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Gao T, Yachi T, Shi X, Sato R, Sato C, Yonamine Y, Kanie K, Misawa H, Ijiro K, Mitomo H. Ultrasensitive Surface-Enhanced Raman Scattering Platform for Protein Detection via Active Delivery to Nanogaps as a Hotspot. ACS NANO 2024; 18:21593-21606. [PMID: 39093951 PMCID: PMC11328179 DOI: 10.1021/acsnano.4c09578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
Surface-enhanced Raman scattering (SERS) is an attractive technique in molecular detection with high sensitivity and label-free characteristics. However, its use in protein detection is limited by the large volume of proteins, hindering its approach to the narrow spaces of hotspots. In this study, we fabricated a Au nanoTriangle plate Array on Gel (AuTAG) as an SERS substrate by attaching a Au nanoTriangle plate (AuNT) arrangement on a thermoresponsive hydrogel surface. The AuTAG acts as an actively tunable plasmonic device, on which the interparticle distance is altered by controlling temperature via changes in hydrogel volume. Further, we designed a Gel Filter Trapping (GFT) method as an active protein delivery strategy based on the characteristics of hydrogels, which can absorb water and separate biopolymers through their three-dimensional (3D) polymer networks. On the AuTAGs, fabricated with AuNTs modified with charged surface ligands to prevent the nonspecific adsorption of analytes to particles, the GFT method helped the delivery of proteins to hotspot areas on the AuNT arrangement. This combination of a AuTAG substrate and the GFT method enables ultrahigh sensitivity for protein detection by SERS up to a single-molecule level as well as a wide quantification concentration range of 6 orders due to their geometric advantages.
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Affiliation(s)
- Tianxu Gao
- Graduate School of Life Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Takehiro Yachi
- Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan
| | - Xu Shi
- Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan
- Creative Research Institution, Hokkaido University, Sapporo 001-0021, Japan
| | - Rina Sato
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Chikara Sato
- AIST Tsukuba central 7, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan
- Biological Science Course, Graduate School of Science and Engineering, Aoyama Gakuin University, Sagamihara, Kanagawa 252-5258, Japan
- School of Integrative and Global Majors (SIGMA), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
- Division of Immune Homeostasis, Microbiology, Department of Pathology and Microbiology, Nihon University School of Medicine, Itabashi 173-8610, Japan
| | - Yusuke Yonamine
- Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan
| | - Kiyoshi Kanie
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
- International Center for Synchrotron Radiation Innovation Smart, Tohoku University, Sendai 980-8577, Japan
| | - Hiroaki Misawa
- Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan
- Research Institute for Interdisciplinary Science, Okayama University, Okayama 770-8530, Japan
- Center for Emergent Functional Matter Science, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Kuniharu Ijiro
- Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan
| | - Hideyuki Mitomo
- Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
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2
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Bayat M, Mardani H, Roghani-Mamaqani H, Hoogenboom R. Self-indicating polymers: a pathway to intelligent materials. Chem Soc Rev 2024; 53:4045-4085. [PMID: 38449438 DOI: 10.1039/d3cs00431g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Self-indicating polymers have emerged as a promising class of smart materials that possess the unique ability to undergo detectable variations in their physical or chemical properties in response to various stimuli. This article presents an overview of the most important mechanisms through which these materials exhibit self-indication, including aggregation, phase transition, covalent and non-covalent bond cleavage, isomerization, charge transfer, and energy transfer. Aggregation is a prevalent mechanism observed in self-indicating polymers, where changes in the degree of molecular organization result in variations in optical or electrical properties. Phase transition-induced self-indication relies on the transformation between different phases, such as liquid-to-solid or crystalline-to-amorphous transitions, leading to observable changes in color or conductivity. Covalent bond cleavage-based self-indicating polymers undergo controlled degradation or fragmentation upon exposure to specific triggers, resulting in noticeable variations in their structural or mechanical properties. Isomerization is another crucial mechanism exploited in self-indicating polymers, where the reversible transformation between the different isomeric forms induces detectable changes in fluorescence or absorption spectra. Charge transfer-based self-indicating polymers rely on the modulation of electron or hole transfer within the polymer backbone, manifesting as changes in electrical conductivity or redox properties. Energy transfer is an essential mechanism utilized by certain self-indicating polymers, where energy transfer between chromophores or fluorophores leads to variations in the emission characteristics. Furthermore, this review article highlights the diverse range of applications for self-indicating polymers. These materials find particular use in sensing and monitoring applications, where their responsive nature enables them to act as sensors for specific analytes, environmental parameters, or mechanical stress. Self-indicating polymers have also been used in the development of smart materials, including stimuli-responsive coatings, drug delivery systems, food sensors, wearable devices, and molecular switches. The unique combination of tunable properties and responsiveness makes self-indicating polymers highly promising for future advancements in the fields of biotechnology, materials science, and electronics.
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Affiliation(s)
- Mobina Bayat
- Faculty of Polymer Engineering, Sahand University of Technology, P.O. Box: 51335-1996, Tabriz, Iran.
| | - Hanieh Mardani
- Faculty of Polymer Engineering, Sahand University of Technology, P.O. Box: 51335-1996, Tabriz, Iran.
| | - Hossein Roghani-Mamaqani
- Faculty of Polymer Engineering, Sahand University of Technology, P.O. Box: 51335-1996, Tabriz, Iran.
- Institute of Polymeric Materials, Sahand University of Technology, P.O. Box: 51335-1996, Tabriz, Iran
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University, Krijgslaan 281, S4-bis, B-9000 Ghent, Belgium.
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3
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Wang H, Chen Y, Yang Y, Xu P, Zhang B, Lu Y, He W, Liu Y, Zhang JH, Xiao X, You R. Preparation of cellulose-based flexible SERS and its application for rapid and ultra-sensitive detection of thiram on fruits and vegetables. Int J Biol Macromol 2024; 262:129941. [PMID: 38342254 DOI: 10.1016/j.ijbiomac.2024.129941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 01/18/2024] [Accepted: 02/01/2024] [Indexed: 02/13/2024]
Abstract
In response to the prevalent issue of thiram as a common pesticide residue on the surface of fruits and vegetables, our research team employed an acidic hydrated metal salt low co-fusion solvent to dissolve cellulose lysis slurry. Subsequently, a regenerated cellulose membrane (RCM) was successfully prepared via sol-gel method. Uniformly sized Ag nanoparticles (NPs) were deposited on RCM utilizing the continuous ion layer adsorption and reaction (SILAR) technique. The resulting Ag NPs/RCM flexible surface-enhanced Raman spectroscopy (SERS) substrates exhibited a minimum detection limit of 5 × 10-9 M for Rhodamine 6G (R6G), demonstrating good uniformity (RSD = 4.86 %) and reproducibility (RSD = 3.07 %). Moreover, the substrate displayed a remarkable sensitivity of 10-10 M toward thiram standard solution. Given its inherent flexibility, the substrate proves advantageous for the detection of three-dimensional environments such as fruit and vegetable surfaces, and its practicality has been confirmed in the detection of thiram residue on apples, tomatoes, pears, and other fruits and vegetables.
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Affiliation(s)
- Haonan Wang
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, Fujian 350007, China; School of Resources and Chemical Engineering, Sanming University, Sanming, Fujian 365004, China
| | - Yujia Chen
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Yixuan Yang
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Peipei Xu
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Bohan Zhang
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Yudong Lu
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Wenjin He
- College of Life Science, Southern Institute of Oceanography, Fujian Normal University, Fuzhou, China.
| | - Yunzhen Liu
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Jian-Han Zhang
- School of Resources and Chemical Engineering, Sanming University, Sanming, Fujian 365004, China.
| | - Xiufeng Xiao
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Ruiyun You
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, Fujian 350007, China.
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4
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Kim DH, Lee HJ, Park D, Yim JH, Choi HK. Fabrication of a nanoscale 2D PEDOT pattern via the combination of colloidal lithography and vapor phase polymerization for application in transparent, highly sensitive bending sensors. NANOSCALE 2023; 15:4620-4627. [PMID: 36776102 DOI: 10.1039/d2nr07104e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Recent advances in flexible, stretchable, and wearable electronics have necessitated the development of more diverse and complex device structures; high-resolution patterning strategies for conducting polymers are therefore urgently required to enable the fabrication of these devices. In this study, we report a nanoscale patterning strategy for conductive polymer films that utilizes a combination of vapor phase polymerization (VPP) and colloidal lithography. Here, hemispherical non-close-packed colloidal crystals are used as an effective lithographic mask for patterning oxidants on a substrate; subsequently, two-dimensional honeycomb-structured porous poly(3,4-ethylenedioxythiophene) (PEDOT) films are fabricated via VPP using the prepatterned oxidant. The resulting films closely resemble the morphology of the preceding oxidant structure; furthermore, the film porosity can be altered by adjusting the polymerization time. These patterned PEDOT films exhibit high transparency owing to the presence of voids, and high electrical sensitivity to bending stresses, which were concentrated in the narrow-patterned area. As the described fabrication methods are facile and reliable, this approach therefore provides an effective route for the fabrication of various conducting polymer frameworks in the micro- to nanoscale range.
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Affiliation(s)
- Dong Hwan Kim
- Division of Advanced Materials Engineering, Kongju National University, 1223-24Cheonan-daero, Seobuk-gu, Cheonan-si, Chungnam, 31080, South Korea.
| | - Ho Joon Lee
- Division of Advanced Materials Engineering, Kongju National University, 1223-24Cheonan-daero, Seobuk-gu, Cheonan-si, Chungnam, 31080, South Korea.
| | - Daedong Park
- Division of Advanced Materials Engineering, Kongju National University, 1223-24Cheonan-daero, Seobuk-gu, Cheonan-si, Chungnam, 31080, South Korea.
| | - Jin-Heong Yim
- Division of Advanced Materials Engineering, Kongju National University, 1223-24Cheonan-daero, Seobuk-gu, Cheonan-si, Chungnam, 31080, South Korea.
| | - Hong Kyoon Choi
- Division of Advanced Materials Engineering, Kongju National University, 1223-24Cheonan-daero, Seobuk-gu, Cheonan-si, Chungnam, 31080, South Korea.
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5
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Pagnotto D, Muravitskaya A, Benoit DM, Bouillard JSG, Adawi AM. Stark Effect Control
of the Scattering Properties
of Plasmonic Nanogaps Containing an Organic Semiconductor. ACS APPLIED OPTICAL MATERIALS 2022; 1:500-506. [PMCID: PMC9903362 DOI: 10.1021/acsaom.2c00135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 12/05/2022] [Indexed: 11/17/2023]
Abstract
The development of actively tunable plasmonic nanostructures enables real-time reconfigurable and on-demand enhancement of optical signals. This is an essential requirement for a wide range of applications such as sensing and nanophotonic devices, for which electrically driven tunability is required. By modifying the transition energies of a material via the application of an electric field, the Stark effect offers a reliable and practical approach to achieve such tunability. In this work, we report on the use of the Stark effect to control the scattering response of a plasmonic nanogap formed between a silver nanoparticle and an extended silver film separated by a thin layer of the organic semiconductor PQT-12. The plasmonic response of such nanoscattering sources follows the quadratic Stark shift. In addition, our approach allows one to experimentally determine the polarizability of the semiconductor material embedded in the nanogap region, offering a new approach to probe the excitonic properties of extremely thin semiconducting materials such as 2D materials under applied external electric field with nanoscale resolution.
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Affiliation(s)
- Donatello Pagnotto
- Department
of Physics and Mathematics, University of
Hull, Cottingham Road, HullHU6 7RX, United Kingdom
| | - Alina Muravitskaya
- Department
of Physics and Mathematics, University of
Hull, Cottingham Road, HullHU6 7RX, United Kingdom
| | - David M. Benoit
- Department
of Physics and Mathematics, University of
Hull, Cottingham Road, HullHU6 7RX, United Kingdom
| | - Jean-Sebastien G. Bouillard
- Department
of Physics and Mathematics, University of
Hull, Cottingham Road, HullHU6 7RX, United Kingdom
- G.
W. Gray Centre for Advanced Materials, University
of Hull, Cottingham Road, HullHU6 7RX, United Kingdom
| | - Ali M. Adawi
- Department
of Physics and Mathematics, University of
Hull, Cottingham Road, HullHU6 7RX, United Kingdom
- G.
W. Gray Centre for Advanced Materials, University
of Hull, Cottingham Road, HullHU6 7RX, United Kingdom
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6
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Nanoparticle–Hydrogel Based Sensors: Synthesis and Applications. Catalysts 2022. [DOI: 10.3390/catal12101096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Hydrogels are hydrophilic three-dimensional (3D) porous polymer networks that can easily stabilize various nanoparticles. Loading noble metal nanoparticles into a 3D network of hydrogels can enhance the synergy of the components. It can also be modified to prepare intelligent materials that can recognize external stimuli. The combination of noble metal nanoparticles and hydrogels to produce modified or new composite materials has attracted considerable attention as to the use of these materials in sensors. However, there is limited review literature on nanoparticle–hydrogel-based sensors. This paper presents the detailed strategies of synthesis and design of the composites, and the latest applications of nanoparticle–hydrogel materials in the sensing field. Finally, the current challenges and future development directions of nanoparticle–hydrogel-based sensors are proposed.
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7
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Zhu K, Yang K, Zhang Y, Yang Z, Qian Z, Li N, Li L, Jiang G, Wang T, Zong S, Wu L, Wang Z, Cui Y. Wearable SERS Sensor Based on Omnidirectional Plasmonic Nanovoids Array with Ultra-High Sensitivity and Stability. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2201508. [PMID: 35843883 DOI: 10.1002/smll.202201508] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 05/19/2022] [Indexed: 05/24/2023]
Abstract
Surface-enhanced Raman spectroscopy (SERS) is a promising technology for wearable sensors due to its fingerprint spectrum and high detection sensitivity. However, since SERS-activity is sensitive to both the distribution of "hotspots" and excitation angle, it is profoundly challenging to develop a wearable SERS sensor with high stability under various deformations during movements. Herein, inspired by omnidirectional light-harvesting of the compound eye of Xenos Peckii, a wearable SERS sensor is developed using omnidirectional plasmonic nanovoids array (OPNA), which is prepared by assembling a monolayer of metal nanoparticles into the artificial plasmonic compound-eye (APC). Specifically, APC is an interconnected frame containing omnidirectional "pockets" and acts as an "armour", not only rendering a broadband and omnidirectional enhancement of "hotspots" in the delicate nanoparticles array, but also maintaining an integrity of the "hotspots" against external mechanical deformations. Furthermore, an asymmetry super-hydrophilic pattern is fabricated on the surface of OPNA, endowing the hydrophobic OPNA with the ability to spontaneously extract and concentrate the analytes from sweat. Such an armored SERS sensor can enable the wearable and in situ analysis with high sensitivity and stability, exhibiting great potential in point-of-care analysis.
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Affiliation(s)
- Kai Zhu
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China
| | - Kuo Yang
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China
| | - Yizhi Zhang
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China
| | - Zhaoyan Yang
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China
| | - Ziting Qian
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China
| | - Na Li
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China
| | - Lang Li
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China
| | - Guohua Jiang
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China
| | - Tingyu Wang
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China
| | - Shenfei Zong
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China
| | - Lei Wu
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China
| | - Zhuyuan Wang
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China
| | - Yiping Cui
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China
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8
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Graphene Oxide-Coated Metal–Insulator–Metal SERS Substrates for Trace Melamine Detection. NANOMATERIALS 2022; 12:nano12071202. [PMID: 35407320 PMCID: PMC9002873 DOI: 10.3390/nano12071202] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/27/2022] [Accepted: 03/31/2022] [Indexed: 02/01/2023]
Abstract
Surface-enhanced Raman spectroscopy (SERS) has long been an ultrasensitive technique for trace molecule detection. However, the development of a sensitive, stable, and reproducible SERS substrate is still a challenge for practical applications. Here, we demonstrate a cost-effective, centimeter-sized, and highly reproducible SERS substrate using the nanosphere lithography technique. It consists of a hexagonally packed Ag metasurface on a SiO2/Au/Si substrate. A seconds-lasting etching process of a self-assembled nanosphere mask manipulates the geometry of the deposited Ag metasurface on the SiO2/Au/Si substrate, which attains the wavelength matching between the optical absorbance of the Ag/SiO2/Au/Si substrate and the excitation laser wavelength as well as the enhancement of Raman signals. By spin-coating a thin layer of graphene oxide on the substrate, a SERS performance with 1.1 × 105 analytical enhancement factor and a limit of detection of 10−9 M for melamine is achieved. Experimental results reveal that our proposed strategy could provide a promising platform for SERS-based rapid trace detection in food safety control and environmental monitoring.
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9
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Wei H, Peng Z, Yang C, Tian Y, Sun L, Wang G, Liu M. Three-Dimensional Au/Ag Nanoparticle/Crossed Carbon Nanotube SERS Substrate for the Detection of Mixed Toxic Molecules. NANOMATERIALS 2021; 11:nano11082026. [PMID: 34443857 PMCID: PMC8401542 DOI: 10.3390/nano11082026] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 08/05/2021] [Accepted: 08/06/2021] [Indexed: 11/16/2022]
Abstract
Research on engineering "hotspots" in the field of surface-enhanced Raman scattering (SERS) is at the forefront of contributing to the best sensing indicators. Currently, there is still an urgent need to design a high-strength and large-scale electric field distribution method in order to obtain an ideal SERS sensor. Here, we designed a three-dimensional (3D) Au/Ag nanoparticle (NP)/crossed carbon nanotube film SERS substrate. The proposed structure formed by the simple preparation process can perfectly coordinate the interaction between the SERS substrates, lasers, and molecules. The denser "hotspots" can be induced and then distributed in holes enclosed by Au/AgNPs and the gaps between them. This process was verified by numerical simulations. The experimental results show that the proposed SERS substrate possesses an excellent sensitivity of 10-12 M (rhodamine 6G (R6G)), an enhancement factor of 1.60 × 109, and a good signal reproducibility (the relative standard deviation is ~6.03%). We further use a Au/AgNP/crossed CNT substrate to detect complex solutions composed of toxic molecules, which shows that our proposed SERS substrate has a wide range of application potentials, especially in food safety.
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Affiliation(s)
- Haonan Wei
- School of Physics and Electronics, Shandong Normal University, Jinan 250358, China; (H.W.); (C.Y.); (Y.T.)
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China;
| | - Zhisheng Peng
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China;
| | - Cheng Yang
- School of Physics and Electronics, Shandong Normal University, Jinan 250358, China; (H.W.); (C.Y.); (Y.T.)
| | - Yuan Tian
- School of Physics and Electronics, Shandong Normal University, Jinan 250358, China; (H.W.); (C.Y.); (Y.T.)
| | - Lianfeng Sun
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China;
- Correspondence: (L.S.); (G.W.); (M.L.)
| | - Gongtang Wang
- School of Physics and Electronics, Shandong Normal University, Jinan 250358, China; (H.W.); (C.Y.); (Y.T.)
- Correspondence: (L.S.); (G.W.); (M.L.)
| | - Mei Liu
- School of Physics and Electronics, Shandong Normal University, Jinan 250358, China; (H.W.); (C.Y.); (Y.T.)
- Correspondence: (L.S.); (G.W.); (M.L.)
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10
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Wei Q, Zhang L, Song C, Yuan H, Li X. Quantitative detection of dithiocarbamate pesticides by surface-enhanced Raman spectroscopy combined with an exhaustive peak-seeking method. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:1479-1488. [PMID: 33687382 DOI: 10.1039/d0ay01953d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Surface-enhanced Raman spectroscopy (SERS) based on nanosilver colloid substrates has great potential for rapid detection of pesticide residues because of its advantages of sensitivity, rapidity, simplicity, low cost, etc. However, its poor repeatability and narrow linear quantitative range limit its practical application. In this paper, a silver colloid SERS analysis method combined with an exhaustive peak-seeking method was introduced for quantitative determination of thiram and ziram. This method can establish a linear quantitative relationship in a wide range by use of an own characteristic peak of analysis as an internal standard (IS) which is found via judging the linear correlation between the intensity ratios of two SERS peaks of analytes and the concentrations. Combined with improving the preparation method of silver colloids, adding suitable activators and optimizing the detection process, a liquid detection system with good repeatability and a wide linear quantitation range was obtained. The relative standard deviation (RSD) of the strongest SERS peak is no more than 8.98%, which is better than the general case of the silver colloid SERS substrate. The ratio of I1384/I1148 has a good linear relationship with the concentration of thiram solution, and the 1148 cm-1 characteristic peak was utilized as the IS to establish the standard curve equation for the determination of thiram concentration. The equation is I1384/I1148 = -1.7930 × lg[cthiram (ppm)] + 6.0078 with a linear range of 10-2 to 102 ppm (4.16 × 10-8 to 4.16 × 10-4 mol L-1) and a limit of detection (LOD) of 10-2 ppm. The peak of IS for the determination of ziram concentration is at 938 cm-1, and the equation is I1384/I938 = 4.5531 × lg[cziram (ppm)] + 6.4792 with a linear range of 10-1 to 102 ppm (3.27 × 10-7 to 3.27 × 10-4 mol L-1) and a LOD of 10-4 ppm. Thiram or ziram in apple juice was successfully detected by using this liquid detection system. This analysis system effectively solves the problem of poor repeatability and a narrow linear quantification range in SERS analysis based on silver colloid substrates, and the linear quantification range meets the requirements of the national standard (GB-2763-2019).
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Affiliation(s)
- Qiaoling Wei
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
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11
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Kim D, Gwon G, Lee G, Jeon Y, Kim UJ, Alothman ZA, You J. Surface-enhanced Raman scattering-active AuNR array cellulose films for multi-hazard detection. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123505. [PMID: 32711381 DOI: 10.1016/j.jhazmat.2020.123505] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 07/09/2020] [Accepted: 07/13/2020] [Indexed: 06/11/2023]
Abstract
In this study, we report a surface-enhanced Raman scattering (SERS)-active array film, which is based on regenerated cellulose hydrogels and gold nanorods (AuNRs), by combining a silicon rubber mask with a vacuum filtration method. This strategy enables the direct AuNR array formation on hydrogel surface with a precisely controlled number density. Moreover, the control of interparticle nanogap has been realized by the spatial deformation of hydrogels. A decrease in gaps between AuNRs deposited on hydrogels can result in SERS enhancement because 3D porous hydrogel structures turned into 2D closely packed hydrogel films during drying. In our experiments, SERS sensor arrays show excellent SERS activity to detect rhodamine 6 G and thiram down to 10 pM and 100 fM with competitive enhancement factors of 3.9 × 108 and 9.5 × 109, respectively. Importantly, the resultant SERS-active arrays with nine sensor units can efficiently detect nine different analytes on a single substrates at a time. Moreover, we demonstrate that physical bending has little effect on the SERS activity of flexible AuNR array hydrogel films, which indicates the high reproducibility of SERS measurement. This SERS array film has great potential to simultaneously detect multiple hazards for the practical application of SERS analysis.
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Affiliation(s)
- Dabum Kim
- Department of Plant & Environmental New Resources, Graduate School of Biotechnology, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, 446-701, South Korea
| | - Goomin Gwon
- Department of Plant & Environmental New Resources, Graduate School of Biotechnology, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, 446-701, South Korea
| | - Gangyoon Lee
- Department of Plant & Environmental New Resources, Graduate School of Biotechnology, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, 446-701, South Korea
| | - Youngho Jeon
- Department of Plant & Environmental New Resources, Graduate School of Biotechnology, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, 446-701, South Korea
| | - Ung-Jin Kim
- Department of Plant & Environmental New Resources, Graduate School of Biotechnology, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, 446-701, South Korea
| | - Zeid A Alothman
- Chemistry Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Jungmok You
- Department of Plant & Environmental New Resources, Graduate School of Biotechnology, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, 446-701, South Korea.
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Song C, Jiang X, Yang Y, Zhang J, Larson S, Zhao Y, Wang L. High-Sensitive Assay of Nucleic Acid Using Tetrahedral DNA Probes and DNA Concatamers with a Surface-Enhanced Raman Scattering/Surface Plasmon Resonance Dual-Mode Biosensor Based on a Silver Nanorod-Covered Silver Nanohole Array. ACS APPLIED MATERIALS & INTERFACES 2020; 12:31242-31254. [PMID: 32608960 DOI: 10.1021/acsami.0c08453] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A novel surface-enhanced Raman scattering/surface plasmon resonance (SERS/SPR) dual-mode biosensor prepared on a silver nanorod-covered silver nanohole (Ag NR-NH) array by surface modification of tetrahedral DNA probes is proposed for highly sensitive detecting nucleic acids by a special signal amplification strategy of DNA supersandwich. The Ag NR-NH with a large area and uniformly arrayed nanostructure possesses excellent anisotropic extraordinary optical transmission and strong localized surface plasmon resonance, which lead to sensitive SPR response to the change of a local refractive index and strong localized electric fields for excellent SERS activity. To obtain high sensitivity and specificity, smart tetrahedral DNA probes are immobilized onto the Ag NR-NH array and the DNA supersandwich sensing strategy, including the signal amplification of DNA concatamers, is used. About 10 times signal enhancement for SPR and 4 times for SERS are achieved by this sensing strategy. In the detection of the target DNA in the human serum, the two sensing modes have complementary performances, i.e., the limit of detection for the SPR array is high (0.51 pM), while for SERS, it is low (0.77 fM), but the specificity for SPR is much higher than that of SERS. This improves the robustness of the DNA sensors, and subsequent recovery tests also confirm good reliability of the biosensor. The proposed SERS/SPR dual-mode biosensor has a great potential for high performance and reliable detection of trace disease-related nucleic acid biomarkers in the serum and is a powerful sensing platform for early-stage disease diagnosis.
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Affiliation(s)
- Chunyuan Song
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, Nanjing 210023, China
| | - Xinyu Jiang
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, Nanjing 210023, China
| | - Yanjun Yang
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, Nanjing 210023, China
- Department of Physics and Astronomy, University of Georgia, Athens Georgia 30602, United States
| | - Jingjing Zhang
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, Nanjing 210023, China
| | - Steven Larson
- Department of Physics and Astronomy, University of Georgia, Athens Georgia 30602, United States
| | - Yiping Zhao
- Department of Physics and Astronomy, University of Georgia, Athens Georgia 30602, United States
| | - Lianhui Wang
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, Nanjing 210023, China
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