1
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Wang Z, Li S, Wang J, Shao Y, Mei L. A recyclable graphene/Ag/TiO 2 SERS substrate with high stability and reproducibility for detection of dye molecules. NEW J CHEM 2022. [DOI: 10.1039/d2nj02577a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Magnetron sputtering combined with the wet chemical transfer of graphene successfully prepared a multilayer composite material and an efficient photocatalytic renewable SERS substrate. It has excellent photocatalytic activity against dye molecules.
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Affiliation(s)
- Zezhou Wang
- School of Mechanical Engineering, North University of China, Taiyuan, Shanxi Province 030051, China
| | - Sha Li
- School of Mechanical Engineering, North University of China, Taiyuan, Shanxi Province 030051, China
| | - Junyuan Wang
- School of Mechanical Engineering, North University of China, Taiyuan, Shanxi Province 030051, China
| | - Yunpeng Shao
- School of Mechanical Engineering, North University of China, Taiyuan, Shanxi Province 030051, China
| | - Linyu Mei
- School of Mechanical Engineering, North University of China, Taiyuan, Shanxi Province 030051, China
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2
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Silver Flowerlike Structures for Surface-Enhanced Raman Spectroscopy. NANOMATERIALS 2021; 11:nano11123184. [PMID: 34947532 PMCID: PMC8706669 DOI: 10.3390/nano11123184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 11/18/2021] [Accepted: 11/22/2021] [Indexed: 11/16/2022]
Abstract
Micro- and nanoflowers are a class of materials composed of particles with high surface-to-volume ratio. They have been extensively studied in the last decade due to simple preparation protocols and promising applications in biosensing, as drug delivery agents, for water purification, and so on. Flowerlike objects, due to their highly irregular surface, may act also as plasmonic materials, providing resonant coupling between optical waves and surface plasmon excitations. This fact allows us to infer the possibility to use micro- and nanoflowers as effective surface-enhanced Raman scattering (SERS) substrate materials. Here, we report on the design and Raman enhancement properties of silver flowerlike structures, deposited on aluminum surface. A simple and cost-effective fabrication method is described, which leads to SERS substrates of high developed surface area. The morphology of the silver flowers on a nanoscale is characterized by self-organized quasiperiodic stacks of nanosheets, which act as plasmonic cavity resonators. The substrates were tested against rhodamine-6G (R6G) water solutions of concentration varying between 10−3 M and 10−7 M. Optimal SERS enhancement factors of up to 105 were established at R6G concentrations in the 10−6–10−7 M range.
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3
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Lin P, Nie L, Xu Z, Wei W, Cheng T, Chen Y, Zeng X. One-Step and Ligand-Free Modification of Au Nanoparticles on Highly Ordered TiO2 Nanotube Arrays for Effective Photoelectrocatalytic Decontamination. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b04911] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | - Tiedong Cheng
- School of Electrical Engineering and Automation, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, China
| | - Youliang Chen
- School of Electrical Engineering and Automation, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, China
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4
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Affiliation(s)
- Jai Prakash
- Department of Chemistry, National Institute of Technology Hamirpur, Hamirpur, India
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5
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TiO 2 and Au-TiO 2 Nanomaterials for Rapid Photocatalytic Degradation of Antibiotic Residues in Aquaculture Wastewater. MATERIALS 2019; 12:ma12152434. [PMID: 31370138 PMCID: PMC6695739 DOI: 10.3390/ma12152434] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 07/26/2019] [Accepted: 07/27/2019] [Indexed: 11/17/2022]
Abstract
Antibiotic residues in aquaculture wastewater are considered as an emerging environmental problem, as they are not efficiently removed in wastewater treatment plants. To address this issue, we fabricated TiO2 nanotube arrays (TNAs), TiO2 nanowires on nanotube arrays (TNWs/TNAs), Au nanoparticle (NP)-decorated-TNAs, and TNWs/TNAs, which were applied for assessing the photocatalytic degradation of eight antibiotics, simultaneously. The TNAs and TNWs/TNAs were synthesized by anodization using an aqueous NH4F/ethylene glycol solution. Au NPs were synthesized by chemical reduction method, and used to decorate on TNAs and TNWs/TNAs. All the TiO2 nanostructures exhibited anatase phase and well-defined morphology. The photocatalytic performance of TNAs, TNWs/TNAs, Au-TNAs and Au-TNWs/TNAs was studied by monitoring the degradation of amoxicillin, ampicillin, doxycycline, oxytetracycline, lincomycin, vancomycin, sulfamethazine, and sulfamethoxazole under ultraviolet (UV)-visible (VIS), or VIS illumination by LC-MS/MS method. All the four kinds of nanomaterials degraded the antibiotics effectively and rapidly, in which most antibiotics were removed completely after 20 min treatment. The Au-TNWs/TNAs exhibited the highest photocatalytic activity in degradation of the eight antibiotics. For example, reaction rate constants of Au-TNWs/TNAs for degradation of lincomycin reached 0.26 min−1 and 0.096 min−1 under UV-VIS and VIS irradiation, respectively; and they were even higher for the other antibiotics. The excellent photocatalytic activity of Au-TNWs/TNAs was attributed to the synergistic effects of: (1) The larger surface area of TNWs/TNAs as compared to TNAs, and (2) surface plasmonic effect in Au NPs to enhance the visible light harvesting.
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6
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Bassi B, Albini B, D'Agostino A, Dacarro G, Pallavicini P, Galinetto P, Taglietti A. Robust, reproducible, recyclable SERS substrates: monolayers of gold nanostars grafted on glass and coated with a thin silica layer. NANOTECHNOLOGY 2019; 30:025302. [PMID: 30411711 DOI: 10.1088/1361-6528/aae9b3] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We prepared and characterized recyclable surface enhanced Raman spectroscopy (SERS) active glass chips. Gold nanostars were grafted on properly functionalized glasses by means of electrostatic interactions and then they were coated with a silica layer of controllable thickness in the nanometer range. The SERS activity of the obtained substrates were tested in terms of reproducibility and homogeneity intra-samples and inter-samples from different batches using the Raman reporter as the model compound rhodamine 6G. The uncoated substrates were used as reference to evaluate the effect of silica spacers on SERS enhancement factors (EFs). The chemical route to obtain silica-coated SERS chips is described in detail, and the morphology and the optical response of substrates have been characterized. We demonstrate that SERS substrates coated with 1 nm silica conserve a good EF, and that the coating confers to the SERS platform an extreme robustness leading to reusability of the substrates.
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Affiliation(s)
- B Bassi
- Dipartimento di Chimica, Sezione di Chimica Generale, Università di Pavia, viale Taramelli, 12, I-27100 Pavia, Italy
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7
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Fu P, Xiao Z, Liu Y, Wang L, Zhang X, Li G. Support-Independent Surface Functionalization for Efficient Pd Loading in Catalytic Hydrogenation. ChemistrySelect 2018. [DOI: 10.1002/slct.201800106] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Peng Fu
- Key Laboratory for Green Chemical Technology of Ministry of Education; School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
| | - Zhourong Xiao
- Key Laboratory for Green Chemical Technology of Ministry of Education; School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
| | - Yanhong Liu
- Key Laboratory for Green Chemical Technology of Ministry of Education; School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
| | - Li Wang
- Key Laboratory for Green Chemical Technology of Ministry of Education; School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
| | - Xiangwen Zhang
- Key Laboratory for Green Chemical Technology of Ministry of Education; School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
| | - Guozhu Li
- Key Laboratory for Green Chemical Technology of Ministry of Education; School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
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8
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Castillo-Robles JM, Orgaz E. Structural and optical properties of Ni atoms and
$$\hbox {Ni}_{55}$$
Ni
55
cluster adsorbed on a rutile
$$\hbox {TiO}_{2}$$
TiO
2
(110) surface. Theor Chem Acc 2018. [DOI: 10.1007/s00214-018-2211-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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9
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Hyam RS, Jeon J, Chae S, Park YT, Kim SJ, Lee B, Lee C, Choi D. Plasmonic-Photonic Interference Coupling in Submicrometer Amorphous TiO 2-Ag Nanoarchitectures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:12398-12403. [PMID: 28985679 DOI: 10.1021/acs.langmuir.7b01080] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this study, we report the crystallinity effects of submicrometer titanium dioxide (TiO2) nanotube (TNT) incorporated with silver (Ag) nanoparticles (NPs) on surface-enhanced Raman scattering (SERS) sensitivity. Furthermore, we demonstrate the SERS behaviors dependent on the plasmonic-photonic interference coupling (P-PIC) in the TNT-AgNP nanoarchitectures. Amorphous TNTs (A-TNTs) are synthesized through a two-step anodization on titanium (Ti) substrate, and crystalline TNTs (C-TNTs) are then prepared by using thermal annealing process at 500 °C in air. After thermally evaporating 20 nm thick Ag on TNTs, we investigate SERS signals according to the crystallinity and P-PIC on our TNT-AgNP nanostructures. (A-TNTs)-AgNP substrates show dramatically enhanced SERS performance as compared to (C-TNTs)-AgNP substrates. We attribute the high enhancement on (A-TNTs)-AgNP substrates with electron confinement at the interface between A-TNTs and AgNPs as due to the high interfacial barrier resistance caused by band edge positions. Moreover, the TNT length variation in (A-TNTs)-AgNP nanostructures results in different constructive or destructive interference patterns, which in turn affects the P-PIC. Finally, we could understand the significant dependency of SERS intensity on P-PIC in (A-TNTs)-AgNP nanostructures. Our results thus might provide a suitable design for a myriad of applications of enhanced EM on plasmonic-integrated devices.
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Affiliation(s)
| | | | | | - Yong Tae Park
- Department of Mechanical Engineering, Myongji University , 241, Geumhak-ro, Cheoin-gu, Yongin-si, Gyeonggi-do 449-728, Republic of Korea
| | - Sung Jae Kim
- Department of Electrical and Computer Engineering, Seoul National University , 1 Gwanakro, Gwanak-gu, Seoul 08826, Republic of Korea
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10
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Farsinezhad S, Banerjee SP, Bangalore Rajeeva B, Wiltshire BD, Sharma H, Sura A, Mohammadpour A, Kar P, Fedosejevs R, Shankar K. Reduced Ensemble Plasmon Line Widths and Enhanced Two-Photon Luminescence in Anodically Formed High Surface Area Au-TiO 2 3D Nanocomposites. ACS APPLIED MATERIALS & INTERFACES 2017; 9:740-749. [PMID: 28001362 DOI: 10.1021/acsami.6b13164] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Localized surface plasmon resonances (LSPR) in TiO2 nanorod and nanotube arrays decorated by gold nanoparticles can be exploited to improve photocatalytic activity, enhance nonlinear optical coefficients, and increase light harvesting in solar cells. However, the LSPR typically has a low quality factor, and the resonance is often obscured by the Urbach tail of the TiO2 band gap absorption. Attempts to increase the LSPR extinction intensity by increasing the density of gold nanoparticles on the surface of the TiO2 nanostructures invariably produce peak broadening due to the effects of either agglomeration or polydispersity. We present a new class of hybrid nanostructures containing gold nanoparticles (NPs) partially embedded in nanoporous/nanotubular TiO2 by performing the anodization of cosputtered Ti-Au thin films containing a relatively high ratio of Au:Ti. Our method of anodizing thin film stacks containing alternate layers of Ti and TiAu results in very distinctive LSPR peaks with quality factors as high as 6.9 and ensemble line widths as small as 0.33 eV even in the presence of an Urbach tail. Unusual features in the anodization of such films are observed and explained, including oscillatory current transients and the observation of coherent heterointerfaces between the Au NPs and anatase TiO2. We further show that such a plasmonic NP-embedded nanotube structure dramatically outperforms a plasmonic NP-decorated anodic nanotube structure in terms of the extinction coefficient, and achieves a strongly enhanced two-photon fluorescence due to the high density of gold nanoparticles in the composite film and the plasmonic local field enhancement.
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Affiliation(s)
- Samira Farsinezhad
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Shyama Prasad Banerjee
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Bharath Bangalore Rajeeva
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Benjamin D Wiltshire
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Himani Sharma
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Anton Sura
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Arash Mohammadpour
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Piyush Kar
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Robert Fedosejevs
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Karthik Shankar
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
- NRC National Institute for Nanotechnology , 11421 Saskatchewan Drive NW, Edmonton, Alberta T6G 2M9, Canada
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11
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Jiang S, Guo J, Zhang C, Li C, Wang M, Li Z, Gao S, Chen P, Si H, Xu S. A sensitive, uniform, reproducible and stable SERS substrate has been presented based on MoS2@Ag nanoparticles@pyramidal silicon. RSC Adv 2017. [DOI: 10.1039/c6ra26879j] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
By combine the Ag nanoparticles, pyramidal silicon and molybdenum disulfide, the MoS2@AgNPs@PSi substrate shows high performance in terms of sensitivity, uniformity, reproducibility and stability.
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Affiliation(s)
- Shouzhen Jiang
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Jia Guo
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Chao Zhang
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Chonghui Li
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Minghong Wang
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Zhen Li
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Saisai Gao
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Peixi Chen
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Haipeng Si
- Department of Orthopaedics
- Qilu Hospital
- Shandong University
- Jinan 250012
- China
| | - Shicai Xu
- Shandong Provincial Key Laboratory of Biophysics
- College of Physics and Electronic Information
- Dezhou University
- Dezhou 253023
- PR China
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12
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A suitable for large scale production, flexible and transparent surface-enhanced Raman scattering substrate for in situ ultrasensitive analysis of chemistry reagents. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.08.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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13
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Xie Y, Meng Y, Wu M. Visible-light-driven self-cleaning SERS substrate of silver nanoparticles and graphene oxide decorated nitrogen-doped titania nanotube array. SURF INTERFACE ANAL 2016. [DOI: 10.1002/sia.5964] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Yibing Xie
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
- Suzhou Research Institute of Southeast University; Suzhou 215123 China
| | - Yujie Meng
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
- Suzhou Research Institute of Southeast University; Suzhou 215123 China
| | - Miao Wu
- Zhejiang Provincial Hospital of TCM; Hangzhou 310006 China
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14
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Li Y, Zhang W, Li L, Yi C, Lv H, Song Q. Litchi-like CdS/CdTiO3–TiO2 composite: synthesis and enhanced photocatalytic performance for crystal violet degradation and hydrogen production. RSC Adv 2016. [DOI: 10.1039/c6ra05631h] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
CdS/CdTiO3–TiO2 composites prepared under different conditions contain a mixture of crystal phases of CdS, CdTiO3 and TiO2. The conditions of synthesis have an impact on the photocatalytic performance for dye degradation and hydrogen production.
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Affiliation(s)
- Yixuan Li
- College of Materials Science and Engineering
- Qiqihar University
- Qiqihar 161006
- PR China
- College of Chemistry and Chemical Engineering
| | - Wenzhi Zhang
- College of Materials Science and Engineering
- Qiqihar University
- Qiqihar 161006
- PR China
- College of Chemistry and Chemical Engineering
| | - Li Li
- College of Materials Science and Engineering
- Qiqihar University
- Qiqihar 161006
- PR China
- College of Chemistry and Chemical Engineering
| | - Chunxiong Yi
- College of Chemistry and Chemical Engineering
- Qiqihar University
- Qiqihar 161006
- PR China
| | - Haiyuan Lv
- College of Materials Science and Engineering
- Qiqihar University
- Qiqihar 161006
- PR China
| | - Qiang Song
- College of Materials Science and Engineering
- Qiqihar University
- Qiqihar 161006
- PR China
- College of Chemistry and Chemical Engineering
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15
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Wang C, Xu Y, Deng C, Liu Z, Wang R, Zhao H. Design and preparation of a recyclable microfluidic SERS chip with integrated Au@Ag/TiO2 NTs. RSC Adv 2016. [DOI: 10.1039/c6ra14947b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Design and preparation of a recyclable microfluidic SERS chip with integrated Au@Ag/TiO2 NTs.
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Affiliation(s)
- Chunyan Wang
- Microsystem Research Center
- School of Optoelectronic Engineering
- Chongqing University
- Chongqing 400044
- China
| | - Yi Xu
- Microsystem Research Center
- School of Optoelectronic Engineering
- Chongqing University
- Chongqing 400044
- China
| | - Conghui Deng
- Bioengineering College
- Chongqing University
- Chongqing 400044
- China
| | - Zhixu Liu
- International R & D Center of Micro-nano Systems and New Materials Technology
- Chongqing University
- Chongqing 400044
- China
- Defense Key Disciplines Laboratory of Novel Micro-nano Devices and System Technology
| | - Rong Wang
- International R & D Center of Micro-nano Systems and New Materials Technology
- Chongqing University
- Chongqing 400044
- China
- Defense Key Disciplines Laboratory of Novel Micro-nano Devices and System Technology
| | - Huazhou Zhao
- International R & D Center of Micro-nano Systems and New Materials Technology
- Chongqing University
- Chongqing 400044
- China
- Defense Key Disciplines Laboratory of Novel Micro-nano Devices and System Technology
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16
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Wang X, Zhou L, Lai W, Jiang T, Zhou J. Bifunctional 4MBA mediated recyclable SERS-based immunoassay induced by photocatalytic activity of TiO2 nanotube arrays. Phys Chem Chem Phys 2016; 18:23795-802. [DOI: 10.1039/c6cp03592b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
We present a recyclable SERS-based immunoassay for CA19-9 with a low detection limit of 5 U mL−1. The linking between TiO2-NTs and 4MBA was destroyed by catalyzing 4MBA into 4-sulfobenzoate upon UV irradiation, which was clarified by UPLC/ESI-tqMS and density functional theory.
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Affiliation(s)
- Xiaolong Wang
- Institute of Photonics
- Faculty of Science
- Ningbo University
- Ningbo
- China
| | - Lu Zhou
- Institute of Photonics
- Faculty of Science
- Ningbo University
- Ningbo
- China
| | - Wei Lai
- Institute of Photonics
- Faculty of Science
- Ningbo University
- Ningbo
- China
| | - Tao Jiang
- Institute of Photonics
- Faculty of Science
- Ningbo University
- Ningbo
- China
| | - Jun Zhou
- Institute of Photonics
- Faculty of Science
- Ningbo University
- Ningbo
- China
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17
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Wang Q, Hu L, Chen M, Wu L. Synthesis and enhanced photoelectric performance of Au/ZnO hybrid hollow sphere. RSC Adv 2015. [DOI: 10.1039/c5ra21787c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The maximum responsivity (Rλ) and photocurrent of Au/ZnO nanodevice showed 10 times enhancement than that of pure ZnO hollow spheres.
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Affiliation(s)
- Qin Wang
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers
- Fudan University
- Shanghai 200433
- China
| | - Linfeng Hu
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers
- Fudan University
- Shanghai 200433
- China
| | - Min Chen
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers
- Fudan University
- Shanghai 200433
- China
| | - Limin Wu
- Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers
- Fudan University
- Shanghai 200433
- China
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18
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Wang Y, Su Y, Zhu M, Kang L. Ni cluster nucleation and growth on the anatase TiO2(101) surface: a density functional theory study. RSC Adv 2015. [DOI: 10.1039/c4ra13975e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The Ni–TiO2 interaction is the main driving force at the initial stage of Ni nucleation. The Ni–Ni interaction begins to control the growth process as the cluster size gets larger.
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Affiliation(s)
- Yanxin Wang
- College of Chemistry and Chemical Engineering
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi
- China
| | - Yan Su
- School of Physics and Optoelectronic Technology and College of Advanced Science and Technology
- Dalian University of Technology
- Dalian 116024
- China
| | - Mingyuan Zhu
- College of Chemistry and Chemical Engineering
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi
- China
| | - Lihua Kang
- College of Chemistry and Chemical Engineering
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi
- China
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19
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Xu S, Wang J, Zou Y, Liu H, Wang G, Zhang X, Jiang S, Li Z, Cao D, Tang R. High performance SERS active substrates fabricated by directly growing graphene on Ag nanoparticles. RSC Adv 2015. [DOI: 10.1039/c5ra18333b] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
An efficient surface enhanced Raman scattering (SERS) substrate of graphene-isolated Ag nanoparticle (G/AgNP) has been developed by using excimer laser to ablate the ordered pyrolytic graphite in high vacuum onto Ag nanoparticles.
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20
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Lamberti A, Virga A, Giorgis F. Microfluidic electrochemical growth of vertically aligned TiO2 nanotubes for SERS optofluidic devices. RSC Adv 2015. [DOI: 10.1039/c5ra23434d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The growth of a TiO2 nanotubes (NTs) array into a microfluidic electrochemical reactor is here demonstrated.
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Affiliation(s)
- Andrea Lamberti
- Department of Applied Science and Technology
- Politecnico di Torino
- 10129 Turin
- Italy
| | - Alessandro Virga
- Department of Applied Science and Technology
- Politecnico di Torino
- 10129 Turin
- Italy
| | - Fabrizio Giorgis
- Department of Applied Science and Technology
- Politecnico di Torino
- 10129 Turin
- Italy
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Cao Q, Che R. Tailoring Au-Ag-S composite microstructures in one-pot for both SERS detection and photocatalytic degradation of plasticizers DEHA and DEHP. ACS APPLIED MATERIALS & INTERFACES 2014; 6:7020-7027. [PMID: 24820345 DOI: 10.1021/am501898u] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report a facile single-step one-pot solvothermal process for tailoring the Au-Ag-S microstructures as bifunctional substrates for both surface-enhanced Raman scattering (SERS) detection and photocatalytic degradation of plasticizers diethylhexyl phthalate (DEHP) and diethylhexyl adipate (DEHA). Typically, two different microstructures, the Ag2S particles inlaid Au microflowers (Ag2S-Au MFs) and Au particles decorated AgAuS microsheets (Au-AgAuS MSs) were obtained. The Ag2S-Au MF substrates finally turned out to provide 0.9 × 10(-9) and 0.9 × 10(-7) M of the limits of detection (LODs) for DEHP and DEHA in orange juice. And on the other hand, the Au-AgAuS MSs achieved complete degradation of DEHP and DEHA (1 × 10(-5) M) after 20 and 25 min of UV light irradiation, respectively. It is believed that the facile preparation and appreciable SERS and catalytic activities of these Au-Ag-S microstructures would make much sense to develop novel multifunctional sensing and monitoring devices.
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Affiliation(s)
- Qi Cao
- Laboratory of Advanced Materials, Fudan University , Shanghai 200438, People's Republic of China
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The effect of dielectric constants on noble metal/semiconductor SERS enhancement: FDTD simulation and experiment validation of Ag/Ge and Ag/Si substrates. Sci Rep 2014; 4:4052. [PMID: 24514430 PMCID: PMC3920278 DOI: 10.1038/srep04052] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Accepted: 01/20/2014] [Indexed: 12/17/2022] Open
Abstract
The finite-difference time-domain (FDTD) method was employed to simulate the electric field distribution for noble metal (Au or Ag)/semiconductor (Ge or Si) substrates. The simulation showed that noble metal/Ge had stronger SERS enhancement than noble metal/Si, which was mainly attributed to the different dielectric constants of semiconductors. In order to verify the simulation, Ag nanoparticles with the diameter of ca. 40 nm were grown on Ge or Si wafer (Ag/Ge or Ag/Si) and employed as surface-enhanced Raman scattering substrates to detect analytes in solution. The experiment demonstrated that both the two substrates exhibited excellent performance in the low concentration detection of Rhodamine 6G. Besides, the enhancement factor (1.3 × 109) and relative standard deviation values (less than 11%) of Ag/Ge substrate were both better than those of Ag/Si (2.9 × 107 and less than 15%, respectively), which was consistent with the FDTD simulation. Moreover, Ag nanoparticles were grown in-situ on Ge substrate, which kept the nanoparticles from aggregation in the detection. To data, Ag/Ge substrates showed the best performance for their sensitivity and uniformity among the noble metal/semiconductor ones.
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Xie Y, Meng Y. SERS performance of graphene oxide decorated silver nanoparticle/titania nanotube array. RSC Adv 2014. [DOI: 10.1039/c4ra07865a] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
A schematic illustrates the preparation of recyclable GO/Ag/TiO2 NTA substrate keeping both active SERS detection and photocatalytic self-cleaning properties.
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Affiliation(s)
- Yibing Xie
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing 211189, China
- Suzhou Research Institute of Southeast University
- Suzhou 215123, China
| | - Yujie Meng
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing 211189, China
- Suzhou Research Institute of Southeast University
- Suzhou 215123, China
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Li R, Zhou A, Lu Q, Yang C, Zhang J. In situ monitoring and analysis of the photocatalytic degradation process and mechanism on recyclable Au NPs-TiO2 NTs substrate using surface-enhanced Raman scattering. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.06.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Tu M, Abbood HA, Zhu Z, Li H, Gao Z. Investigation of the photocatalytic effect of zinc oxide nanoparticles in the presence of nitrite. JOURNAL OF HAZARDOUS MATERIALS 2013; 244-245:311-321. [PMID: 23270955 DOI: 10.1016/j.jhazmat.2012.11.048] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Revised: 11/17/2012] [Accepted: 11/21/2012] [Indexed: 06/01/2023]
Abstract
Zinc oxide nanoparticles are widely used in sunscreen products because of their chemical stability and capability of blocking harmful ultraviolet rays. However, zinc oxide nanoparticles can also generate reactive species under ultraviolet irradiation. Because nitrite can form reactive nitrogen species under oxidative stress and because it exists in perspiration and cosmetics, we studied the effects of nitrites on the photocatalytic damage of zinc oxide nanoparticles (50 nm and 90 nm) to bovine serum albumin and human keratinocyte cells under ultraviolet irradiation (365 nm and 254 nm). The results indicate that nitrite plays an enhancing role in photocatalytic damage by breaking amino acid residues and promoting protein oxidation and nitration. The concentrations of zinc oxide and nitrite, the irradiation light and duration, and the pH of the medium are important factors influencing this photocatalytic damage. Size effects of ZnO nanoparticles on bovine serum albumin and keratinocyte cells are different. It is speculated that the extent of photo-damage is partially dependent on the aggregation of zinc oxide. These findings may be valuable for understanding potential risks of applying zinc oxide nanoparticle-containing sunscreens to human skin under sunlight exposure.
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Affiliation(s)
- Min Tu
- School of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, 1037 Luoyu Road, Wuhan 430074, People's Republic of China
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Kiran V, Sampath S. Enhanced Raman spectroscopy of molecules adsorbed on carbon-doped TiO₂ obtained from titanium carbide: a visible-light-assisted renewable substrate. ACS APPLIED MATERIALS & INTERFACES 2012; 4:3818-3828. [PMID: 22738214 DOI: 10.1021/am300349k] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Titanium carbide (TiC) is an electrically conducting material with favorable electrochemical properties. In the present studies, carbon-doped TiO(2) (C-TiO(2)) has been synthesized from TiC particles, as well as TiC films coated on stainless steel substrate via thermal annealing under various conditions. Several C-TiO(2) substrates are synthesized by varying experimental conditions and characterized by UV-visible spectroscopy, photoluminescence, X-ray diffraction, and X-ray photoelectron spectroscopic techniques. C-TiO(2) in the dry state (in powder form as well as in film form) is subsequently used as a substrate for enhancing Raman signals corresponding to 4-mercaptobenzoic acid and 4-nitrothiophenol by utilizing chemical enhancement based on charge-transfer interactions. Carbon, a nonmetal dopant in TiO(2), improves the intensities of Raman signals, compared to undoped TiO(2). Significant dependence of Raman intensity on carbon doping is observed. Ameliorated performance obtained using C-TiO(2) is attributed to the presence of surface defects that originate due to carbon as a dopant, which, in turn, triggers charge transfer between TiO(2) and analyte. The C-TiO(2) substrates are subsequently regenerated for repetitive use by illuminating an analyte-adsorbed substrate with visible light for a period of 5 h.
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Affiliation(s)
- Vankayala Kiran
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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Tan EZ, Yin PG, You TT, Wang H, Guo L. Three dimensional design of large-scale TiO(2) nanorods scaffold decorated by silver nanoparticles as SERS sensor for ultrasensitive malachite green detection. ACS APPLIED MATERIALS & INTERFACES 2012; 4:3432-7. [PMID: 22708788 DOI: 10.1021/am3004126] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
We have designed a large-scale three-dimensional (3D) hybrid nanostructure as surface-enhanced Raman scattering (SERS) sensor by decorating silver nanoparticles on TiO2 nanorods scaffold (Ag/TiO2). Taking p-mercaptobenzoic acid (PMBA) as the probe molecule, the SERS signals collected by point-to-point and time mapping modes show that the relative standard deviation (RSD) in the intensity of the main Raman vibration modes (1079, 1586 cm(-1)) is less than 10%, demonstrating good spatial uniformity and time stability. This hybrid substrate also exhibits excellent SERS enhancement effect due to the formation of high-density hot spots among the AgNPs, which was proved by finite-difference time-domain (FDTD) simulations. The application of the new nanostructures as SERS sensors was demonstrated with the detection of malachite green (MG). The quantification of MG can be accomplished with the detection limit of 1 × 10(-12) M based on the Raman intensity. The results show that the Ag/TiO2 nanostructure can be a promising candidate for SERS sensor.
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Affiliation(s)
- En-Zhong Tan
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of the Ministry of Education, School of Chemistry and Environment, Beihang University , Beijing 100191, PR China
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Zhu H, Du M, Zou M, Xu C, Fu Y. Green synthesis of Au nanoparticles immobilized on halloysite nanotubes for surface-enhanced Raman scattering substrates. Dalton Trans 2012; 41:10465-71. [DOI: 10.1039/c2dt30998j] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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