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Sui H, Li M, Gao Y, Luo J, Ban F, Xu T, Fu S, Zhao CY, Wen H, Han C. Solvent-Driven Enrichment and Multiplex Analysis of Local Anesthetics by Thin-Layer Chromatography Coupled with Surface-Enhanced Raman Spectroscopy. Molecules 2025; 30:1585. [PMID: 40286164 PMCID: PMC11990880 DOI: 10.3390/molecules30071585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2025] [Revised: 03/29/2025] [Accepted: 03/31/2025] [Indexed: 04/29/2025] Open
Abstract
Local anesthetics have been widely used in clinical analgesia due to their ability to provide effective regional pain management. Accurate measurement of local anesthetics in body fluids is crucial for ensuring patient medication safety and optimizing therapeutic efficacy. Herein, we present a convenient, economical, sensitive, and efficient TLC-SERS method for multiplex determination of six kinds of anesthetics (pro) in human plasma, including procaine hydrochloride (Pro), tetracaine hydrochloride (Tet), dibucaine (Dib), mepivacaine hydrochloride (Mep), lidocaine hydrochloride (Lid), and ropivacaine hydrochloride (Rop). The TLC method was adopted to separate six local anesthetics effectively. In order to improve the sensitivity, TLC spots were concentrated into smaller ones using methanol through solvent-driven enrichment, then Ag NPs staining was applied to enriched spots for a strong and unique SERS response of each anesthetic. As a result, linear calibration curves of SERS intensity ratio versus negative logarithm of spotting amounts sampled on TLC plates were obtained, along with the lowest detectable amounts in this study were 1 ng (Pro), 10 pg (Tet), 10 ng (Dib), 50 ng (Mep), 50 ng (Lid), and 0.1 μg (Rop), which were up to 2 × 104 times more sensitive than our previous TLC-Raman method. Moreover, the method was successfully applied to human plasma samples, demonstrating the feasibility and potential for multiplex analysis of local anesthetics in clinical practice, criminal forensics, and aquaculture.
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Affiliation(s)
- Huimin Sui
- School of Pharmacy, Qiqihar Medical University, Qiqihar 161006, China; (H.S.); (M.L.); (Y.G.); (J.L.); (F.B.); (T.X.); (S.F.); (C.-Y.Z.); (H.W.)
- Postdoctoral Research Station, Qiqihar Institute of Medical and Pharmaceutical Sciences, Qiqihar 161006, China
| | - Miao Li
- School of Pharmacy, Qiqihar Medical University, Qiqihar 161006, China; (H.S.); (M.L.); (Y.G.); (J.L.); (F.B.); (T.X.); (S.F.); (C.-Y.Z.); (H.W.)
| | - Yangyang Gao
- School of Pharmacy, Qiqihar Medical University, Qiqihar 161006, China; (H.S.); (M.L.); (Y.G.); (J.L.); (F.B.); (T.X.); (S.F.); (C.-Y.Z.); (H.W.)
| | - Jie Luo
- School of Pharmacy, Qiqihar Medical University, Qiqihar 161006, China; (H.S.); (M.L.); (Y.G.); (J.L.); (F.B.); (T.X.); (S.F.); (C.-Y.Z.); (H.W.)
| | - Fangyuan Ban
- School of Pharmacy, Qiqihar Medical University, Qiqihar 161006, China; (H.S.); (M.L.); (Y.G.); (J.L.); (F.B.); (T.X.); (S.F.); (C.-Y.Z.); (H.W.)
| | - Tao Xu
- School of Pharmacy, Qiqihar Medical University, Qiqihar 161006, China; (H.S.); (M.L.); (Y.G.); (J.L.); (F.B.); (T.X.); (S.F.); (C.-Y.Z.); (H.W.)
| | - Shuang Fu
- School of Pharmacy, Qiqihar Medical University, Qiqihar 161006, China; (H.S.); (M.L.); (Y.G.); (J.L.); (F.B.); (T.X.); (S.F.); (C.-Y.Z.); (H.W.)
| | - Chao-Yang Zhao
- School of Pharmacy, Qiqihar Medical University, Qiqihar 161006, China; (H.S.); (M.L.); (Y.G.); (J.L.); (F.B.); (T.X.); (S.F.); (C.-Y.Z.); (H.W.)
| | - Hailin Wen
- School of Pharmacy, Qiqihar Medical University, Qiqihar 161006, China; (H.S.); (M.L.); (Y.G.); (J.L.); (F.B.); (T.X.); (S.F.); (C.-Y.Z.); (H.W.)
| | - Cuiyan Han
- School of Pharmacy, Qiqihar Medical University, Qiqihar 161006, China; (H.S.); (M.L.); (Y.G.); (J.L.); (F.B.); (T.X.); (S.F.); (C.-Y.Z.); (H.W.)
- Postdoctoral Research Station, Qiqihar Institute of Medical and Pharmaceutical Sciences, Qiqihar 161006, China
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Li L, Zhang T, Zhang L, Li W, Xu T, Wang L, Liu C, Li W, Li J, Lu R. One-step fabrication of flexible polyamide@Ag-dodecanethiol membranes for highly sensitive SERS detection of thiram. NANOTECHNOLOGY 2023; 35:105601. [PMID: 38035399 DOI: 10.1088/1361-6528/ad115e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Accepted: 11/30/2023] [Indexed: 12/02/2023]
Abstract
The surface-enhanced Raman scattering (SERS) is an effective spectral technology based on Raman scattering, but in practice, the commonly used SERS substrates suffer from low sensitivity and poor stability. In order to overcome these limitations, the SERS substrates were prepared from hydrophobic modification of dodecanethiol (C12) coupled with a flexible substrate, which was then used for pesticides detection in water. A flexible PA@Ag-C12 substrate with surface functionalization has been obtained. This work aims to investigate the self-assembly of Ag NPs modified with C12 onto polyamide (PA) membranes. Initially, transmission electron microscopy and scanning electron microscopy were used to analyze the substrate's morphology. Then with the help of an energy-dispersive spectrometer, sulfur content of C12-modified Ag NPs was analyzed. In order to determine the hydrophobicity of the modified Ag NPs, the contact angle was used. The results indicate that the gap between Ag NPs on PA membrane can be effectively controlled in order to prevent Ag NPs from aggregating. Furthermore, the finite-difference time-domain analysis indicated that the PA@Ag-C12 substrate exhibited a stronger electromagnetic enhancement effect than the PA@Ag substrate. By reducing NPs gaps on the PA membrane, the number of 'hot spots' increased, and the SERS performance of the substrate was improved as a result. According to the results of this study, this method can greatly reduce the manufacturing costs and time costs of the SERS substrate while maintaining the original uniformity. The SERS performance of PA@Ag-C12 was found to be three orders of magnitude better than that of PA@Ag direct self-assembled substrate, and the detection limit for Rhodamine 6G (R6G) was approximately 8.47 × 10-14M. On the basis of the PA@Ag-C12 substrate, thiram is detectable at a detection limit of 5.88 × 10-11M with a high degree of sensitivity and repeatability.
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Affiliation(s)
- Lujie Li
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China
| | - Tingting Zhang
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China
| | - Lan Zhang
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China
| | - Wei Li
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China
| | - Tao Xu
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China
| | - Lingling Wang
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, People's Republic of China
| | - Chang Liu
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei 230601, People's Republic of China
| | - Weihua Li
- School of Environment and Energy Engineering, Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, Anhui Jianzhu University, Hefei, People's Republic of China
| | - Jiansheng Li
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China
| | - Rui Lu
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China
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Kaja S, Nag A. Ag-Au-Cu Trimetallic Alloy Microflower: A Highly Sensitive SERS Substrate for Detection of Low Raman Scattering Cross-Section Thiols. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:16562-16573. [PMID: 37943256 DOI: 10.1021/acs.langmuir.3c02528] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
Trimetallic Ag-Au-Cu alloy microflowers (MFs) with various surface compositions were synthesized on a glass coverslip and used as efficient surface-enhanced Raman spectroscopy (SERS) substrates for highly sensitive label-free detection of smaller Raman scattering cross-section molecules, namely, L-cysteine and toxic thiophenols. MFs of different compositions were synthesized via appropriate mixing of metal-alkyl ammonium halide precursors followed by a single-step thermolysis at 350 °C. While the Ag percentage was kept constant at 90% for all the substrates, the composition of Au and Cu was varied between 1 and 9% sequentially. The synthesized MFs were thoroughly characterized by using field emission scanning electron microscopy (FE-SEM), wide-angle X-ray scattering, X-ray photoelectron spectroscopy (XPS), and X-ray fluorescence techniques. FE-SEM studies revealed that the MFs were present throughout the substrate, and the average size varied from 20 to 40 μm. XPS studies showed that the top surface of the alloy substrates was rich in either Au or Cu atoms, while Ag remained underneath. The performance of the trimetallic MFs as SERS substrates was evaluated using Rhodamine 6G as a probe molecule, which showed that the MFs with Ag-Au-Cu compositions 90-7-3 and 90-3-7 were found to be the best and of equal SERS efficiency. The SERS enhancement factor (EF) of both these MFs was found to be the same, approximately 9 × 107, when calculated using 1,2,3-benzatriazole as the probe molecule. Between the two, the trimetallic substrate with a higher Au percentage (Ag-Au-Cu as 90-7-3) was used for the sensitive SERS-based detection of thiols to exploit the strong Au-S binding interaction. By virtue of the high EF of the substrate, the inherently low Raman scattering cross-sections of the probe molecules were greatly enhanced in SERS mode. The 'limit of quantification (LOQ)' values were found to be 1 nM for aliphatic L-Cysteine and 1-0.1 pM for aromatic thiols using the trimetallic SERS sensor.
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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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Yang L, Lai Y, Cheung CI, Ye Z, Huang T, Wang Y, Chin Y, Chia Z, Chen Y, Li M, Tseng H, Tsai Y, Zhang Z, Chen K, Tsai B, Shieh D, Lee N, Tsai P, Huang C. Novel metal peroxide nanoboxes restrain Clostridioides difficile infection beyond the bactericidal and sporicidal activity. Bioeng Transl Med 2023; 8:e10593. [PMID: 38023694 PMCID: PMC10658501 DOI: 10.1002/btm2.10593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 07/26/2023] [Accepted: 07/30/2023] [Indexed: 12/01/2023] Open
Abstract
Clostridioides difficile spores are considered as the major source responsible for the development of C. difficile infection (CDI), which is associated with an increased risk of death in patients and has become an important issue in infection control of nosocomial infections. Current treatment against CDI still relies on antibiotics, which also damage normal flora and increase the risk of CDI recurrence. Therefore, alternative therapies that are more effective against C. difficile bacteria and spores are urgently needed. Here, we designed an oxidation process using H2O2 containing PBS solution to generate Cl- and peroxide molecules that further process Ag and Au ions to form nanoboxes with Ag-Au peroxide coat covering Au shell and AgCl core (AgAu-based nanoboxes). The AgAu-based nanoboxes efficiently disrupted the membrane structure of bacteria/spores of C. difficile after 30-45 min exposure to the highly reactive Ag/Au peroxide surface of the nano structures. The Au-enclosed AgCl provided sustained suppression of the growth of 2 × 107 pathogenic Escherichia coli for up to 19 days. In a fecal bench ex vivo test and in vivo CDI murine model, biocompatibility and therapeutic efficacy of the AuAg nanoboxes to attenuate CDI was demonstrated by restoring the gut microbiota and colon mucosal structure. The treatment successfully rescued the CDI mice from death and prevented their recurrence mediated by vancomycin treatment. The significant outcomes indicated that the new peroxide-derived AgAu-based nanoboxes possess great potential for future translation into clinical application as a new alternative therapeutic strategy against CDI.
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Affiliation(s)
- Li‐Xing Yang
- Department of PhotonicsNational Cheng Kung UniversityTainanTaiwan
- School of Dentistry and Institute of Oral MedicineNational Cheng Kung UniversityTainanTaiwan
| | - Yi‐Hsin Lai
- Institute of Basic MedicineNational Cheng Kung UniversityTainanTaiwan
| | - Chun In Cheung
- Department of PhotonicsNational Cheng Kung UniversityTainanTaiwan
| | - Zhi Ye
- Department of Medical Laboratory Science and BiotechnologyNational Cheng Kung UniversityTainanTaiwan
| | - Tzu‐Chi Huang
- Department of PhotonicsNational Cheng Kung UniversityTainanTaiwan
| | - Yu‐Chin Wang
- Department of Medical Laboratory Science and BiotechnologyNational Cheng Kung UniversityTainanTaiwan
| | - Yu‐Cheng Chin
- Department of PhotonicsNational Cheng Kung UniversityTainanTaiwan
| | - Zi‐Chun Chia
- Department of PhotonicsNational Cheng Kung UniversityTainanTaiwan
| | - Ya‐Jyun Chen
- Department of PhotonicsNational Cheng Kung UniversityTainanTaiwan
| | - Meng‐Jia Li
- Institute of Basic MedicineNational Cheng Kung UniversityTainanTaiwan
| | - Hsiu‐Ying Tseng
- Department of Medical Laboratory Science and BiotechnologyNational Cheng Kung UniversityTainanTaiwan
| | - Yi‐Tseng Tsai
- Department of PhotonicsNational Cheng Kung UniversityTainanTaiwan
| | - Zhi‐Bin Zhang
- Department of PhotonicsNational Cheng Kung UniversityTainanTaiwan
| | - Kuan‐Hsu Chen
- Department of PhotonicsNational Cheng Kung UniversityTainanTaiwan
| | - Bo‐Yang Tsai
- Institute of Basic MedicineNational Cheng Kung UniversityTainanTaiwan
| | - Dar‐Bin Shieh
- School of Dentistry and Institute of Oral MedicineNational Cheng Kung UniversityTainanTaiwan
- Institute of Basic MedicineNational Cheng Kung UniversityTainanTaiwan
- Center of Applied Nanomedicine and Core Facility CenterNational Cheng Kung UniversityTainanTaiwan
- iMANI Center of the National Core Facility for BiopharmaceuticalsNational Science and Technology CouncilTaipeiTaiwan
- Department of StomatologyNational Cheng Kung University HospitalTainanTaiwan
| | - Nan‐Yao Lee
- Department of MedicineNational Cheng Kung UniversityTainanTaiwan
- Division of Infectious Diseases, Department of Internal Medicine and Center for Infection ControlNational Cheng Kung University HospitalTainanTaiwan
| | - Pei‐Jane Tsai
- Institute of Basic MedicineNational Cheng Kung UniversityTainanTaiwan
- Department of Medical Laboratory Science and BiotechnologyNational Cheng Kung UniversityTainanTaiwan
- Research Center of Infectious Disease and SignalingNational Cheng Kung UniversityTainanTaiwan
- Department of Pathology, National Cheng Kung University Hospital, College of MedicineNational Cheng Kung UniversityTainanTaiwan
| | - Chih‐Chia Huang
- Department of PhotonicsNational Cheng Kung UniversityTainanTaiwan
- Center of Applied Nanomedicine and Core Facility CenterNational Cheng Kung UniversityTainanTaiwan
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Ryu HJ, Kim KT, Lee WK, Lee JS. Unveiling the Role of Precursors in the Byproduct Formation of AgCl-Replicated Bimetallic Nanostructures and Their Stability-Dependent Photothermal Properties. ACS OMEGA 2023; 8:25506-25514. [PMID: 37483246 PMCID: PMC10357579 DOI: 10.1021/acsomega.3c03096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 06/20/2023] [Indexed: 07/25/2023]
Abstract
AgCl nanomaterials recently attracted scientific interest as useful structural building blocks for producing metallic nanomaterials owing to their facile synthesis, controllable morphology, and ease of removal under ambient conditions. However, their complex chemical reactivity has primarily been studied in association with water solubility or reducibility. This study investigates the pivotal role of precursor ligands in the photochemical synthesis of metallic cubic mesh nanostructures on the AgCl templates. The side reactions between AgCl and Au precursors with different ligands are thoroughly discussed along with their influence on the byproduct formation and the structural stability of the resulting metallic nanostructures. Importantly, we introduce for the first time the partial destruction of AgCl and the formation of undesirable byproducts caused by the presence of highly oxidizing and Cl-containing AuCl4-. In addition, a synthetic route for producing highly pure and stable metallic nanostructures using a halogen-free Au precursor or Pt-priming is proposed. Further, the photothermal properties of these replicated metallic nanostructures are presented as a new evaluation tool for analyzing their overall structural stability. Discovering the role of precursor ligands in the reaction system will prove useful as a guide for the synthesis of functional noble metal nanomaterials using silver halide templates.
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Ying Y, Tang Z, Liu Y. Material design, development, and trend for surface-enhanced Raman scattering substrates. NANOSCALE 2023. [PMID: 37335252 DOI: 10.1039/d3nr01456h] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
Surface-enhanced Raman scattering (SERS) is a powerful and non-invasive spectroscopic technique that can provide rich and specific chemical fingerprint information for various target molecules through effective SERS substrates. In view of the strong dependence of the SERS signals on the properties of the SERS substrates, design, exploration, and construction of novel SERS-active nanomaterials with low cost and excellent performance as the SERS substrates have always been the foundation and the top priority for the development and application of the SERS technology. This review specifically focuses on the extensive progress made in the SERS-active nanomaterials and their enhancement mechanism since the first discovery of SERS on the nanostructured plasmonic metal substrates. The design principles, unique functions, and influencing factors on the SERS signals of different types of SERS-active nanomaterials are highlighted, and insight into their future challenge and development trends is also suggested. It is highly expected that this review could benefit a complete understanding of the research status of the SERS-active nanomaterials and arouse the research enthusiasm for them, leading to further development and wider application of the SERS technology.
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Affiliation(s)
- Yue Ying
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China.
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhiyong Tang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China.
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yaling Liu
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China.
- University of Chinese Academy of Sciences, Beijing 100049, China
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Blackburn TJ, Tyler SM, Pemberton JE. Optical Spectroscopy of Surfaces, Interfaces, and Thin Films. Anal Chem 2022; 94:515-558. [DOI: 10.1021/acs.analchem.1c05323] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Thomas J. Blackburn
- Department of Chemistry and Biochemistry, University of Arizona, 1306 East University Boulevard, Tucson, Arizona 85721, United States
| | - Sarah M. Tyler
- Department of Chemistry and Biochemistry, University of Arizona, 1306 East University Boulevard, Tucson, Arizona 85721, United States
| | - Jeanne E. Pemberton
- Department of Chemistry and Biochemistry, University of Arizona, 1306 East University Boulevard, Tucson, Arizona 85721, United States
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Portable Au Nanoparticle-Based Colorimetric Sensor Strip for Rapid On-Site Detection of Cd2+ Ions in Potable Water. BIOCHIP JOURNAL 2021. [DOI: 10.1007/s13206-021-00029-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Ryu HJ, Lee WK, Kim YH, Lee JS. Interfacial interactions of SERS-active noble metal nanostructures with functional ligands for diagnostic analysis of protein cancer markers. Mikrochim Acta 2021; 188:164. [PMID: 33844071 DOI: 10.1007/s00604-021-04807-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 03/22/2021] [Indexed: 12/27/2022]
Abstract
Noble metal nanostructures with designed hot spots have been widely investigated as surface-enhanced Raman spectroscopy (SERS)-active substrates, particularly for selective and sensitive detection of protein cancer markers. For specific target recognition and efficient signal amplification, SERS probe design requires a choice of SERS-active nanostructures as well as their controlled functionalization with Raman dyes and target recognition entities such as antibodies. However, the chemical conjugation of antibodies and Raman dyes to SERS substrates has rarely been discussed to date, despite their substantial roles in detection schemes. The interfacial interactions of metal nanostructures with functional ligands during conjugation are known to be strongly influenced by the various chemical and physical properties of the ligands, such as size, molecular weight, surface charge, 3-dimensional structures, and hydrophilicity/hydrophobicity. In this review, we discuss recent developments in the design of SERS probes over the last 4 years, focusing on their conjugation chemistry for functionalization. A strong preference for covalent bonding is observed with Raman dyes having simpler molecular structures, whereas more complicated ones are non-covalently adsorbed. Antibodies are both covalently and non-covalently bonded to nanostructures, depending on their activity in the SERS probes. Considering that ligand conjugation is highly important for chemical stability, biocompatibility, and functionality of SERS probes, this review is expected to expand the understanding of their interfacial design, leading to SERS as one of the most promising spectroscopic analytical tools for the early detection of protein cancer markers.
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Affiliation(s)
- Han-Jung Ryu
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Won Kyu Lee
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Yoon Hyuck Kim
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Jae-Seung Lee
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.
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Hou X, Lin Q, Wei Y, Hao Q, Ni Z, Qiu T. Surface-Enhanced Raman Scattering Monitoring of Oxidation States in Defect-Engineered Two-Dimensional Transition Metal Dichalcogenides. J Phys Chem Lett 2020; 11:7981-7987. [PMID: 32886522 DOI: 10.1021/acs.jpclett.0c02318] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Recent studies have found that some transition metal dichalcogenides (TMDs) with their own defects are difficult to store in the air for a long time. Worse stability of TMDs under extreme conditions has also been reported. Therefore, monitoring the oxidation and degradation processes of TMDs can directly guide the stability prediction of TMD-based devices and monitor TMDs quality. Herein, with the case of molybdenum disulfide, UV-ozone defect engineering is used to simulate the oxidation and degradation of TMDs under severe conditions. Surface-enhanced Raman scattering based on a chemical mechanism was first introduced to the dynamic monitoring of defect evolution in the oxidation and degradation of TMDs, and succeeds in tracking the TMDs oxidation state by the quantitative method. It is expected that this technology can be extended to the quantification and tracking of oxidation and degradation of other 2D materials.
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Affiliation(s)
- Xiangyu Hou
- School of Physics, Southeast University, Nanjing, 211189, P.R. China
| | - Qian Lin
- School of Physics, Southeast University, Nanjing, 211189, P.R. China
| | - Yunjia Wei
- School of Physics, Southeast University, Nanjing, 211189, P.R. China
| | - Qi Hao
- School of Physics, Southeast University, Nanjing, 211189, P.R. China
| | - Zhenhua Ni
- School of Physics, Southeast University, Nanjing, 211189, P.R. China
| | - Teng Qiu
- School of Physics, Southeast University, Nanjing, 211189, P.R. China
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Structurally and Compositionally Tunable Absorption Properties of AgCl@AgAu Nanocatalysts for Plasmonic Photocatalytic Degradation of Environmental Pollutants. Catalysts 2020. [DOI: 10.3390/catal10040405] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Composite nanomaterials having Ag nanoparticles (NPs) that decorate nanostructured AgCl (Ag/AgCl) are promising as plasmonic photocatalysts because of the visible-light absorption of Ag NPs. However, the narrow absorption bands of Ag NPs near 400 nm cause inefficient absorption in the visible range and, consequently, unsatisfactory photocatalytic activity of Ag/AgCl nanomaterials. In this study, we introduce a new class of AgCl-based photocatalysts that are decorated with bimetallic Ag and Au NPs (AgCl@AgAu NPs) for visible-light-driven photocatalytic degradation of organic pollutants. Polyvinylpyrrolidone induces selective reduction of noble metal precursors on AgCl while leaving AgCl intact. The extended composition of the decorating NPs red-shifts the absorption band to 550–650 nm, which allows the catalysts to take advantage of more energy in the visible range for improved efficiency. Furthermore, we control the structures of the AgCl@AgAu NPs, and investigate their correlation with photocatalytic properties. The versatility, chemical stability, and practical application of the AgCl@AgAu NPs are demonstrated using various organic pollutants, recycling experiments, and natural aqueous media, respectively. Our fundamental investigation on the synthesis and applications of AgCl-based nano-photocatalysts is highly valuable for designing plasmonic photocatalysts and expanding their utilization.
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