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Mahadev AP, Kavitha C, Perutil JR, John NS, Sudheeksha HC. Flower-like Ag-decked non-stoichiometric Bi 2O 3-x/rGO hybrid nanocomposite SERS substrates for an effective detection of Rhodamine 6G dye molecules. RSC Adv 2024; 14:11951-11968. [PMID: 38623299 PMCID: PMC11017965 DOI: 10.1039/d4ra01286k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 03/22/2024] [Indexed: 04/17/2024] Open
Abstract
In early years, SERS-active substrates were generally noble metals. However, their practical applications were limited due to their poor biocompatibility, low uniformity and high cost. Recently, the utilization of semiconductor SERS-active substrates has greatly expanded the applications of SERS in many fields. However, metal-free SERS-active substrates have a low enhancement factor (EF), which can be overcome by adjusting their oxygen deficiency or through the effective preparation of non-stoichiometric semiconducting oxide materials. This is the key strategy and may work as an efficient and simple way to achieve high sensitivity and obtain an enhancement factor (G-factor) comparable to that of noble metals. Here, we report the preparation of flower-like rGO-Bi2O3/Bi2O2.75 and rGO-Ag-Bi2O3/Bi2O2.75 hybrid thin film nanocomposites using a liquid/liquid interface method (LLI) for the first time. In addition to the synergic effect of different enhancement mechanisms, the 3-D flower-like morphology of the substrate shows more favourable properties to improve the G-factor due to the existence of more hotspots. The rGO-Ag-Bi2O3/Bi2O2.75 hybrid thin-film nanocomposites show an EF of 1.8 × 109 with a detection ability of up to 1 nM towards Rhodamine 6G (R6G), which is highly toxic to humans and the aquatic environment.
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Affiliation(s)
- Awati Prema Mahadev
- Department of Chemistry R&D, Physics R&D, Centre for Advanced Materials Research, B.M.S. Institute of Technology & Management, An Autonomous Under Visvesvaraya Technological University Bangalore 560064 India
| | - C Kavitha
- Department of Chemistry R&D, Physics R&D, Centre for Advanced Materials Research, B.M.S. Institute of Technology & Management, An Autonomous Under Visvesvaraya Technological University Bangalore 560064 India
| | - Jil Rose Perutil
- Centre for Nano and Soft Matter Sciences Shivanapura Bengaluru 562162 India
| | - Neena S John
- Centre for Nano and Soft Matter Sciences Shivanapura Bengaluru 562162 India
| | - H C Sudheeksha
- Horiba India Pvt. Ltd-IISc Industry Unit Bangalore 560012 India
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2
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Sun C, Guo N, Ye L, Miao L, Cao M, Yan M, Ding J. Quantitative detection of phenol red by surface enhanced Raman spectroscopy based on improved GA-BP. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 296:122663. [PMID: 37001264 DOI: 10.1016/j.saa.2023.122663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 03/19/2023] [Accepted: 03/20/2023] [Indexed: 06/19/2023]
Abstract
Phenol red (PR) is generally used as an acid-base indicator and a printing and dyeing colorant. When its content exceeds a certain concentration in water, it will cause great damage to the human body. Therefore, it is very important to detect the content of PR in water. The advantage of surface enhanced Raman scattering (SERS) is detecting samples quickly, non-destructive and high sensitivity without sample pre-treatment. SERS has attracted great attention in all fields of detection and analysis. In this paper, the method of attaching silver nanoparticles to metallic single-walled carbon nanotubes form carbon nanotubes/silver nanoparticles (CNTs/AgNPs) structure and then combining it with silica sheet is proposed. SERS substrate with silica/carbon nanotubes/silver nanoparticles (SiO2/CNTs/AgNPs) composite structure has extremely high reinforcement effect. In the quantitative analysis of the detected substance, mathematical fitting or machine learning is used to find the relationship between the intensity of Raman signal and the concentration of the detected substance. The BP neural network optimized by genetic algorithm (GA-BP) is designed in this study. The weights of GA-BP to enhance the robustness of BP neural network, the method of adaptive learning rate and the number of hidden nodes is set to solve the problem that GA-BP is easy to fall into local optimum, thus establishing a quantitative analysis model of PR solution concentration. The model can detect different concentrations of PR solutions with high accuracy quickly, simply and sensitively. Finally, compared with other published quantitative models, GA-BP correlation coefficient R2 determined by the training results of the model is 0.99996, and the root mean square error of the prediction is RMSEP = 0.002510, which is 0.0005 higher than the mathematical fitting method, it shows better performance. A reliable idea for the preparation of SERS substrate and online detection of PR concentration in water proposed in this study.
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Affiliation(s)
- Chao Sun
- State Key Laboratory of Precision Blasting, Jianghan University, China; College of Intelligent Manufacturing, Jianghan University, Wuhan 430056, China
| | - Naiyu Guo
- State Key Laboratory of Precision Blasting, Jianghan University, China
| | - Li Ye
- State Key Laboratory of Precision Blasting, Jianghan University, China
| | - Longxin Miao
- State Key Laboratory of Precision Blasting, Jianghan University, China
| | - Mian Cao
- State Key Laboratory of Precision Blasting, Jianghan University, China
| | - Mingdie Yan
- State Key Laboratory of Precision Blasting, Jianghan University, China
| | - Jianjun Ding
- State Key Laboratory of Precision Blasting, Jianghan University, China; College of Intelligent Manufacturing, Jianghan University, Wuhan 430056, China.
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3
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Ge Y, Wang F, Yang Y, Xu Y, Ye Y, Cai Y, Zhang Q, Cai S, Jiang D, Liu X, Liedberg B, Mao J, Wang Y. Atomically Thin TaSe 2 Film as a High-Performance Substrate for Surface-Enhanced Raman Scattering. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2107027. [PMID: 35246940 DOI: 10.1002/smll.202107027] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 02/08/2022] [Indexed: 06/14/2023]
Abstract
An atomically thin TaSe2 sample, approximately containing two to three layers of TaSe2 nanosheets with a diameter of 2.5 cm is prepared here for the first time and applied on the detection of various Raman-active molecules. It achieves a limit of detection of 10-10 m for rhodamine 6G molecules. The excellent surface-enhanced Raman scattering (SERS) performance and underlying mechanism of TaSe2 are revealed using spectrum analysis and density functional theory. The large adsorption energy and the abundance of filled electrons close to the Fermi level are found to play important roles in the chemical enhancement mechanism. Moreover, the TaSe2 film enables highly sensitive detection of bilirubin in serum and urine samples, highlighting the potential of using 2D SERS substrates for applications in clinical diagnosis, for example, in the diagnosis of jaundice caused by excess bilirubin in newborn children.
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Affiliation(s)
- Yuancai Ge
- School of Biomedical Engineering, School of Ophthalmology and Optometry, Wenzhou Medical University, Xueyuan Road 270, Wenzhou, 325027, China
| | - Fei Wang
- College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Ying Yang
- School of Biomedical Engineering, School of Ophthalmology and Optometry, Wenzhou Medical University, Xueyuan Road 270, Wenzhou, 325027, China
| | - Yi Xu
- State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, School of Physics, Peking University, Beijing, 100871, China
| | - Ying Ye
- School of Biomedical Engineering, School of Ophthalmology and Optometry, Wenzhou Medical University, Xueyuan Road 270, Wenzhou, 325027, China
| | - Yu Cai
- School of Biomedical Engineering, School of Ophthalmology and Optometry, Wenzhou Medical University, Xueyuan Road 270, Wenzhou, 325027, China
| | - Qingwen Zhang
- Wenzhou Institute, University of Chinese Academy of Sciences, Xinsan Road 16, Wenzhou, 325001, China
| | - Shengying Cai
- Wenzhou Institute, University of Chinese Academy of Sciences, Xinsan Road 16, Wenzhou, 325001, China
| | - DanFeng Jiang
- Wenzhou Institute, University of Chinese Academy of Sciences, Xinsan Road 16, Wenzhou, 325001, China
| | - Xiaohu Liu
- School of Biomedical Engineering, School of Ophthalmology and Optometry, Wenzhou Medical University, Xueyuan Road 270, Wenzhou, 325027, China
| | - Bo Liedberg
- Centre for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Jian Mao
- College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Yi Wang
- School of Biomedical Engineering, School of Ophthalmology and Optometry, Wenzhou Medical University, Xueyuan Road 270, Wenzhou, 325027, China
- Wenzhou Institute, University of Chinese Academy of Sciences, Xinsan Road 16, Wenzhou, 325001, China
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4
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Chen N, Yuan Y, Lu P, Wang L, Zhang X, Chen H, Ma P. Detection of carbamazepine in saliva based on surface-enhanced Raman spectroscopy. BIOMEDICAL OPTICS EXPRESS 2021; 12:7673-7688. [PMID: 35003859 PMCID: PMC8713680 DOI: 10.1364/boe.440939] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 10/18/2021] [Accepted: 10/20/2021] [Indexed: 06/12/2023]
Abstract
Carbamazepine (CBZ) is a commonly used drug for the treatment of epilepsy. Due to the narrow effective range, CBZ concentration was usually monitored with blood draw from patients. Frequent blood draw is inconvenient and causes physical and psychological pain. Therefore, highly-sensitive, rapid, label-free, and non-invasive drug detection methods can be alternatives to bring a relief. In this work, we have proposed a method for the non-invasive detection of CBZ using surface-enhanced Raman spectroscopy (SERS). Gold-silver core-shell nanomaterial substrates were prepared and optimized. Salivary CBZ concentration was measured with SERS as a non-invasive alternative to blood draw. The results showed that there was a linear relationship between SERS response and CBZ concentration in the entire measured range of 10-1 ∼ 10-8 mol/L. The detection limit of this method was 1.26 × 10-9 mol/L. Satisfactory repeatability and stability were also demonstrated. Due to its high sensitivity and ease of operation, the proposed method can serve as an alternative to blood draw for non-invasively monitoring CBZ concentration. It also has great potentials in many other applications of biomedical sciences.
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Affiliation(s)
- Ning Chen
- Key Laboratory of Optical Technology and
Instrument for Medicine, Ministry of Education, College of
Optical-Electrical and Computer Engineering, University
of Shanghai for Science and Technology, Shanghai 200093,
China
| | - Yanbing Yuan
- Key Laboratory of Optical Technology and
Instrument for Medicine, Ministry of Education, College of
Optical-Electrical and Computer Engineering, University
of Shanghai for Science and Technology, Shanghai 200093,
China
| | - Ping Lu
- Key Laboratory of Optical Technology and
Instrument for Medicine, Ministry of Education, College of
Optical-Electrical and Computer Engineering, University
of Shanghai for Science and Technology, Shanghai 200093,
China
| | - Luyao Wang
- Key Laboratory of Optical Technology and
Instrument for Medicine, Ministry of Education, College of
Optical-Electrical and Computer Engineering, University
of Shanghai for Science and Technology, Shanghai 200093,
China
| | - Xuedian Zhang
- Key Laboratory of Optical Technology and
Instrument for Medicine, Ministry of Education, College of
Optical-Electrical and Computer Engineering, University
of Shanghai for Science and Technology, Shanghai 200093,
China
- Shanghai Institute of Intelligent Science
and Technology, Tongji University, Shanghai
200092, China
| | - Hui Chen
- Key Laboratory of Optical Technology and
Instrument for Medicine, Ministry of Education, College of
Optical-Electrical and Computer Engineering, University
of Shanghai for Science and Technology, Shanghai 200093,
China
| | - Pei Ma
- Key Laboratory of Optical Technology and
Instrument for Medicine, Ministry of Education, College of
Optical-Electrical and Computer Engineering, University
of Shanghai for Science and Technology, Shanghai 200093,
China
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5
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Wang J, Ahmad W, Mehedi Hassan M, Zareef M, Viswadevarayalu A, Arslan M, Li H, Chen Q. Landing microextraction sediment phase onto surface enhanced Raman scattering to enhance sensitivity and selectivity for chromium speciation in food and environmental samples. Food Chem 2020; 323:126812. [PMID: 32334303 DOI: 10.1016/j.foodchem.2020.126812] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Revised: 02/15/2020] [Accepted: 04/13/2020] [Indexed: 01/15/2023]
Abstract
The current study explores the first full mode liquid microextraction technique coupled with surface-enhanced Raman spectroscopy (SERS), and has been successfully applied for chromium speciation in food and environmental matrices. Herein, chromium as chlorochromate anion [CrO3Cl]- and the cationic rhodamine 6G [RG]+ dye has been extracted in organic phase as a complex ion associate [RG+.CrO3Cl-.nS]org at pH ≤ 1.0. Afterwards, the extracted phase was deposited on the surface of the nano-flower shaped silver nanoparticles substrate and the SERS response was monitored against the reagent blank at 1505 cm-1. Substrate characterizations, reaction mechanism assignment, stoichiometry, speciation, analytical applications, selectivity and validation were performed. The analytical procedure exhibits a detection limit of 0.03 µg L-1 under the optimized experimental conditions. The accuracy of the proposed strategy was validated by inductively coupled plasma optical emission spectrometry method using student's t- and F tests at 95% confidence.
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Affiliation(s)
- Jingjing Wang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Waqas Ahmad
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Md Mehedi Hassan
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Muhammad Zareef
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | | | - Muhammad Arslan
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Huanhuan Li
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China.
| | - Quansheng Chen
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China.
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6
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Xiao G, Li L, Yan A, He X. Direct detection of melamine in infant formula milk powder solution based on SERS effect of silver film over nanospheres. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 223:117269. [PMID: 31247461 DOI: 10.1016/j.saa.2019.117269] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 06/04/2019] [Accepted: 06/10/2019] [Indexed: 06/09/2023]
Abstract
A direct and sensitive method to detect melamine in infant formula milk powder solution based on the SERS effect of silver film over nanospheres (AgFON) was developed. AgFON was prepared by vacuum magnetron sputtering and dip-coating methods. The surface morphology and roughness were characterized by using scanning electron microscope and atomic force microscope. AgFON was used as a substrate to detect the SERS spectra of melamine in infant formula milk powder solution directly without any pretreatments. Semi-quantitative analyses of melamine with various concentrations in milk powder solution were carried out. A good linearity with correlation coefficient of 0.9926 between peak intensity and concentration was obtained from 2 to 25 mg/L. Furthermore, the as-prepared AgFON substrate had good uniformity with relative standard deviation value of 5.56% collected from ten randomly selected positions. The electric field distribution of AgFON was simulated by finite difference time domain solution, which revealed that the huge enhancement of Raman signals was ascribed to the high-density hot spots of the substrate.
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Affiliation(s)
- Guina Xiao
- Department of Physics, Shanghai Normal University, Shanghai 200234, PR China.
| | - Ling Li
- Department of Physics, Shanghai Normal University, Shanghai 200234, PR China
| | - Aimin Yan
- Department of Physics, Shanghai Normal University, Shanghai 200234, PR China
| | - Xiaoyong He
- Department of Physics, Shanghai Normal University, Shanghai 200234, PR China
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7
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A calcium alginate sponge with embedded gold nanoparticles as a flexible SERS substrate for direct analysis of pollutant dyes. Mikrochim Acta 2019; 186:64. [DOI: 10.1007/s00604-018-3173-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 12/12/2018] [Indexed: 11/26/2022]
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8
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Optical and biomedical properties of eco-friendly metal nanostructures synthesized using Trigonella foenum-graecum leaf extract. APPLIED NANOSCIENCE 2018. [DOI: 10.1007/s13204-018-0821-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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9
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Botta R, Chindaudom P, Eiamchai P, Horprathum M, Limwichean S, Chananonnawathorn C, Patthanasettakul V, Kaewseekhao B, Faksri K, Nuntawong N. Tuberculosis determination using SERS and chemometric methods. Tuberculosis (Edinb) 2018. [PMID: 29523323 DOI: 10.1016/j.tube.2017.12.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Nanostructures have been multiplying the advantages of Raman spectroscopy and further amplify the advantages of Raman spectroscopy is a continuous effort focused on the appropriate design of nanostructures. Herein, we designed different shapes of plasmonic nanostructures such as Vertical, Zig Zag, Slant nanorods and Spherical nanoparticles employing the DC magnetron sputtering system as SERS-active substrates for ultrasensitive detection of target molecules. The fabricated plasmonic nanostructures sensitivity and uniformity were exploited by reference dye analyte. These nanostructures were utilized in the label free detection of infectious disease, Tuberculosis (TB). For the first time, TB detection from serum samples using SERS has been demonstrated. Various multivariate statistical methods such as principal component analysis, support vector machine, decision tree and random forest were developed and tested their ability to discriminate the healthy and active TB samples. The results demonstrate the performance of the SERS spectra, chemometric methods and potential of the method in clinical diagnosis.
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Affiliation(s)
- Raju Botta
- National Electronics and Computer Technology Center (NECTEC), Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, Thailand.
| | - Pongpan Chindaudom
- National Electronics and Computer Technology Center (NECTEC), Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, Thailand
| | - Pitak Eiamchai
- National Electronics and Computer Technology Center (NECTEC), Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, Thailand
| | - Mati Horprathum
- National Electronics and Computer Technology Center (NECTEC), Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, Thailand
| | - Saksorn Limwichean
- National Electronics and Computer Technology Center (NECTEC), Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, Thailand
| | - Chanunthorn Chananonnawathorn
- National Electronics and Computer Technology Center (NECTEC), Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, Thailand
| | - Viyapol Patthanasettakul
- National Electronics and Computer Technology Center (NECTEC), Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, Thailand
| | - Benjawan Kaewseekhao
- Department of Microbiology and Research and Diagnostic Center for Emerging Infectious Diseases (RCEID), Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Kiatichai Faksri
- Department of Microbiology and Research and Diagnostic Center for Emerging Infectious Diseases (RCEID), Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Noppadon Nuntawong
- National Electronics and Computer Technology Center (NECTEC), Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, Thailand
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Patra S, Ravulapalli S, Hahm MG, Tadi KK, Narayanan TN. On the development of multifunctional luminescent supramolecular hydrogel of gold and egg white. NANOTECHNOLOGY 2016; 27:415603. [PMID: 27608886 DOI: 10.1088/0957-4484/27/41/415603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Highly stable, luminescent, and printable/paintable supramolecular egg white hydrogel-based surface enhanced Raman scattering (SERS) matrix is created by an in situ synthesis of gold clusters inside a luminescent egg white hydrogel (Au-Gel). The synthesis of stable luminescent egg-white-based hydrogel, where the hydrogel can act as a three dimensional (3D) matrix, using a simple cross-linking chemistry, has promising application in the biomedical field including in 3D cell culturing. Furthermore, this functional hydrogel is demonstrated for micromolar-level detection of Rhodamine 6G using the SERS technique, where Au-Gel is painted over a flexible cellulose pad.
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Affiliation(s)
- Sudeshna Patra
- TIFR-Centre for Interdisciplinary Sciences (TCIS), Tata Institute of Fundamental Research, Hyderabad-500075, India
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11
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Silver nanocluster films for glucose sensing by Surface Enhanced Raman Scattering (SERS). SENSING AND BIO-SENSING RESEARCH 2016. [DOI: 10.1016/j.sbsr.2016.05.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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12
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Pramanik S, Bhalla V, Kumar M. Hexaphenylbenzene-Stabilized Luminescent Silver Nanoclusters: A Potential Catalytic System for the Cycloaddition of Terminal Alkynes with Isocyanides. ACS APPLIED MATERIALS & INTERFACES 2015; 7:22786-22795. [PMID: 26420310 DOI: 10.1021/acsami.5b04377] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A hexaphenylbenzene (HPB)-based derivative bearing thiol groups has been designed and synthesized that undergoes aggregation-induced emission enhancement in mixed aqueous media to form rodlike fluorescent aggregates. These rodlike aggregates behave as a "not quenched" probe for the detection of silver ions and further act as reactors and stabilizers for reducing-agent-free preparation of blue luminescent silver nanoclusters at room temperature. The utilization of fluorescent supramolecular aggregates for the preparation of Ag NCs in mixed aqueous media is unprecedented in the literature. Moreover, the wet chemical method that we are reporting in the present paper for the preparation of luminescent silver nanoclusters is better than the other methods reported in the literature. Further, these in situ generated Ag NCs showed exceptional catalytic activity in the preparation of pyrroles involving cocyclization of isocyanides and terminal alkynes. Interestingly, the catalytic efficiency of in situ generated Ag NCs was found to be better than the other catalytic systems reported in the literature.
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Affiliation(s)
- Subhamay Pramanik
- Department of Chemistry, UGC-Centre for Advanced Studies-II, Guru Nanak Dev University , Amritsar 143005, Punjab, India
| | - Vandana Bhalla
- Department of Chemistry, UGC-Centre for Advanced Studies-II, Guru Nanak Dev University , Amritsar 143005, Punjab, India
| | - Manoj Kumar
- Department of Chemistry, UGC-Centre for Advanced Studies-II, Guru Nanak Dev University , Amritsar 143005, Punjab, India
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13
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Kuntumalla MK, Srikanth VVSS, Ravulapalli S, Gangadharini U, Ojha H, Desai NR, Bansal C. SERS activity of Ag decorated nanodiamond and nano-β-SiC, diamond-like-carbon and thermally annealed diamond thin film surfaces. Phys Chem Chem Phys 2015; 17:21331-6. [PMID: 25691097 DOI: 10.1039/c4cp05236f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
In the recent past surface enhanced Raman scattering (SERS) based bio-sensing has gained prominence owing to the simplicity and efficiency of the SERS technique. Dedicated and continuous research efforts have been made to develop SERS substrates that are not only stable, durable and reproducible but also facilitate real-time bio-sensing. In this context diamond, β-SiC and diamond-like-carbon (DLC) and other related thin films have been promoted as excellent candidates for bio-technological applications including real time bio-sensing. In this work, SERS activities of nanodiamond, nano-β-SiC, DLC, thermally annealed diamond thin film surfaces were examined. DLC and thermally annealed diamond thin films were found to show SERS activity without any metal nanostructures on their surfaces. The observed SERS activities of the considered surfaces are explained in terms of the electromagnetic enhancement mechanism and charge transfer resonance process.
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Affiliation(s)
- Mohan Kumar Kuntumalla
- School of Engineering Sciences and Technology (SEST), University of Hyderabad, Hyderabad 500046, India.
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14
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Kavitha C, Bramhaiah K, John NS, Ramachandran B. Low cost, ultra-thin films of reduced graphene oxide–Ag nanoparticle hybrids as SERS based excellent dye sensors. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.04.026] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Yan Z, Peng Y, Wu Y, Di J. Controllable Electrochemical Synthesis of Silver Nanoparticles on Indium-Tin-Oxide-Coated Glass. ChemElectroChem 2015. [DOI: 10.1002/celc.201402369] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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16
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Botta R, Upender G, Bansal C. Silver nanocluster films on ITO coated glass as novel substrates for the detection of molecules using Surface Enhanced Raman Scattering (SERS). ACTA ACUST UNITED AC 2015. [DOI: 10.1088/1757-899x/73/1/012143] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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17
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Botta R, Rajanikanth A, Bansal C. Surface Enhanced Raman Scattering studies of l-amino acids adsorbed on silver nanoclusters. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2014.10.052] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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19
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Botti S, Cantarini L, Almaviva S, Puiu A, Rufoloni A. Assessment of SERS activity and enhancement factors for highly sensitive gold coated substrates probed with explosive molecules. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2013.12.063] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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20
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Tan Y, Gu J, Xu W, Chen Z, Liu D, Liu Q, Zhang D. Reduction of CuO butterfly wing scales generates Cu SERS substrates for DNA base detection. ACS APPLIED MATERIALS & INTERFACES 2013; 5:9878-82. [PMID: 24080166 DOI: 10.1021/am402699c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We prepare three-dimensional Cu plasmonic structures via a reduction of CuO photonic crystals replicated from butterfly wing scales. These Cu superstructures with high purity provide surface-enhanced Raman scattering (SERS) substrates for the label-free detection of DNA bases down to a micromolar level, which is achieved for the first time on Cu and even comparable to the detection-sensitivity for DNA bases on some Ag substrates. The generation of such superstructures has provided a substantial step for the biotemplated SERS substrates with high sensitivity, high reproducibility, and ultra-low cost to detect biomolecules, and presented affordable high-quality routine SERS consumables for corresponding biolaboratories.
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Affiliation(s)
- Yongwen Tan
- State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University , Shanghai, 200240, P. R. China
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Silver nano islands enhanced Raman scattering on large area grating substrates fabricated by two beam laser interference. Chem Res Chin Univ 2013. [DOI: 10.1007/s40242-013-3080-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Dong P, Lin Y, Deng J, Di J. Ultrathin gold-shell coated silver nanoparticles onto a glass platform for improvement of plasmonic sensors. ACS APPLIED MATERIALS & INTERFACES 2013; 5:2392-2399. [PMID: 23477284 DOI: 10.1021/am4004254] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A facile and effective approach for the improvement of localized surface plasmon resonance (LSPR) biosensors based on silver-core and gold-shell nanoparticles (Ag@AuNPs) on a glass substrate was investigated. Silver nanoparticles (core) with thin gold shells on a transparent indium tin oxide (ITO) coated glass surface were prepared by sequential electrodeposition, and the influence of the thickness of the gold shell was systematically investigated. The experimental results indicate that the properties of an LSPR band of ultrathin (∼1.3 nm) gold-shell coated silver nanoparticles are very similar to those of silver nanoparticles alone. The refractive index (RI) sensitivities of the metal nanostructures are calculated as 123 and 220 nm/RIU for the silver cores (∼480 nm of LSPR peak) and Ag@AuNPs (∼503 nm of LSPR peak), respectively, on the ITO substrate. The RI sensitivity of Ag@AuNPs was significantly enhanced by coating the silver nanoparticles with an ultrathin gold shell. This core-shell platform was also applied to the fabrication of biosensors. Thus, this strategy can be used to construct inexpensive, stable, versatile, and sensitive LSPR biosensors.
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Affiliation(s)
- Peipei Dong
- College of Chemistry, Chemical Engineering and Material Science, Key Lab of Health Chemistry and Molecular Diagnosis of Suzhou, Soochow University, Suzhou, Jiangsu 215123, People's Republic of China
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Nagashree KL, Lavanya R, Kavitha C, Narayanan NSV, Sampath S. Spontaneous formation of branched nanochains from room temperature molten amides: visible and near-IR active, SERS substrates for non-fluorescent and fluorescent analytes. RSC Adv 2013. [DOI: 10.1039/c3ra23378b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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Liu T, Xiao X, Wang P, Ji L, Yang C. Fiber surface enhanced Raman scattering sensor based on patterned biphasic gold–silver nanoalloys. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.09.068] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Sivapalan ST, Vella JH, Yang TK, Dalton MJ, Swiger RN, Haley JE, Cooper TM, Urbas AM, Tan LS, Murphy CJ. Plasmonic enhancement of the two photon absorption cross section of an organic chromophore using polyelectrolyte-coated gold nanorods. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:9147-54. [PMID: 22500968 DOI: 10.1021/la300762k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The effect of plasmonic enhancement on the two-photon absorption cross section of organic chromophores attached to polyelectrolyte-coated gold nanorods was investigated. The magnitudes of such enhancements were confirmed using single and two photon excitations of the chromophore molecules bound to polyelectrolyte-coated gold nanorods. By synthesizing two-, four-, six-, and eight-polyelectrolyte layer coated nanorods of a particular aspect ratio, the distance dependence of the evanescent electromagnetic field on molecular two-photon absorption was observed. Enhancements of 40-fold were observed for the chromophores nearest to the surface.
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Affiliation(s)
- Sean T Sivapalan
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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Sajanlal PR, Pradeep T. Functional hybrid nickel nanostructures as recyclable SERS substrates: detection of explosives and biowarfare agents. NANOSCALE 2012; 4:3427-37. [PMID: 22535435 DOI: 10.1039/c2nr30557g] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We present the synthesis of highly anisotropic nickel nanowires (NWs) and large area, free-standing carpets extending over cm(2) area by simple solution phase chemistry. The materials can be post-synthetically manipulated to produce hybrid tubes, wires, and carpets by galvanic exchange reactions with Au(3+), Ag(+), Pt(2+), and Pd(2+). All of these structures, especially the hybrid carpets and tubes, have been prepared in bulk and are surface enhanced Raman scattering (SERS) active substrates. Molecules of relevance such as dipicolinic acid (constituting 5-15% of the dry weight of bacterial spores of Bacillus anthracis), dinitrotoluene, hexahydro-1,3,5-triazine (RDX), and trinitrotoluene at nanomolar concentrations have been detected. An enhancement factor of ∼10(10) was observed for the Ni-Au nanocarpet. The reusability of the Ni-Au nanocarpet for SERS applications was tested 5 times without affecting the sensitivity. The reusability and sensitivity over large area have been demonstrated by Raman microscopy. Our method provides an easy and cost effective way to produce recyclable, large area, SERS active substrates with high sensitivity and reproducibility which can overcome the limitation of one-time use of traditional SERS substrates.
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Affiliation(s)
- P R Sajanlal
- DST Unit of Nanoscience (DST UNS), Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
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Upender G, Sathyavathi R, Raju B, Bansal C, Narayana Rao D. SERS study of molecules on Ag nanocluster films deposited on glass and silicon substrates by cluster deposition method. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2011.12.044] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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