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Kaur G, Kaur V, Kaur N, Kaur C, Sood K, Shanavas A, Sen T. Design of Silica@Au Hybrid Nanostars for Enhanced SERS and Photothermal Effect. Chemphyschem 2023; 24:e202200809. [PMID: 37515550 DOI: 10.1002/cphc.202200809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 04/21/2023] [Accepted: 07/25/2023] [Indexed: 07/31/2023]
Abstract
Core-shell nanostructures of silicon oxide@noble metal have drawn a lot of interest due to their distinctive characteristics and minimal toxicity with remarkable biocompatibility. Due to the unique property of localized surface plasmon resonance (LSPR), plasmonic nanoparticles are being used as surface-enhanced Raman scattering (SERS) based detection of pollutants and photothermal (PT) agents in cancer therapy. Herein, we demonstrate the synthesis of multifunctional silica core - Au nanostars shell (SiO2 @Au NSs) nanostructures using surfactant free aqueous phase method. The SERS performance of the as-synthesized anisotropic core-shell NSs was examined using Rhodamine B (RhB) dye as a Raman probe and resulted in strong enhancement factor of 1.37×106 . Furthermore, SiO2 @Au NSs were also employed for PT killing of breast cancer cells and they exhibited a concentration-dependent increase in the photothermal effect. The SiO2 @Au NSs show remarkable photothermal conversion efficiency of up to 72 % which is unprecedented. As an outcome, our synthesized NIR active SiO2 @Au NSs are of pivotal importance to have their dual applications in SERS enhancement and PT effect.
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Affiliation(s)
- Gagandeep Kaur
- Institute of Nano Science and Technology, Sector- 81, Knowledge city, 140306, Mohali, India
| | - Vishaldeep Kaur
- Institute of Nano Science and Technology, Sector- 81, Knowledge city, 140306, Mohali, India
| | - Navneet Kaur
- Institute of Nano Science and Technology, Sector- 81, Knowledge city, 140306, Mohali, India
| | - Charanleen Kaur
- Institute of Nano Science and Technology, Sector- 81, Knowledge city, 140306, Mohali, India
| | - Kritika Sood
- Institute of Nano Science and Technology, Sector- 81, Knowledge city, 140306, Mohali, India
| | - Asifkhan Shanavas
- Institute of Nano Science and Technology, Sector- 81, Knowledge city, 140306, Mohali, India
| | - Tapasi Sen
- Institute of Nano Science and Technology, Sector- 81, Knowledge city, 140306, Mohali, India
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2
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Chuang YC, Hsia Y, Chu CH, Lin LJ, Sivasubramanian M, Lo LW. Precision control of the large-scale green synthesis of biodegradable gold nanodandelions as potential radiotheranostics. Biomater Sci 2019; 7:4720-4729. [PMID: 31495835 DOI: 10.1039/c9bm00897g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we report a new type of biodegradable, high surface-area gold nanodandelions (GNDs). This report possesses important features and some are the first of its kind: (1) the large scale green synthesis of GNDs with high monodispersity and a circa 100% yield with consistent chemistry, manufacturing and controls (CMC); (2) cellular/physiological degradability of GNDs leading to its disassembly into debris, which is indicative of the potential for possible body clearance; (3) precision control of the chemicophysical properties of the GNDs including shape, petal number and size, all can be judiciously fine-tuned by the synthetic parameters; (4) highly efficient radiotheranostics of GNDs encompassing better enhanced computed tomography (CT) contrast and pronounced X-ray induced reactive oxygen species (ROS) generation than conventional spherical gold nanoparticles (AuNP). It is noteworthy that the GNDs demonstrate a unique combinational effect of radiosensitization (production of superoxide anions and hydroxyl radicals) and type II photodynamic interaction (generation of singlet oxygen). Given the above, our reported GNDs are promising in clinical translation as radiotheranostics.
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Affiliation(s)
- Yao-Chen Chuang
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan.
| | - Yu Hsia
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan. and Institute of Biotechnology, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Chia-Hui Chu
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan.
| | - Li-Jie Lin
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan.
| | - Maharajan Sivasubramanian
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan.
| | - Leu-Wei Lo
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan.
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van Enter BJ, von Hauff E. Challenges and perspectives in continuous glucose monitoring. Chem Commun (Camb) 2018; 54:5032-5045. [PMID: 29687110 DOI: 10.1039/c8cc01678j] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Diabetes is a global epidemic that threatens the health and well-being of hundreds of millions of people. The first step in patient treatment is to monitor glucose levels. Currently this is most commonly done using enzymatic strips. This approach suffers from several limitations, namely it requires a blood sample and is therefore invasive, the quality and the stability of the enzymatic strips vary widely, and the patient is burdened by performing the measurement themselves. This results in dangerous fluctuations in glucose levels often going undetected. There is currently intense research towards new approaches in glucose detection that would enable non-invasive continuous glucose monitoring (CGM). In this review, we explore the state-of-the-art in glucose detection technologies. In particular, we focus on the physical mechanisms behind different approaches, and how these influence and determine the accuracy and reliability of glucose detection. We begin by reviewing the basic physical and chemical properties of the glucose molecule. Although these play a central role in detection, especially the anomeric ratio, they are surprisingly often overlooked in the literature. We then review state-of-the art and emerging detection methods. Finally, we survey the current market for glucometers. Recent results show that past challenges in glucose detection are now being overcome, thereby enabling the development of smart wearable devices for non-invasive continuous glucose monitoring. These new directions in glucose detection have enormous potential to improve the quality of life of millions of diabetics, as well as offer insight into the development, treatment and even prevention of the disease.
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Affiliation(s)
- Benjamin Jasha van Enter
- Physics of Energy Department of Physics and Astronomy, Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands.
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4
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Sustained and Cost Effective Silver Substrate for Surface Enhanced Raman Spectroscopy Based Biosensing. Sci Rep 2017; 7:6917. [PMID: 28761047 PMCID: PMC5537298 DOI: 10.1038/s41598-017-07186-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 06/22/2017] [Indexed: 01/10/2023] Open
Abstract
While surface enhanced Raman spectroscopy (SERS) based biosensing has demonstrated great potential for point-of-care diagnostics in the laboratory, its application in the field is limited by the short life time of commonly used silver based SERS active substrates. In this work, we report our attempt towards SERS based field biosensing, involving the development of a novel sustained and cost-effective substrate composed of silver nanoparticles protected by small nitrogen-doped Graphene Quantum Dots, i.e. Ag NP@N-GQD, and its systematic evaluation for glucose sensing. The new substrate demonstrated significantly stronger Raman enhancement compared to pure silver nanoparticles. More importantly, the new substrate preserved SERS performance in a normal indoor environment for at least 30 days in both the wet and dry states, in contrast to only 10 days for pure silver nanoparticles. The Ag NP@N-GQD thin film in the dry state was then successfully applied as a SERS substrate for glucose detection in mouse blood samples. The new substrate was synthesized under mild experimental conditions, and the cost increase due to N-GQD was negligible. These results suggest that the Ag NP@N-GQD is a cost-effective and sustained SERS substrate, the development of which represents an important step towards SERS based field biosensing.
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5
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Kwak SY, Wong MH, Lew TTS, Bisker G, Lee MA, Kaplan A, Dong J, Liu AT, Koman VB, Sinclair R, Hamann C, Strano MS. Nanosensor Technology Applied to Living Plant Systems. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2017; 10:113-140. [PMID: 28605605 DOI: 10.1146/annurev-anchem-061516-045310] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
An understanding of plant biology is essential to solving many long-standing global challenges, including sustainable and secure food production and the generation of renewable fuel sources. Nanosensor platforms, sensors with a characteristic dimension that is nanometer in scale, have emerged as important tools for monitoring plant signaling pathways and metabolism that are nondestructive, minimally invasive, and capable of real-time analysis. This review outlines the recent advances in nanotechnology that enable these platforms, including the measurement of chemical fluxes even at the single-molecule level. Applications of nanosensors to plant biology are discussed in the context of nutrient management, disease assessment, food production, detection of DNA proteins, and the regulation of plant hormones. Current trends and future needs are discussed with respect to the emerging trends of precision agriculture, urban farming, and plant nanobionics.
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Affiliation(s)
- Seon-Yeong Kwak
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachussetts 02139;
| | - Min Hao Wong
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachussetts 02139;
| | - Tedrick Thomas Salim Lew
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachussetts 02139;
| | - Gili Bisker
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachussetts 02139;
| | - Michael A Lee
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachussetts 02139;
| | - Amir Kaplan
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachussetts 02139;
| | - Juyao Dong
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachussetts 02139;
| | - Albert Tianxiang Liu
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachussetts 02139;
| | - Volodymyr B Koman
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachussetts 02139;
| | - Rosalie Sinclair
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachussetts 02139;
| | - Catherine Hamann
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachussetts 02139;
| | - Michael S Strano
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachussetts 02139;
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Vijayaraghavan P, Liu CH, Hwang KC. Synthesis of Multibranched Gold Nanoechinus Using a Gemini Cationic Surfactant and Its Application for Surface Enhanced Raman Scattering. ACS APPLIED MATERIALS & INTERFACES 2016; 8:23909-19. [PMID: 27556284 DOI: 10.1021/acsami.6b07218] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
High-yield multibranched Au nanoechinus possessing lengthy and dense branched nanorods on the surface were synthesized using a seed-mediated surfactant-directed approach in the presence of gemini cationic surfactant N,N,N'N'-tetramethyl-N,N'-ditetradecylethane-1,2-diaminium bromide (C14C2C14Br2), HAuCl4, AgNO3, and ascorbic acid. C14C2C14Br2 surfactant provides a versatile template in designing the unique morphology of Au nanoechinus with the assistance of AgNO3. UV-vis spectroscopic analysis proves that Au nanoechinus possess a unique intense broad localized surface plasmon resonance (LSPR) peak, which extends from 400 to 1700 nm in the NIR region making a highly potential platform for biomedical applications. Systematic time-dependent TEM, UV-vis-NIR, and XRD analysis were performed to monitor the morphological evolution of multibranched Au nanoechinus. It was found that the surface of branched nanorods of Au NE preferentially grew along (111) crystal planes. Furthermore, as-synthesized Au nanoechinus shows excellent SERS enhancement ability for dopamine inside HeLa cells.
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Affiliation(s)
- Priya Vijayaraghavan
- Department of Chemistry, National Tsing Hua University , Hsinchu 300, Taiwan, R.O.C
| | - Cheng-Hong Liu
- Department of Chemistry, National Tsing Hua University , Hsinchu 300, Taiwan, R.O.C
| | - Kuo Chu Hwang
- Department of Chemistry, National Tsing Hua University , Hsinchu 300, Taiwan, R.O.C
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7
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Cepeda-Pérez E, López-Luke T, Plascencia-Villa G, Perez-Mayen L, Ceja-Fdez A, Ponce A, Vivero-Escoto J, de la Rosa E. SERS and integrative imaging upon internalization of quantum dots into human oral epithelial cells. JOURNAL OF BIOPHOTONICS 2016; 9:683-693. [PMID: 27120043 DOI: 10.1002/jbio.201600034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 04/01/2016] [Accepted: 04/03/2016] [Indexed: 06/05/2023]
Abstract
CdTe quantum dots (QDs) are widely used in bio-applications due to their size and highly efficient optical properties. However internalization mechanisms thereof for the variety of freshly extracted, not cultivated human cells and their specific molecular interactions remains an open topic for discussion. In this study, we assess the internalization mechanism of CdTe quantum dots (3.3 nm) capped with thioglycolic acid using non cultivated oral epithelial cells obtained from healthy donors. Naked gold nanoparticles (40 nm) were successfully used as nanosensors for surface-enhanced Raman spectroscopy to efficiently identify characteristic Raman peaks, providing new evidence indicating that the first interactions of these QDs with epithelial cells occurred preferentially with aromatic rings and amine groups of amino acid residues and glycans from trans-membrane proteins and cytoskeleton. Using an integrative combination of advanced imaging techniques, including ultra-high resolution SEM, high resolution STEM coupled with EDX spectroscopy together with the results obtained by Raman spectroscopy, it was determined that thioglycolic acid capped CdTe QDs are efficiently internalized into freshly extracted oral epithelial cells only by facilitated diffusion, distributed into cytoplasm and even within the cell nucleus in three minutes.
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Affiliation(s)
| | | | - Germán Plascencia-Villa
- Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA
| | | | | | - Arturo Ponce
- Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA
| | - Juan Vivero-Escoto
- The University of North Carolina-Charlotte, Department of Chemistry, 9201 University City Blvd., Charlotte, NC 28223, USA
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8
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Perez-Mayen L, Oliva J, Salas P, De la Rosa E. Nanomolar detection of glucose using SERS substrates fabricated with albumin coated gold nanoparticles. NANOSCALE 2016; 8:11862-11869. [PMID: 27230115 DOI: 10.1039/c6nr00163g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This work presents the design of substrates for Surface Enhanced Raman Scattering (SERS) using star-like gold nanoparticles synthesized by a wet chemical method. The SERS substrates were used for glucose detection for concentrations as low as 10(-7) M, which represents an enhancement factor (EF) of 10(9), as a result of the hot spot formed by the spike termination and appropriate distribution of the gold nanoparticles. An improvement of two orders of magnitude was obtained by coating the gold nanoparticles with albumin with the configuration: glass/Au nanoparticles/albumin. In this case the lowest detection was at a concentration of 10(-9) M for an EF of 10(11). The albumin molecule allowed us to enhance the Raman signal because of the formation of peptide bonds (COOH-NH2) generated due to the interaction of glucose with albumin, and the appropriate separation distance between the glucose molecules and gold nanoparticles. The presence of such peptide conjugates was confirmed by FTIR spectra. Thus, our results suggest that our SERS substrates can be useful for the detection of very low concentrations of glucose, which is important for the diagnosis of diabetes in the field of medicine.
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Affiliation(s)
| | - Jorge Oliva
- Centro de Investigaciones en Óptica A.C., A.P. 1-948, León, Gto 37160, México.
| | - P Salas
- Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, A.P. 1-1010, Querétaro, Qro. 76000, México
| | - Elder De la Rosa
- Centro de Investigaciones en Óptica A.C., A.P. 1-948, León, Gto 37160, México.
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9
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Cepeda-Pérez E, López-Luke T, Salas P, Plascencia-Villa G, Ponce A, Vivero-Escoto J, José-Yacamán M, de la Rosa E. SERS-active Au/SiO2 clouds in powder for rapid ex vivo breast adenocarcinoma diagnosis. BIOMEDICAL OPTICS EXPRESS 2016; 7:2407-18. [PMID: 27375955 PMCID: PMC4918593 DOI: 10.1364/boe.7.002407] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 04/27/2016] [Accepted: 05/17/2016] [Indexed: 05/26/2023]
Abstract
In the present work, we report a dry-based application technique of Au/SiO2 clouds in powder for rapid ex vivo adenocarcinoma diagnosis through surface-enhanced Raman scattering (SERS); using low laser power and an integration time of one second. Several characteristic Raman peaks frequently used for the diagnosis of breast adenocarcinoma in the range of the amide III are successfully enhanced by breading the tissue with Au/SiO2 powder. The SERS activity of these Au/SiO2 powders is attributed to their rapid rehydration upon contact with the wet tissues, which promotes the formation of gold nanoparticle aggregates. The propensity of the Au/SiO2 cloud structures to adsorb biomolecules in the vicinity of the gold nanoparticle clusters promotes the necessary conditions for SERS detection. In addition, electron microscopy, together with elemental analysis, have been used to confirm the structure of the new Au/SiO2 cloud material and to investigate its distribution in breast tissues.
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Affiliation(s)
| | | | - Pedro Salas
- Universidad Nacional Autónoma de México, Centro de Física Aplicada y Tecnología Avanzada, Querétaro 76000, Mexico
| | - Germán Plascencia-Villa
- Department of Physics and Astronomy, The University of Texas at San Antonio (UTSA), One UTSA Circle, San Antonio, USA
| | - Arturo Ponce
- Department of Physics and Astronomy, The University of Texas at San Antonio (UTSA), One UTSA Circle, San Antonio, USA
| | - Juan Vivero-Escoto
- Department of Chemistry, The University of North Carolina at Charlotte, 9201 University City Blvd. Charlotte, NC 28223, USA
| | - Miguel José-Yacamán
- Department of Physics and Astronomy, The University of Texas at San Antonio (UTSA), One UTSA Circle, San Antonio, USA
| | - Elder de la Rosa
- Centro de Investigaciones en Óptica, León, Gto., C.P. 37150, Mexico
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Nitrogen-Doped Carbon Dots as A New Substrate for Sensitive Glucose Determination. SENSORS 2016; 16:s16050630. [PMID: 27153071 PMCID: PMC4883321 DOI: 10.3390/s16050630] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 04/15/2016] [Accepted: 04/21/2016] [Indexed: 11/16/2022]
Abstract
Nitrogen-doped carbon dots are introduced as a novel substrate suitable for enzyme immobilization in electrochemical detection metods. Nitrogen-doped carbon dots are easily synthesised from polyacrylamide in just one step. With the help of the amino group on chitosan, glucose oxidase is immobilized on nitrogen-doped carbon dots-modified carbon glassy electrodes by amino-carboxyl reactions. The nitrogen-induced charge delocalization at nitrogen-doped carbon dots can enhance the electrocatalytic activity toward the reduction of O₂. The specific amino-carboxyl reaction provides strong and stable immobilization of GOx on electrodes. The developed biosensor responds efficiently to the presence of glucose in serum samples over the concentration range from 1 to 12 mM with a detection limit of 0.25 mM. This novel biosensor has good reproducibility and stability, and is highly selective for glucose determination under physiological conditions. These results indicate that N-doped quantum dots represent a novel candidate material for the construction of electrochemical biosensors.
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11
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Choi S, Moon Y, Yoo H. Finely tunable fabrication and catalytic activity of gold multipod nanoparticles. J Colloid Interface Sci 2016; 469:269-276. [DOI: 10.1016/j.jcis.2016.02.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 02/04/2016] [Accepted: 02/05/2016] [Indexed: 10/22/2022]
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12
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Bartkowiak D, Merk V, Reiter-Scherer V, Gernert U, Rabe JP, Kneipp J, Kemnitz E. Porous MgF2-over-gold nanoparticles (MON) as plasmonic substrate for analytical applications. RSC Adv 2016. [DOI: 10.1039/c6ra10501g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Porous MgF2-over-nanoparticles (MON) surfaces are fabricated from immobilized gold nanoparticles of different sizes on a glass surface by coating them with a magnesium fluoride layer, resulting in favorable optical and mechanical properties.
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Affiliation(s)
- D. Bartkowiak
- Humboldt-Universität zu Berlin
- Department of Chemistry
- 12489 Berlin
- Germany
- Humboldt-Universität zu Berlin
| | - V. Merk
- Humboldt-Universität zu Berlin
- Department of Chemistry
- 12489 Berlin
- Germany
- Humboldt-Universität zu Berlin
| | - V. Reiter-Scherer
- Humboldt-Universität zu Berlin
- Department of Physics & IRIS Adlershof
- 12489 Berlin
- Germany
| | - U. Gernert
- Technische Universität Berlin
- Center for Electron Microscopy (ZELMI)
- Berlin
- Germany
| | - J. P. Rabe
- Humboldt-Universität zu Berlin
- Department of Physics & IRIS Adlershof
- 12489 Berlin
- Germany
| | - J. Kneipp
- Humboldt-Universität zu Berlin
- Department of Chemistry
- 12489 Berlin
- Germany
| | - E. Kemnitz
- Humboldt-Universität zu Berlin
- Department of Chemistry
- 12489 Berlin
- Germany
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13
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Zeng Z, Liu Y, Wei J. Recent advances in surface-enhanced raman spectroscopy (SERS): Finite-difference time-domain (FDTD) method for SERS and sensing applications. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2015.06.009] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Wallace GQ, Tabatabaei M, Zuin MS, Workentin MS, Lagugné-Labarthet F. A nanoaggregate-on-mirror platform for molecular and biomolecular detection by surface-enhanced Raman spectroscopy. Anal Bioanal Chem 2015; 408:609-18. [PMID: 26521177 DOI: 10.1007/s00216-015-9142-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 10/07/2015] [Accepted: 10/21/2015] [Indexed: 12/13/2022]
Abstract
A nanoaggregate-on-mirror (NAOM) structure has been developed for molecular and biomolecular detection using surface-enhanced Raman spectroscopy (SERS). The smooth surface of the gold mirror allows for simple and homogeneous functionalization, while the introduction of the nanoaggregates enhances the Raman signal of the molecule(s) in the vicinity of the aggregate-mirror junction. This is evidenced by functionalizing the gold mirror with 4-nitrothiophenol, and the further addition of gold nanoaggregates promotes local SERS activity only in the areas with the nanoaggregates. The application of the NAOM platform for biomolecular detection is highlighted using glucose and H2O2 as molecules of interest. In both cases, the gold mirror is functionalized with 4-mercaptophenylboronic acid (4-MPBA). Upon exposure to glucose, the boronic acid moiety of 4-MPBA forms a cyclic boronate ester. Once the nanoaggregates are added to the surface, detection of glucose is possible without the use of an enzyme. This method of indirect detection provides a limit of detection of 0.05 mM, along with a linear range of detection from 0.1 to 15 mM for glucose, encompassing the physiological range of blood glucose concentration. The detection of H2O2 is achieved with optical inspection and SERS. The H2O2 interferes with the coating of the gold mirror, enabling qualitative detection by visual inspection. Simultaneously, the H2O2 reacts with the boronic acid to form a phenol, a change that is detected by SERS.
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Affiliation(s)
- Gregory Q Wallace
- Department of Chemistry, University of Western Ontario, 1151 Richmond St., London, Ontario, N6A 5B7, Canada.,Centre for Advanced Materials and Biomaterials Research, University of Western Ontario, 1151 Richmond St., London, Ontario, N6A 5B7, Canada
| | - Mohammadali Tabatabaei
- Department of Chemistry, University of Western Ontario, 1151 Richmond St., London, Ontario, N6A 5B7, Canada.,Centre for Advanced Materials and Biomaterials Research, University of Western Ontario, 1151 Richmond St., London, Ontario, N6A 5B7, Canada
| | - Mariachiara S Zuin
- Department of Chemistry, University of Western Ontario, 1151 Richmond St., London, Ontario, N6A 5B7, Canada.,Centre for Advanced Materials and Biomaterials Research, University of Western Ontario, 1151 Richmond St., London, Ontario, N6A 5B7, Canada
| | - Mark S Workentin
- Department of Chemistry, University of Western Ontario, 1151 Richmond St., London, Ontario, N6A 5B7, Canada.,Centre for Advanced Materials and Biomaterials Research, University of Western Ontario, 1151 Richmond St., London, Ontario, N6A 5B7, Canada
| | - François Lagugné-Labarthet
- Department of Chemistry, University of Western Ontario, 1151 Richmond St., London, Ontario, N6A 5B7, Canada. .,Centre for Advanced Materials and Biomaterials Research, University of Western Ontario, 1151 Richmond St., London, Ontario, N6A 5B7, Canada.
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15
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Li Y, Zhang K, Zhao J, Ji J, Ji C, Liu B. A three-dimensional silver nanoparticles decorated plasmonic paper strip for SERS detection of low-abundance molecules. Talanta 2015; 147:493-500. [PMID: 26592638 DOI: 10.1016/j.talanta.2015.10.025] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 10/09/2015] [Accepted: 10/11/2015] [Indexed: 12/24/2022]
Abstract
The fabrication of SERS substrates, which can offer the advantages of strong Raman signal enhancement with good reproducibility and low cost, is still a challenge for practical applications. In this work, a simple three-dimensional (3D) paper-based SERS substrate, which contains plasmonic silver-nanoparticles (AgNPs), has been developed by the silver mirror reaction. This paper strip was characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray diffraction (XRD), etc. Pretreatment of the paper as well as the reaction time, temperature, and reagent concentrations for the silver mirror reaction were varied for further studies. With the optimized experimental parameters, the AgNPs synthesized and distributed in-situ on the paper strip could give more favorable SERS performance. The limit of detection (LOD) as low as 10(-11)M for Rhodamine 6G (R6G) and 10(-9)M for p-aminothiophenol (p-ATP) plus wide linear range for the log-log plot of Raman intensity versus analyte concentration were achieved. The detection of R6G in rain water was also carried out successfully. The merits of this protocol include low cost, easy operation, high sensitivity and acceptable stability, which make it ideal for the detection of environmental samples in trace amounts.
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Affiliation(s)
- Yixin Li
- Department of Chemistry and State Key Lab of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China
| | - Kun Zhang
- Department of Chemistry and State Key Lab of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China
| | - Jingjing Zhao
- Department of Chemistry and State Key Lab of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China
| | - Ji Ji
- Department of Chemistry and State Key Lab of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China.
| | - Chang Ji
- Department of Chemistry and Biochemistry, Texas State University, 601 University Drive, San Marcos, Texas 78666, USA
| | - Baohong Liu
- Department of Chemistry and State Key Lab of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China.
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Chaudhary A, Gupta A, Nandi CK. Anisotropic gold nanoparticles for the highly sensitive colorimetric detection of glucose in human urine. RSC Adv 2015. [DOI: 10.1039/c4ra16690f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
PEDOT:PSS modified anisotropic gold nanoparticles (GNP) for the colorimetric detection of glucose in urine.
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Affiliation(s)
| | - Abhishek Gupta
- School of Basic Sciences
- Indian Institute of Technology
- Mandi
- India
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