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Xing L, Sun Y, Chu R, Li W, Chen X, Hou S, Xu L, Li L, Chen G, Xing T. Preparation of Flower-like Nanosilver Based on Bioderived Caffeic Acid for Raman Enhancement and Dye Degradation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:8665-8677. [PMID: 38598258 DOI: 10.1021/acs.langmuir.4c00478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
In this study, a simple, green, and low-cost room temperature synthesis of broccoli-like silver nanoflowers (AgNF) with a particle size of about 300-500 nm was developed using plant-derived caffeic acid as a reducing agent and polyvinylpyrrolidone as a dispersant under ultrasound assistance. The flower clusters covered by small nanocrystals of 20-50 nm significantly enhance the electromagnetic field signals. AgNF was deposited on the surface of silicon wafers as a surface-enhanced Raman spectroscopy sensor for the detection of probe molecules such as rhodamine 6G (R6G) and malachite green with high sensitivity, homogeneity, and reproducibility. AgNF was deposited on cotton fabrics in the form of composites to catalyze the degradation of dye pollutants such as R6G, MG, and methyl orange in the presence of sodium borohydride. 0.1 g of AgNF/cotton fabric could assist 15 mmol/L NaBH4 to achieve over 90% degradation of various dyes as well as a high concentration of dyes in 12 min with good reusability and recyclability. The AgNF synthesized in this work can not only monitor the type and amounts of pollutants (dyes) in wastewater but also catalyze the rapid degradation of dyes, which is expected to be valuable for industrial applications.
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Affiliation(s)
- Lili Xing
- College of Textile and Clothing Engineering, Jiangsu Engineering Research Center of Textile Dyeing and Printing for Energy Conservation, Discharge Reduction and Cleaner Production (ERC), Soochow University, Suzhou 215123, China
| | - Yurong Sun
- College of Textile and Clothing Engineering, Jiangsu Engineering Research Center of Textile Dyeing and Printing for Energy Conservation, Discharge Reduction and Cleaner Production (ERC), Soochow University, Suzhou 215123, China
| | - Runshan Chu
- College of Textile and Clothing Engineering, Jiangsu Engineering Research Center of Textile Dyeing and Printing for Energy Conservation, Discharge Reduction and Cleaner Production (ERC), Soochow University, Suzhou 215123, China
| | - Wenji Li
- College of Textile and Clothing Engineering, Jiangsu Engineering Research Center of Textile Dyeing and Printing for Energy Conservation, Discharge Reduction and Cleaner Production (ERC), Soochow University, Suzhou 215123, China
| | - Xinpeng Chen
- College of Textile and Clothing Engineering, Jiangsu Engineering Research Center of Textile Dyeing and Printing for Energy Conservation, Discharge Reduction and Cleaner Production (ERC), Soochow University, Suzhou 215123, China
| | - Shuaijie Hou
- College of Textile and Clothing Engineering, Jiangsu Engineering Research Center of Textile Dyeing and Printing for Energy Conservation, Discharge Reduction and Cleaner Production (ERC), Soochow University, Suzhou 215123, China
| | - Lei Xu
- College of Textile Science and Engineering, Zhejiang SCI-TECH University, Hangzhou 310018, China
- School of Textile and Clothing, Suzhou Institute of Trade and Commerce, Suzhou 215009, China
| | - Ling Li
- College of Textile and Clothing Engineering, Jiangsu Engineering Research Center of Textile Dyeing and Printing for Energy Conservation, Discharge Reduction and Cleaner Production (ERC), Soochow University, Suzhou 215123, China
| | - Guoqiang Chen
- College of Textile and Clothing Engineering, Jiangsu Engineering Research Center of Textile Dyeing and Printing for Energy Conservation, Discharge Reduction and Cleaner Production (ERC), Soochow University, Suzhou 215123, China
| | - Tieling Xing
- College of Textile and Clothing Engineering, Jiangsu Engineering Research Center of Textile Dyeing and Printing for Energy Conservation, Discharge Reduction and Cleaner Production (ERC), Soochow University, Suzhou 215123, China
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Bi X, Lin L, Chen Z, Ye J. Artificial Intelligence for Surface-Enhanced Raman Spectroscopy. SMALL METHODS 2024; 8:e2301243. [PMID: 37888799 DOI: 10.1002/smtd.202301243] [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] [Received: 09/15/2023] [Revised: 10/11/2023] [Indexed: 10/28/2023]
Abstract
Surface-enhanced Raman spectroscopy (SERS), well acknowledged as a fingerprinting and sensitive analytical technique, has exerted high applicational value in a broad range of fields including biomedicine, environmental protection, food safety among the others. In the endless pursuit of ever-sensitive, robust, and comprehensive sensing and imaging, advancements keep emerging in the whole pipeline of SERS, from the design of SERS substrates and reporter molecules, synthetic route planning, instrument refinement, to data preprocessing and analysis methods. Artificial intelligence (AI), which is created to imitate and eventually exceed human behaviors, has exhibited its power in learning high-level representations and recognizing complicated patterns with exceptional automaticity. Therefore, facing up with the intertwining influential factors and explosive data size, AI has been increasingly leveraged in all the above-mentioned aspects in SERS, presenting elite efficiency in accelerating systematic optimization and deepening understanding about the fundamental physics and spectral data, which far transcends human labors and conventional computations. In this review, the recent progresses in SERS are summarized through the integration of AI, and new insights of the challenges and perspectives are provided in aim to better gear SERS toward the fast track.
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Affiliation(s)
- Xinyuan Bi
- State Key Laboratory of Systems Medicine for Cancer, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, P. R. China
| | - Li Lin
- State Key Laboratory of Systems Medicine for Cancer, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, P. R. China
| | - Zhou Chen
- State Key Laboratory of Systems Medicine for Cancer, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, P. R. China
| | - Jian Ye
- State Key Laboratory of Systems Medicine for Cancer, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, P. R. China
- Institute of Medical Robotics, Shanghai Jiao Tong University, Shanghai, 200127, P. R. China
- Shanghai Key Laboratory of Gynecologic Oncology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, P. R. China
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Kichijo R, Miyajima N, Ogawa D, Sugimori H, Wang KH, Imura Y, Kawai T. Water-phase synthesis of Au and Au-Ag nanowires and their SERS activity. RSC Adv 2022; 12:28937-28943. [PMID: 36320732 PMCID: PMC9551676 DOI: 10.1039/d2ra05496e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 10/06/2022] [Indexed: 11/06/2022] Open
Abstract
Metal nanowires (NWs) with a diameter of a few nanometers have attracted considerable attention as a promising one-dimensional nanomaterial due to their inherent flexibility and conductive properties and their weak plasmon absorption in the visible region. In a previous paper, we reported the synthesis of ultrathin 1.8 nm-diameter Au NWs using toluene-solubilized aqueous solutions of a long-chain amidoamine derivative (C18AA). This study investigates the effect of different organic solvents solubilized in C18AA aqueous solutions on the morphology of the Au products and demonstrates that solubilizing methylcyclohexane yields thick 2.7 nm-diameter Au NWs and 3.3 nm-diameter Au-Ag alloy NWs. Further, the surface-enhanced Raman scattering sensitivity of ultrathin Au NWs, thick Au NWs, and thick Au-Ag alloy NWs were assessed using 4-mercaptopyridine and found that their enhancement factors are 104-105 and the order is Au-Ag NWs > thick Au NWs > ultrathin Au NWs.
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Affiliation(s)
- Ryota Kichijo
- Faculty of Engineering, Tokyo University of Science6-3-1 Niijuku, Katsushika-ku125-8585TokyoJapan
| | - Naoya Miyajima
- Faculty of Engineering, Tokyo University of Science6-3-1 Niijuku, Katsushika-ku125-8585TokyoJapan
| | - Daisuke Ogawa
- Tokyo Metropolitan Industrial Technology Research Institute (TIRI)2-4-10 Aomi, Koto-ku135-0064TokyoJapan
| | - Hirokazu Sugimori
- Tokyo Metropolitan Industrial Technology Research Institute (TIRI)2-4-10 Aomi, Koto-ku135-0064TokyoJapan
| | - Ke-Hsuan Wang
- Faculty of Engineering, Tokyo University of Science6-3-1 Niijuku, Katsushika-ku125-8585TokyoJapan
| | - Yoshiro Imura
- Faculty of Engineering, Tokyo University of Science6-3-1 Niijuku, Katsushika-ku125-8585TokyoJapan
| | - Takeshi Kawai
- Faculty of Engineering, Tokyo University of Science6-3-1 Niijuku, Katsushika-ku125-8585TokyoJapan
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Ag Nanoflowers and Nanodendrites Synthesized by a Facile Method and Their Antibacterial Activity. J CLUST SCI 2022. [DOI: 10.1007/s10876-022-02245-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ibrahim N, Jamaluddin ND, Tan LL, Mohd Yusof NY. A Review on the Development of Gold and Silver Nanoparticles-Based Biosensor as a Detection Strategy of Emerging and Pathogenic RNA Virus. SENSORS (BASEL, SWITZERLAND) 2021; 21:5114. [PMID: 34372350 PMCID: PMC8346961 DOI: 10.3390/s21155114] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 07/25/2021] [Accepted: 07/26/2021] [Indexed: 12/19/2022]
Abstract
The emergence of highly pathogenic and deadly human coronaviruses, namely SARS-CoV and MERS-CoV within the past two decades and currently SARS-CoV-2, have resulted in millions of human death across the world. In addition, other human viral diseases, such as mosquito borne-viral diseases and blood-borne viruses, also contribute to a higher risk of death in severe cases. To date, there is no specific drug or medicine available to cure these human viral diseases. Therefore, the early and rapid detection without compromising the test accuracy is required in order to provide a suitable treatment for the containment of the diseases. Recently, nanomaterials-based biosensors have attracted enormous interest due to their biological activities and unique sensing properties, which enable the detection of analytes such as nucleic acid (DNA or RNA), aptamers, and proteins in clinical samples. In addition, the advances of nanotechnologies also enable the development of miniaturized detection systems for point-of-care (POC) biosensors, which could be a new strategy for detecting human viral diseases. The detection of virus-specific genes by using single-stranded DNA (ssDNA) probes has become a particular interest due to their higher sensitivity and specificity compared to immunological methods based on antibody or antigen for early diagnosis of viral infection. Hence, this review has been developed to provide an overview of the current development of nanoparticles-based biosensors that target pathogenic RNA viruses, toward a robust and effective detection strategy of the existing or newly emerging human viral diseases such as SARS-CoV-2. This review emphasizes the nanoparticles-based biosensors developed using noble metals such as gold (Au) and silver (Ag) by virtue of their powerful characteristics as a signal amplifier or enhancer in the detection of nucleic acid. In addition, this review provides a broad knowledge with respect to several analytical methods involved in the development of nanoparticles-based biosensors for the detection of viral nucleic acid using both optical and electrochemical techniques.
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Affiliation(s)
- Nadiah Ibrahim
- Southeast Asia Disaster Prevention Research Initiative (SEADPRI), Institute for Environment and Development (LESTARI), Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia; (N.I.); (N.D.J.)
| | - Nur Diyana Jamaluddin
- Southeast Asia Disaster Prevention Research Initiative (SEADPRI), Institute for Environment and Development (LESTARI), Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia; (N.I.); (N.D.J.)
| | - Ling Ling Tan
- Southeast Asia Disaster Prevention Research Initiative (SEADPRI), Institute for Environment and Development (LESTARI), Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia; (N.I.); (N.D.J.)
| | - Nurul Yuziana Mohd Yusof
- Department of Earth Sciences and Environment, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia;
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Riswana Barveen N, Wang TJ, Chang YH. In-situ deposition of silver nanoparticles on silver nanoflowers for ultrasensitive and simultaneous SERS detection of organic pollutants. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105520] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Zalaffi MS, Litti L, Canton P, Meneghetti M, Moretto LM, Ugo P. Preparation and characterization of Ag-nanostars@Au-nanowires hierarchical nanostructures for highly sensitive surface enhanced Raman spectroscopy. NANO EXPRESS 2020. [DOI: 10.1088/2632-959x/aba104] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Abstract
In this work we study the surface enhanced Raman scattering (SERS) produced by hierarchical nanostructures obtained by coupling different anisotropic nanomaterial of two SERS active metals, namely Ag nanostars (AgNSs) and Au nanowires (AuNWs). Ag nanostars (AgNSs) are prepared, by a two-step one-pot synthesis by reduction of AgNO3 with hydroxylamine, trisodium citrate and NaOH. AuNWs are obtained by electroless templated synthesis in track-etched polycarbonate membranes with following etching of the template. The two precursors are bound together by bridging with the bifunctional cysteamine molecule, obtaining AgNS@AuNW hierarchical structures. Benzenethiol (BT) is adsorbed on the nanostructured material and used as SERS probe to study the amplification of Raman signals. Experimental results indicate significantly larger Raman enhancement when BT is adsorbed onto the AgNS@AuNW in comparison to AuNWs alone or decorated with quasi-spherical silver nanoparticles obtaining AgNP@AuNW. Digital simulations performed by the boundary element method agree with the experimental findings, showing higher number of hot spots and significantly higher SERS enhancements for AgNS@AuNW versus AuNWs or AgNSs or AgNP@AuNW.
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Roy S, Sharbirin AS, Lee Y, Kim WB, Kim TS, Cho K, Kang K, Jung HS, Kim J. Measurement of Quantum Yields of Monolayer TMDs Using Dye-Dispersed PMMA Thin Films. NANOMATERIALS 2020; 10:nano10061032. [PMID: 32481624 PMCID: PMC7353022 DOI: 10.3390/nano10061032] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 05/19/2020] [Accepted: 05/25/2020] [Indexed: 11/29/2022]
Abstract
In general, the quantum yields (QYs) of monolayer transition metal dichalcogenides (1L-TMDs) are low, typically less than 1% in their pristine state, significantly limiting their photonic applications. Many methods have been reported to increase the QYs of 1L-TMDs; however, the technical difficulties involved in the reliable estimation of these QYs have prevented the general assessment of these methods. Herein, we demonstrate the estimation of the QYs of 1L-TMDs using a poly methyl methacrylate (PMMA) thin film embedded with rhodamine 6G (R6G) as a reference specimen for measuring the QYs of 1L-TMDs. The PMMA/R6G composite films with thicknesses of 80 and 300 nm demonstrated spatially homogeneous emissions with the incorporation of well-dispersed R6G molecules, and may, therefore, be used as ideal reference specimens for the QY measurement of 1L-TMDs. Using our reference specimens, for which the QY ranged from 5.4% to 22.2% depending on the film thickness and R6G concentrations, we measured the QYs of the exfoliated or chemical vapor deposition (CVD)-grown 1L-WS2, -MoSe2, -MoS2, and -WSe2 TMDs. The convenient procedure proposed in this study for preparing the thin reference films and the simple protocol for the QY estimation of 1L-TMDs may enable accurate comparisons of the absolute QYs between the 1L-TMD samples, thereby enabling the development of a method to improve the QY of 1L-TMDs.
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Affiliation(s)
- Shrawan Roy
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Korea; (S.R.); (A.S.S.); (Y.L.)
| | - Anir S. Sharbirin
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Korea; (S.R.); (A.S.S.); (Y.L.)
| | - Yongjun Lee
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Korea; (S.R.); (A.S.S.); (Y.L.)
| | - Won Bin Kim
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon 16419, Korea; (W.B.K.); (H.S.J.)
| | - Tae Soo Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; (T.S.K.); (K.C.); (K.K.)
| | - Kiwon Cho
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; (T.S.K.); (K.C.); (K.K.)
| | - Kibum Kang
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; (T.S.K.); (K.C.); (K.K.)
| | - Hyun Suk Jung
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon 16419, Korea; (W.B.K.); (H.S.J.)
| | - Jeongyong Kim
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Korea; (S.R.); (A.S.S.); (Y.L.)
- Correspondence:
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9
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Ionic liquid – Assisted synthesis of silver mesoparticles as efficient surface enhanced Raman scattering substrates. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112929] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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10
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Díaz-Liñán MC, García-Valverde MT, López-Lorente AI, Cárdenas S, Lucena R. Silver nanoflower-coated paper as dual substrate for surface-enhanced Raman spectroscopy and ambient pressure mass spectrometry analysis. Anal Bioanal Chem 2020; 412:3547-3557. [DOI: 10.1007/s00216-020-02603-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 02/12/2020] [Accepted: 03/16/2020] [Indexed: 12/14/2022]
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Ag Nanostructures with Spikes on Adhesive Tape as a Flexible Sers-Active Substrate for In Situ Trace Detection of Pesticides on Fruit Skin. NANOMATERIALS 2019; 9:nano9121750. [PMID: 31835301 PMCID: PMC6956212 DOI: 10.3390/nano9121750] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 12/04/2019] [Accepted: 12/06/2019] [Indexed: 11/17/2022]
Abstract
Nanostructures with spikes (NSPs) have been a subject of several surface-enhanced Raman scattering (SERS) applications owing to their significant Raman signal enhancement brought about by the combined effects of interspike coupling and the accumulated induction on the tips of spikes. Thus, NSPs offer great potential as a SERS-active substrate for relevant applications that require a high density of enhanced “hot spots”. In this study, Ag NSPs were synthesized in varying degrees of agglomeration and were thereafter deposited onto a transparent adhesive tape as a flexible substrate for SERS applications, specifically, in the detection of trace amounts of pesticides. These flexible substrates were referred to as Ag NSPs/tape and optimized with an enhancement factor (EF) of ca. 1.7 × 107. A strong resulting signal enhancement could be attributed to an optimal degree of agglomeration and, consequently, the distances among/between spikes. Long spikes on the synthesized core of Ag NSPs tend to be loosely spaced, which are suitable in detecting relatively large molecules that could access the spaces among the spikes where “hot spots” are generally formed. Since one side of the transparent tape is adhesive, the paste-and-peel off method was successful in obtaining phosmet and carbaryl residues from apple peels as reflected in the acquired SERS spectra. In situ trace detection of the pesticides at low concentrations down to 10−7 M could be demonstrated. In situ trace detection of mixed pesticides was possible as the characteristic peaks of both pesticides were observed in equimolar mixtures of the analytes at 10−2 to 10−4 M. This study is, thus, premised upon applying for in situ trace detection on e.g., fruit skin.
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Ferreira N, Marques A, Águas H, Bandarenka H, Martins R, Bodo C, Costa-Silva B, Fortunato E. Label-Free Nanosensing Platform for Breast Cancer Exosome Profiling. ACS Sens 2019; 4:2073-2083. [PMID: 31327232 DOI: 10.1021/acssensors.9b00760] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Breast cancer accounts for 11.6% of all cancer cases in both genders. Even though several diagnostic techniques have been developed, the mostly used are invasive, complex, time-consuming, and cannot guarantee an early diagnosis, significantly constraining the tumor treatment success rate. Exosomes are extracellular vesicles that carry biomolecules from tissues to the peripheral circulation, representing an emerging noninvasive source of markers for early cancer diagnosis. Current techniques for exosomes analysis are frequently complex, time-consuming, and expensive. Raman spectroscopy interest has risen lately, because of its nondestructive analysis and little to no sample preparation, while having very low analyte concentration/volume, because of surface enhancement signal (SERS) possibility. However, active SERS substrates are needed, and commercially available substrates come with a high cost and low shelf life. In this work, composites of commercial nata de coco to produce bacterial nanocellulose and in-situ-synthesized silver nanoparticles are tested as SERS substrates, with a low cost and green approach. Enhancement factors from 104 to 105 were obtained, detecting Rhodamine 6G (R6G) concentrations as low as 10-11 M. Exosome samples coming from MCF-10A (nontumorigenic breast epithelium) and MDA-MB-231 (breast cancer) cell cultures were tested on the synthesized substrates, and the obtained Raman spectra were subjected to statistical principal component analysis (PCA). Combining PCA with Raman intravariability and intervariability in exosomal samples, data grouping with 95% confidence was possible, serving as a low-cost, green, and label-free diagnosis method, with promising applicability in clinical settings.
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Affiliation(s)
- Nuno Ferreira
- i3N
- CENIMAT, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
| | - Ana Marques
- i3N
- CENIMAT, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
| | - Hugo Águas
- i3N
- CENIMAT, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
| | - Hanna Bandarenka
- Laboratory of Applied Plasmonics, Belarusian State University of Informatics and Radioelectronics, 220013 Minsk, Belarus
| | - Rodrigo Martins
- i3N
- CENIMAT, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
| | - Cristian Bodo
- Champalimaud Research, Champalimaud Centre for the Unknown, 1400-038 Lisbon, Portugal
| | - Bruno Costa-Silva
- Champalimaud Research, Champalimaud Centre for the Unknown, 1400-038 Lisbon, Portugal
| | - Elvira Fortunato
- i3N
- CENIMAT, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
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Chang H, Lee YY, Lee HE, Ahn HY, Ko E, Nam KT, Jeong DH. Size-controllable and uniform gold bumpy nanocubes for single-particle-level surface-enhanced Raman scattering sensitivity. Phys Chem Chem Phys 2019; 21:9044-9051. [DOI: 10.1039/c9cp00138g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Gold nanocubes modified to form roughened structures with very strong and uniform single-particle surface-enhanced Raman scattering intensity were developed.
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Affiliation(s)
- Hyejin Chang
- Division of Science Education
- Kangwon National University
- Chuncheon 24341
- Republic of Korea
| | - Yoon Young Lee
- Department of Materials Science and Engineering
- Seoul National University
- Seoul 08826
- Republic of Korea
| | - Hye Eun Lee
- Department of Materials Science and Engineering
- Seoul National University
- Seoul 08826
- Republic of Korea
| | - Hyo-Yong Ahn
- Department of Materials Science and Engineering
- Seoul National University
- Seoul 08826
- Republic of Korea
| | - Eunbyeol Ko
- Department of Chemistry Education
- Seoul National University
- Seoul 08826
- Republic of Korea
| | - Ki Tae Nam
- Department of Materials Science and Engineering
- Seoul National University
- Seoul 08826
- Republic of Korea
| | - Dae Hong Jeong
- Department of Chemistry Education
- Seoul National University
- Seoul 08826
- Republic of Korea
- Center for Education Research
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15
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Roy S, Choi W, Jeon S, Kim DH, Kim H, Yun SJ, Lee Y, Lee J, Kim YM, Kim J. Atomic Observation of Filling Vacancies in Monolayer Transition Metal Sulfides by Chemically Sourced Sulfur Atoms. NANO LETTERS 2018; 18:4523-4530. [PMID: 29921125 DOI: 10.1021/acs.nanolett.8b01714] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Chemical treatment using bis(trifluoromethane) sulfonimide (TFSI) was shown to be particularly effective for increasing the photoluminescence (PL) of monolayer (1L) MoS2, suggesting a convenient method for overcoming the intrinsically low quantum yield of this material. However, the underlying atomic mechanism of the PL enhancement has remained elusive. Here, we report the microscopic origin of the defect healing observed in TFSI-treated 1L-MoS2 through a correlative combination of optical characterization and atomic-scale scanning transmission electron microscopy, which showed that most of the sulfur vacancies were directly repaired by the extrinsic sulfur atoms produced from the dissociation of TFSI, concurrently resulting in a significant PL enhancement. Density functional theory calculations confirmed that the reactive sulfur dioxide molecules that dissociated from TFSI can be reduced to sulfur and oxygen gas at the vacancy site to form strongly bound S-Mo. Our results reveal how defect-mediated nonradiative recombination can be effectively eliminated by a simple chemical treatment method, thereby advancing the practical applications of monolayer semiconductors.
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Affiliation(s)
- Shrawan Roy
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Republic of Korea
- IBS Center for Integrated Nanostructure Physics , Institute for Basic Science , Suwon 16419 , Republic of Korea
| | - Wooseon Choi
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - Sera Jeon
- Department of Physics , Pusan National University , Busan 46241 , Republic of Korea
| | - Do-Hwan Kim
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - Hyun Kim
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Republic of Korea
- IBS Center for Integrated Nanostructure Physics , Institute for Basic Science , Suwon 16419 , Republic of Korea
| | - Seok Joon Yun
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Republic of Korea
- IBS Center for Integrated Nanostructure Physics , Institute for Basic Science , Suwon 16419 , Republic of Korea
| | - Yongjun Lee
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Republic of Korea
- IBS Center for Integrated Nanostructure Physics , Institute for Basic Science , Suwon 16419 , Republic of Korea
| | - Jaekwang Lee
- Department of Physics , Pusan National University , Busan 46241 , Republic of Korea
| | - Young-Min Kim
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Republic of Korea
- IBS Center for Integrated Nanostructure Physics , Institute for Basic Science , Suwon 16419 , Republic of Korea
| | - Jeongyong Kim
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Republic of Korea
- IBS Center for Integrated Nanostructure Physics , Institute for Basic Science , Suwon 16419 , Republic of Korea
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Khan FA, Ajmal CM, Bae S, Seo S, Moon H, Baik S. Silver Nanoflower Decorated Graphene Oxide Sponges for Highly Sensitive Variable Stiffness Stress Sensors. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1800549. [PMID: 29756315 DOI: 10.1002/smll.201800549] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 03/29/2018] [Indexed: 05/25/2023]
Abstract
Soft conductive materials should enable large deformation while keeping high electrical conductivity and elasticity. The graphene oxide (GO)-based sponge is a potential candidate to endow large deformation. However, it typically exhibits low conductivity and elasticity. Here, the highly conductive and elastic sponge composed of GO, flower-shaped silver nanoparticles (AgNFs), and polyimide (GO-AgNF-PI sponge) are demonstrated. The average pore size and porosity are 114 µm and 94.7%, respectively. Ag NFs have thin petals (8-20 nm) protruding out of the surface of a spherical bud (300-350 nm) significantly enhancing the specific surface area (2.83 m2 g-1 ). The electrical conductivity (0.306 S m-1 at 0% strain) of the GO-AgNF-PI sponge is increased by more than an order of magnitude with the addition of Ag NFs. A nearly perfect elasticity is obtained over a wide compressive strain range (0-90%). The strain-dependent, nonlinear variation of Young's modulus of the sponge provides a unique opportunity as a variable stiffness stress sensor that operates over a wide stress range (0-10 kPa) with a high maximum sensitivity (0.572 kPa-1 ). It allows grasping of a soft rose and a hard bottle, with the minimal object deformation, when attached on the finger of a robot gripper.
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Affiliation(s)
- Fakhre Alam Khan
- School of Mechanical Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Korea
| | - C Muhammed Ajmal
- Department of Energy Science, Sungkyunkwan University (SKKU), Suwon, 16419, Korea
| | - Seonghyun Bae
- School of Mechanical Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Korea
| | - Sungwon Seo
- School of Mechanical Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Korea
| | - Hyungpil Moon
- School of Mechanical Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Korea
| | - Seunghyun Baik
- School of Mechanical Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Suwon, 16419, Korea
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17
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Das R, Soni RK. Rhodium nanocubes and nanotripods for highly sensitive ultraviolet surface-enhanced Raman spectroscopy. Analyst 2018; 143:2310-2322. [PMID: 29687108 DOI: 10.1039/c8an00341f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We report the shape- and wavelength-dependent ultrasensitive label-free detection of adenine on rhodium cube- and tripod-star-like nanoparticles (Rh NPs) using ultraviolet surface-enhanced Raman scattering (UV-SERS). Rh NPs immobilized on a silane-treated glass substrate probed at near-resonant and non-resonant wavelengths served as the SERS platform for the highly reproducible, stable, and real-time detection of adsorbed adenine molecules in the femtomolar region. The sensitivity of SERS-active Rh NPs displaying LSPR in the UV region was exploited for the 266 nm (DUV), 325 nm (UV) and 532 nm (visible) Raman excitation wavelengths. With the 266 nm and 325 nm DUV-UV excitation lines, for the Rh tripod geometry near or pre-resonant excitation being closer to the analyte absorption band combined with the intrinsic UV-LSPR resonant energy produced a SERS enhancement factor as high as 105 and accelerated photoinduced degradations compared to 532 nm for our substrates. Computational results consistent with the experiment clearly demonstrated that the NP SERS enhancement was sensitive to both the intrinsic optical properties of Rh in the UV region and the excitation closer to the LSPR peak producing larger EM enhancements. The wavelength-dependent correlations between the optical properties of the shape-tailored Rh NPs and SERS enhancements envisage the merit and demerit of DUV-UV excitation over visible excitation for Raman measurements. The as-fabricated SERS substrate could also be efficiently recycled using O2 plasma for the detection of other biomolecules. The use of oxide-free transition metal Rh and DUV-UV excitation thereby extends the improved generality of the SERS technique for ultrasensitive bimolecular detection and for gaining a comprehensive understanding of UV-SERS-based applications.
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Affiliation(s)
- Rupali Das
- Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, India.
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