0) and analyte concentrations with a limit of detection of 10-7 M MBA. The practical importance of colloidal stability for robust measurement conditions was demonstrated by comparing the superstructures with their citrate-stabilized or protein-coated building blocks. We explain the theoretical background of hotspot formation by a leader/follower relationship of asymmetric control between the core and the satellites and give practical guidelines for robust colloidal SERS sensing probes.
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Affiliation(s)
- Roland P M Höller
- Leibniz-Institut für Polymerforschung Dresden e.V., Institute of Physical Chemistry and Polymer Physics, Hohe Str. 6, 01069 Dresden, Germany
| | - Izabella J Jahn
- Leibniz Institute of Photonics Technology (IPHT), Member of the Research Alliance "Leibniz Health Technologies", Albert-Einstein-Str. 9, 07745 Jena, Germany
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
- InfectoGnostics Research Campus Jena, Centre for Applied Research, Philosophenweg 7, 07743 Jena, Germany
| | - Dana Cialla-May
- Leibniz Institute of Photonics Technology (IPHT), Member of the Research Alliance "Leibniz Health Technologies", Albert-Einstein-Str. 9, 07745 Jena, Germany
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
- InfectoGnostics Research Campus Jena, Centre for Applied Research, Philosophenweg 7, 07743 Jena, Germany
| | - Munish Chanana
- Swiss Wood Solutions AG, Überlandstr. 129, 8600 Dübendorf, Switzerland
| | - Jürgen Popp
- Leibniz Institute of Photonics Technology (IPHT), Member of the Research Alliance "Leibniz Health Technologies", Albert-Einstein-Str. 9, 07745 Jena, Germany
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
- InfectoGnostics Research Campus Jena, Centre for Applied Research, Philosophenweg 7, 07743 Jena, Germany
| | - Andreas Fery
- Leibniz-Institut für Polymerforschung Dresden e.V., Institute of Physical Chemistry and Polymer Physics, Hohe Str. 6, 01069 Dresden, Germany
- Physical Chemistry of Polymeric Materials, Technische Universität Dresden, Hohe Str. 6, 01069 Dresden, Germany
- Cluster of Excellence Centre for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, 01062 Dresden, Germany
| | - Christian Kuttner
- Leibniz-Institut für Polymerforschung Dresden e.V., Institute of Physical Chemistry and Polymer Physics, Hohe Str. 6, 01069 Dresden, Germany
- Cluster of Excellence Centre for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, 01062 Dresden, Germany
- CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), Paseo de Miramón 182, 20014 Donostia-San Sebastián, Spain
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8
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Peng Y, Qin L, Liu J, Kang SZ, Li G, Li X. Facile synthesis and bi-functionality of mesoporous TiO2 implanted with AgCu alloy. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.03.057] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Satya Bharati MS, Chandu B, Rao SV. Explosives sensing using Ag-Cu alloy nanoparticles synthesized by femtosecond laser ablation and irradiation. RSC Adv 2019; 9:1517-1525. [PMID: 35518042 PMCID: PMC9059630 DOI: 10.1039/c8ra08462a] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 01/08/2019] [Indexed: 12/18/2022] Open
Abstract
Herein we demonstrate the synthesis of Ag-Cu alloy NPs through a consecutive two-step process; laser ablation followed by laser irradiation. Initially, pure Ag and Cu NPs were produced individually using the laser ablation in liquid technique (with ∼50 femtosecond pulses at 800 nm) which was followed by laser irradiation of the mixed Ag and Cu NPs in equal volume. These Ag, Cu, and Ag-Cu NPs were characterised by UV-visible absorption, HRTEM and XRD techniques. The alloy formation was confirmed by the presence of a single surface plasmon resonance peak in absorption spectra and elemental mapping using FESEM techniques. Furthermore, the results from surface enhanced Raman scattering (SERS) studies performed for the methylene blue (MB) molecule suggested that Ag-Cu alloy NPs demonstrate a higher enhancement factor (EF) compared to pure Ag/Cu NPs. Additionally, SERS studies of Ag-Cu alloy NPs were implemented for the detection of explosive molecules such as picric acid (PA - 5 μM), ammonium nitrate (AN - 5 μM) and the dye molecule methylene blue (MB - 5 nM). These alloy NPs exhibited superiority in the detection of various analyte molecules with good reproducibility and high sensitivity with EFs in the range of 104 to 107.
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Affiliation(s)
- Moram Sree Satya Bharati
- Advanced Centre for Research in High Energy Materials (ACRHEM), University of Hyderabad Prof. C. R. Rao Road Hyderabad 500046 Telangana India
| | - Byram Chandu
- Advanced Centre for Research in High Energy Materials (ACRHEM), University of Hyderabad Prof. C. R. Rao Road Hyderabad 500046 Telangana India
| | - S Venugopal Rao
- Advanced Centre for Research in High Energy Materials (ACRHEM), University of Hyderabad Prof. C. R. Rao Road Hyderabad 500046 Telangana India
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10
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Farooq U, Danish M, Lu S, Brusseau ML, Naqvi M, Fu X, Zhang X, Sui Q, Qiu Z. Efficient transformation in characteristics of cations supported-reduced graphene oxide nanocomposites for the destruction of trichloroethane. APPLIED CATALYSIS. A, GENERAL 2017; 544:10-20. [PMID: 29353964 PMCID: PMC5772953 DOI: 10.1016/j.apcata.2017.07.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Experiments were conducted to investigate the use of graphene-oxide supported metallic nanocomposites for improving the degradation of trichloroethane (TCA) by sodium percarbonate (SPC). Two methods of production, chemical reduction (CR) and solvo-thermal (ST), were tested for preparation of single (Fe) and binary (Fe-Cu) nanocomposites supported by reduced graphene oxide (rGO). A variety of analytical techniques including N2 adsorption Brunauer-Emmett-Teller (BET), x-ray diffraction (XRD), fourier-transfrom infrared spectroscopy (FTIR), and transmisison electron microscopy (TEM) were applied to characterize the physicochemical and microstructural properties of the synthesized nanocomposites. The characterization indicated that the CR method produced nanocomposites that comprised only mesoporous structure. Conversely, both micro and mesoporous structures were present for samples produced with the ST method. The synthesized single and bimetallic composites produced from the ST method showed higher surface areas, i.e. 93.6 m2/g and 119.2 m2/g as compared to the ones synthesized via the CR method, i.e. 13.8 m2/g and 38.0 m2/g respectively. The results of FTIR and XRD analyses confirmed that the ST method produced highly crystalline nanocomposites. SEM and TEM analysis validated that metallic particles with definite morphology well distributed on the surface of rGO. X-ray photoelectron spectroscopy (XPS) analysis confirmed the homogeneity nanocomposites and occurrence of variation in copper oxidation states during degradation process. EDS mapping validate the homogeneous distribution of Cu and Fe at reduced graphene oxide surface. The Fe-Cu/rGO (ST) activated SPC system effectively degraded TCA (92%) in 2.5 h at low nanocomposite dose compared to the Fe-Cu/rGO (CR) and only Fe, for which the maximum degradation efficiencies achieved were 81% and 34%. In conclusion, excellent catalytic characteristics were observed for the ST-synthesized single and bimetallic (Fe/rGO, Fe-Cu/rGO) catalysts. These catalysts were successful in improving the degradation of TCA via activated SPC.
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Affiliation(s)
- Usman Farooq
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Muhammad Danish
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
- Department of Chemical Engineering, NFC Institute of Engineering and Technology, Multan 59030, Pakistan
| | - Shuguang Lu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Mark L Brusseau
- Soil, Water and Environmental Science Department, School of Earth and Environmental Sciences, The University of Arizona, 429 Shantz Bldg., Tucson, AZ 85721, United States
| | - Muhammmad Naqvi
- Department of Energy, Building and Environment, Mälardalen University, Västerås 72123, Sweden
| | - Xiaro Fu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
- Soil, Water and Environmental Science Department, School of Earth and Environmental Sciences, The University of Arizona, 429 Shantz Bldg., Tucson, AZ 85721, United States
| | - Xiang Zhang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Qian Sui
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Zhaofu Qiu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
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Dies H, Raveendran J, Escobedo C, Docoslis A. In situ assembly of active surface-enhanced Raman scattering substrates via electric field-guided growth of dendritic nanoparticle structures. NANOSCALE 2017; 9:7847-7857. [PMID: 28555703 DOI: 10.1039/c7nr01743j] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Surface-enhanced Raman scattering (SERS) can provide ultrasensitive detection of chemical and biological analytes down to the level of a single molecule. The need for costly, nanostructured, noble-metal substrates, however, poses a major obstacle in the widespread application of the method. Here we present for the first time a novel type of metallic nanostructured substrates that, not only exhibit a remarkable SERS activity, but are also produced in a facile, cost-effective and nanofabrication-free manner. The substrates are formed through an electric field-guided assembly process of silver nanocolloids, which results in extended and interconnected dendritic nanoparticle structures with a high density of "hot spots". A unique and significant performance attribute of these nanostructures is their ability to also function as concentration amplification devices, thereby further enhancing their analyte detection efficiency. This major advantage against conventional SERS substrates is illustrated experimentally here with the concentration and detection of proteins from solution. Low limits of detection for illicit drugs, food contaminants and pesticides in relevant matrices are also demonstrated. The SERS-active dendrites are reusable and can be removed and replaced in a few minutes. The SERS substrates presented herein constitute a significant advance towards more effective and less expensive diagnostic tools.
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Affiliation(s)
- Hannah Dies
- Department of Chemical Engineering, Queen's University, Kingston, ON, K7L 3N6 Canada.
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12
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Niu C, Zou B, Wang Y, Cheng L, Zheng H, Zhou S. Highly Sensitive and Reproducible SERS Performance from Uniform Film Assembled by Magnetic Noble Metal Composite Microspheres. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:858-863. [PMID: 26731200 DOI: 10.1021/acs.langmuir.5b03802] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
To realize highly sensitive and reproducible SERS performance, a new route was put forward to construct uniform SERS film by using magnetic composite microspheres. In the experiment, monodisperse Fe3O4@SiO2@Ag microspheres with hierarchical surface were developed and used as building block of SERS substrate, which not only realized fast capturing analyte through dispersion and collection under external magnet but also could be built into uniform film through magnetically induced self-assembly. By using R6G as probe molecule, the as-obtained uniform film exhibited great improvement on SERS performance in both sensitivity and reproducibility when compared with nonuniform film, demonstrating the perfect integration of high sensitivity of hierarchal noble metal microspheres and high reproducibility of ordered microspheres array. Furthermore, the as-obtained product was used to detect pesticide thiram and also exhibited excellent SERS performance for trace detection.
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Affiliation(s)
- Chunyu Niu
- Key Laboratory for Special Functional Materials of the Ministry of Education and ‡School of Physics and Electronics, Henan University , Kaifeng 475004, P. R. China
| | - Bingfang Zou
- Key Laboratory for Special Functional Materials of the Ministry of Education and ‡School of Physics and Electronics, Henan University , Kaifeng 475004, P. R. China
| | - Yongqiang Wang
- Key Laboratory for Special Functional Materials of the Ministry of Education and ‡School of Physics and Electronics, Henan University , Kaifeng 475004, P. R. China
| | - Lin Cheng
- Key Laboratory for Special Functional Materials of the Ministry of Education and ‡School of Physics and Electronics, Henan University , Kaifeng 475004, P. R. China
| | - Haihong Zheng
- Key Laboratory for Special Functional Materials of the Ministry of Education and ‡School of Physics and Electronics, Henan University , Kaifeng 475004, P. R. China
| | - Shaomin Zhou
- Key Laboratory for Special Functional Materials of the Ministry of Education and ‡School of Physics and Electronics, Henan University , Kaifeng 475004, P. R. China
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13
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Chang K, Chung H. Simple electrochemical synthesis of an Au–Ag–Cu trimetallic nanodendrite and its use as a SERS substrate. RSC Adv 2016. [DOI: 10.1039/c6ra01670g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An Au–Ag–Cu trimetallic nanodendrite was constructed by simple electrochemical methods and was evaluated as a surface enhanced Raman scattering (SERS) substrate.
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Affiliation(s)
- Kyeol Chang
- Analytical Spectroscopy Lab
- Department of Chemistry and Institute for Materials Design
- Hanyang University
- Seoul 133-791
- Korea
| | - Hoeil Chung
- Analytical Spectroscopy Lab
- Department of Chemistry and Institute for Materials Design
- Hanyang University
- Seoul 133-791
- Korea
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14
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Tian Y, Jiang Z, Wang C, Ding S, Wen J, Liu Z, Wang C. Sintering mechanism of the Cu–Ag core–shell nanoparticle paste at low temperature in ambient air. RSC Adv 2016. [DOI: 10.1039/c6ra16474a] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Cu–Ag core–shell nanoparticles owned good anti-oxidation ability, and as-fabricated joints using the Cu–Ag core–shell nanoparticles paste showed high shear strength.
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Affiliation(s)
- Yanhong Tian
- State Key Laboratory of Advanced Welding and Joining
- Harbin Institute of Technology
- Harbin
- China
| | - Zhi Jiang
- State Key Laboratory of Advanced Welding and Joining
- Harbin Institute of Technology
- Harbin
- China
| | - Chenxi Wang
- State Key Laboratory of Advanced Welding and Joining
- Harbin Institute of Technology
- Harbin
- China
| | - Su Ding
- State Key Laboratory of Advanced Welding and Joining
- Harbin Institute of Technology
- Harbin
- China
| | - Jiayue Wen
- State Key Laboratory of Advanced Welding and Joining
- Harbin Institute of Technology
- Harbin
- China
| | - Zhiquan Liu
- Institute of Metal Research
- Chinese Academy of Sciences
- Shenyang
- China
| | - Chunqing Wang
- State Key Laboratory of Advanced Welding and Joining
- Harbin Institute of Technology
- Harbin
- China
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15
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Liu X, Sui Y, Yang X, Jiang L, Wei Y, Kong L, Zou B. An environmentally friendly route to synthesize Cu micro/nanomaterials with “sustainable oxidation resistance” and promising catalytic performance. RSC Adv 2016. [DOI: 10.1039/c6ra02039a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Cu micro/nanomaterials with sustainable oxidation resistance and promising catalytic performance.
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Affiliation(s)
- Xinmei Liu
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- China
| | - Yongming Sui
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- China
| | - Xinyi Yang
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- China
| | - Lina Jiang
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- China
| | - Yingjin Wei
- Key Laboratory of Physics and Technology for Advanced Batteries
- College of Physics
- Jilin University
- Changchun
- China
| | | | - Bo Zou
- State Key Laboratory of Superhard Materials
- Jilin University
- Changchun 130012
- China
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16
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Guo R, Chen X, Zhu X, Dong A, Zhang J. A facile strategy to fabricate covalently linked raspberry-like nanocomposites with pH and thermo tunable structures. RSC Adv 2016. [DOI: 10.1039/c6ra03965k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple and controllable route to prepare covalently bonded raspberry-like composite particles with pH and thermal dual-responsiveness.
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Affiliation(s)
- Ruiwei Guo
- Department of Polymer Science and Engineering
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin
- China
| | - Xing Chen
- Department of Polymer Science and Engineering
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin
- China
| | - Xiaolei Zhu
- China National Chemical Corporation
- Beijing
- China
| | - Anjie Dong
- Department of Polymer Science and Engineering
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin
- China
| | - Jianhua Zhang
- Department of Polymer Science and Engineering
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin
- China
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17
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Xu S, Li H, Wang L, Yue Q, Li R, Xue Q, Zhang Y, Liu J. Synthesis of Carbon‐Encapsulated Cu–Ag Dimetallic Nanoparticles and Their Recyclable Superior Catalytic Activity towards 4‐Nitrophenol Reduction. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500599] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Shuling Xu
- Department of Chemistry, Liaocheng University, Liaocheng 252059, China, http://www.lcu.edu.cn
| | - Haibo Li
- Department of Chemistry, Liaocheng University, Liaocheng 252059, China, http://www.lcu.edu.cn
| | - Lei Wang
- Department of Chemistry, Liaocheng University, Liaocheng 252059, China, http://www.lcu.edu.cn
| | - Qiaoli Yue
- Department of Chemistry, Liaocheng University, Liaocheng 252059, China, http://www.lcu.edu.cn
| | - Rui Li
- Department of Chemistry, Liaocheng University, Liaocheng 252059, China, http://www.lcu.edu.cn
| | - Qingwang Xue
- Department of Chemistry, Liaocheng University, Liaocheng 252059, China, http://www.lcu.edu.cn
| | - Yuanfu Zhang
- Department of Chemistry, Liaocheng University, Liaocheng 252059, China, http://www.lcu.edu.cn
| | - Jifeng Liu
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China, http://www.tust.edu.cn
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18
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Ye M, Wei Z, Hu F, Wang J, Ge G, Hu Z, Shao M, Lee ST, Liu J. Fast assembling microarrays of superparamagnetic Fe3O4@Au nanoparticle clusters as reproducible substrates for surface-enhanced Raman scattering. NANOSCALE 2015; 7:13427-13437. [PMID: 26079311 DOI: 10.1039/c5nr02491a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
It is currently a very active research area to develop new types of substrates which integrate various nanomaterials for surface-enhanced Raman scattering (SERS) techniques. Here we report a unique approach to prepare SERS substrates with reproducible performance. It features silicon mold-assisted magnetic assembling of superparamagnetic Fe3O4@Au nanoparticle clusters (NCs) into arrayed microstructures on a wafer scale. This approach enables the fabrication of both silicon-based and hydrogel-based substrates in a sequential manner. We have demonstrated that strong SERS signals can be harvested from these substrates due to an efficient coupling effect between Fe3O4@Au NCs, with enhancement factors >10(6). These substrates have been confirmed to provide reproducible SERS signals, with low variations in different locations or batches of samples. We investigate the spatial distributions of electromagnetic field enhancement around Fe3O4@Au NCs assemblies using finite-difference-time-domain (FDTD) simulations. The procedure to prepare the substrates is straightforward and fast. The silicon mold can be easily cleaned out and refilled with Fe3O4@Au NCs assisted by a magnet, therefore being re-useable for many cycles. Our approach has integrated microarray technologies and provided a platform for thousands of independently addressable SERS detection, in order to meet the requirements of a rapid, robust, and high throughput performance.
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Affiliation(s)
- Min Ye
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials & Devices, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu Province 215123, China.
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19
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Jin Y, Chen F, Lei Y, Wu X. A Silver-Copper Alloy as an Oxygen Reduction Electrocatalyst for an Advanced Zinc-Air Battery. ChemCatChem 2015. [DOI: 10.1002/cctc.201500228] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Xu X, Kim K, Liu C, Fan D. Fabrication and robotization of ultrasensitive plasmonic nanosensors for molecule detection with Raman scattering. SENSORS (BASEL, SWITZERLAND) 2015; 15:10422-51. [PMID: 25946633 PMCID: PMC4481927 DOI: 10.3390/s150510422] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2015] [Revised: 04/09/2015] [Accepted: 04/14/2015] [Indexed: 11/16/2022]
Abstract
In this work, we introduce the history and mechanisms of surface enhanced Raman scattering (SERS), discuss various techniques for fabrication of state-of-the-art SERS substrates, and review recent work on robotizing plasmonic nanoparticles, especially, the efforts we made on fabrication, characterization, and robotization of Raman nanosensors by design. Our nanosensors, consisting of tri-layer nanocapsule structures, are ultrasensitive, well reproducible, and can be robotized by either electric or magnetic tweezers. Three applications using such SERS nanosensors were demonstrated, including location predictable detection, single-cell bioanalysis, and tunable molecule release and monitoring. The integration of SERS and nanoelectromechanical system (NEMS) devices is innovative in both device concept and fabrication, and could potentially inspire a new device scheme for various bio-relevant applications.
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Affiliation(s)
- Xiaobin Xu
- Materials Science and Engineering Program, the University of Texas at Austin, Austin, TX 78712, USA.
| | - Kwanoh Kim
- Department of Mechanical Engineering, the University of Texas at Austin, Austin, TX 78712, USA.
| | - Chao Liu
- Materials Science and Engineering Program, the University of Texas at Austin, Austin, TX 78712, USA.
| | - Donglei Fan
- Materials Science and Engineering Program, the University of Texas at Austin, Austin, TX 78712, USA.
- Department of Mechanical Engineering, the University of Texas at Austin, Austin, TX 78712, USA.
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21
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Gu HX, Xue L, Zhang YF, Li DW, Long YT. Facile fabrication of a silver dendrite-integrated chip for surface-enhanced Raman scattering. ACS APPLIED MATERIALS & INTERFACES 2015; 7:2931-6. [PMID: 25569304 DOI: 10.1021/am508403k] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A facile approach to fabricating a surface-enhanced Raman scattering (SERS)-active chip by integrating silver dendrites with copper substrate through a one-step process was explored. The structures of dendrites were synthesized and controlled by an AgNO3/PVP aqueous system, and the fabrication parameters amount of AgNO3/PVP and reaction time were systematically investigated. The optimized silver dendrites, closely aggregated on the surface of the copper chip, exhibited high SERS activity for detecting rhodamine 6G at a concentration as low as 3.2 × 10(-11) M. Meanwhile, the prepared SERS-active chip displayed a high thermal stability and good reproducibility. Moreover, the potential application for analysis of polycyclic aromatic hydrocarbons was demonstrated by detection of fluoranthene at a low concentration of 4.5 × 10(-10) M. This SERS-active chip prepared by the convenient and high-yield method would be a promising means for rapid detection under field conditions.
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Affiliation(s)
- Hai-Xin Gu
- Key Laboratory for Advanced Materials and Department of Chemistry, East China University of Science and Technology , Shanghai 200237, P. R. China
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22
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Zhao Y, Yang X, Li H, Luo Y, Yu R, Zhang L, Yang Y, Song Q. Au nanoflower–Ag nanoparticle assembled SERS-active substrates for sensitive MC-LR detection. Chem Commun (Camb) 2015; 51:16908-11. [DOI: 10.1039/c5cc05868f] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Au nanoflower–Ag nanoparticle core–satellite assembly engineered Raman aptasensors achieved the sensitive detection of microcystin-LR in Tai lake water.
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Affiliation(s)
- Yuan Zhao
- The Key Lab of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
| | - Xuan Yang
- The Key Lab of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
| | - Hao Li
- The Key Lab of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
| | - Yaodong Luo
- The Key Lab of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
| | - Ruipeng Yu
- The Key Lab of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
| | - Lingling Zhang
- The Key Lab of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
| | - Yaxin Yang
- The Key Lab of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
| | - Qijun Song
- The Key Lab of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
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23
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Choi E, Lee S, Piao Y. A solventless mix–bake–wash approach to the facile controlled synthesis of core–shell and alloy Ag–Cu bimetallic nanoparticles. CrystEngComm 2015. [DOI: 10.1039/c5ce00670h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A solventless mix–bake–wash method using salt powder was developed to fabricate uniform Ag–Cu core–shell and alloy bimetallic nanoparticles.
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Affiliation(s)
- Eunjin Choi
- Program in Nano Science and Technology
- Department of Transdisciplinary Studies
- Graduate School of Convergence Science and Technology
- Seoul National University
- Seoul 151-742, Republic of Korea
| | - Sohee Lee
- Program in Nano Science and Technology
- Department of Transdisciplinary Studies
- Graduate School of Convergence Science and Technology
- Seoul National University
- Seoul 151-742, Republic of Korea
| | - Yuanzhe Piao
- Program in Nano Science and Technology
- Department of Transdisciplinary Studies
- Graduate School of Convergence Science and Technology
- Seoul National University
- Seoul 151-742, Republic of Korea
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24
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Fu F, Cheng Z, Lu J. Synthesis and use of bimetals and bimetal oxides in contaminants removal from water: a review. RSC Adv 2015. [DOI: 10.1039/c5ra13067k] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This paper gives an overview of the recent advances of the synthesis methods of bimetals and bimetal oxides and applying them in contaminant removal from water.
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Affiliation(s)
- Fenglian Fu
- School of Environmental Science and Engineering
- Guangdong University of Technology
- Guangzhou 510006
- PR China
| | - Zihang Cheng
- School of Environmental Science and Engineering
- Guangdong University of Technology
- Guangzhou 510006
- PR China
| | - Jianwei Lu
- School of Environmental Science and Engineering
- Guangdong University of Technology
- Guangzhou 510006
- PR China
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25
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26
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Lin PC, Lin S, Wang PC, Sridhar R. Techniques for physicochemical characterization of nanomaterials. Biotechnol Adv 2014; 32:711-26. [PMID: 24252561 PMCID: PMC4024087 DOI: 10.1016/j.biotechadv.2013.11.006] [Citation(s) in RCA: 245] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2013] [Revised: 11/05/2013] [Accepted: 11/12/2013] [Indexed: 12/12/2022]
Abstract
Advances in nanotechnology have opened up a new era of diagnosis, prevention and treatment of diseases and traumatic injuries. Nanomaterials, including those with potential for clinical applications, possess novel physicochemical properties that have an impact on their physiological interactions, from the molecular level to the systemic level. There is a lack of standardized methodologies or regulatory protocols for detection or characterization of nanomaterials. This review summarizes the techniques that are commonly used to study the size, shape, surface properties, composition, purity and stability of nanomaterials, along with their advantages and disadvantages. At present there are no FDA guidelines that have been developed specifically for nanomaterial based formulations for diagnostic or therapeutic use. There is an urgent need for standardized protocols and procedures for the characterization of nanoparticles, especially those that are intended for use as theranostics.
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MESH Headings
- Chemistry, Physical/methods
- Circular Dichroism
- Contrast Media/chemistry
- Humans
- Light
- Magnetic Resonance Spectroscopy
- Mass Spectrometry
- Microscopy, Atomic Force
- Microscopy, Electron, Scanning
- Microscopy, Electron, Transmission
- Microscopy, Scanning Tunneling
- Molecular Imaging/methods
- Nanomedicine/methods
- Nanoparticles/chemistry
- Nanostructures/chemistry
- Nanotechnology/methods
- Nanotechnology/trends
- Scattering, Radiation
- Spectrometry, Fluorescence
- Spectrophotometry, Infrared
- Spectrum Analysis, Raman
- Surface Properties
- Technology, Pharmaceutical/methods
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Affiliation(s)
- Ping-Chang Lin
- Laboratory of Molecular Imaging, Department of Radiology, Howard University, Washington, DC 20060, USA
| | - Stephen Lin
- Laboratory of Molecular Imaging, Department of Radiology, Howard University, Washington, DC 20060, USA
| | - Paul C Wang
- Laboratory of Molecular Imaging, Department of Radiology, Howard University, Washington, DC 20060, USA
| | - Rajagopalan Sridhar
- Department of Radiation Oncology, Howard University, Washington, DC 20060, USA.
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