1
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Kim GW, Ha JW. Single-Particle Study on Hg Amalgamation Mechanism and Slow Inward Diffusion in Mesoporous Silica-Coated Gold Nanorods without Structural Deformation. J Phys Chem Lett 2022; 13:2607-2613. [PMID: 35293762 DOI: 10.1021/acs.jpclett.2c00189] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
This paper presents the structural and spectral variations of individual mesoporous silica-coated gold nanorods (AuNRs@mSiO2) compared to bare AuNRs upon Hg-Au amalgamation. First, the aspect ratio of AuNRs@mSiO2 exposed to Hg solutions was unchanged because the deformation related to the cores of AuNR was suppressed by the silica shell. Second, dark-field microscopy and spectroscopy revealed a blue shift of the localized surface plasmon resonance (LSPR) wavelength peak and strong plasmon damping in the individual AuNRs@mSiO2 scattering spectra, exposed to Hg solutions. Furthermore, we investigated time-dependent adsorption kinetics and spectral changes during the formation of Au-Hg amalgam in single AuNRs@mSiO2 over a long time frame without any disturbance from the structural deformation. The inward Hg diffusion into the AuNR core caused a gradual red shift and line width narrowing of the LSPR peak when AuNRs@mSiO2 were withdrawn from Hg solution. Thus, this paper provides new insights into the relationship among amalgamation process, morphological change, the role of silica shell, Hg inward diffusion, LSPR peak, and line width at the single-particle level.
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Affiliation(s)
- Geun Wan Kim
- Department of Chemistry, University of Ulsan, 93 Daehak-ro, Nam-gu, Ulsan 44610, South Korea
| | - Ji Won Ha
- Department of Chemistry, University of Ulsan, 93 Daehak-ro, Nam-gu, Ulsan 44610, South Korea
- Energy Harvest-Storage Research Center (EHSRC), University of Ulsan, 93 Daehak-ro, Nam-gu, Ulsan 44610, South Korea
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2
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Alizar YY, Ha JW. Single-particle spectroelectrochemistry: electrochemical tuning of plasmonic properties via mercury amalgamation in mesoporous silica coated gold nanorods without structural deformation. Analyst 2022; 147:2035-2039. [DOI: 10.1039/d2an00559j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper presented the possibility of the in situ tuning of the LSPR properties of AuNRs@mSiO2 by Hg deposition via electrochemical potential manipulations without the disturbance of the structural variations of AuNR cores.
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Affiliation(s)
- Yola Yolanda Alizar
- Advanced Nano-Bio-Imaging and Spectroscopy Laboratory, Department of Chemistry, University of Ulsan, 93 Daehak-ro, Nam-gu, Ulsan 44610, Republic of Korea
| | - Ji Won Ha
- Advanced Nano-Bio-Imaging and Spectroscopy Laboratory, Department of Chemistry, University of Ulsan, 93 Daehak-ro, Nam-gu, Ulsan 44610, Republic of Korea
- Energy Harvest-Storage Research Center (EHSRC), University of Ulsan, 93 Daehak-ro, Nam-gu, Ulsan, South Korea
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3
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Kim DM, Park JS, Jung SW, Yeom J, Yoo SM. Biosensing Applications Using Nanostructure-Based Localized Surface Plasmon Resonance Sensors. SENSORS (BASEL, SWITZERLAND) 2021; 21:3191. [PMID: 34064431 PMCID: PMC8125509 DOI: 10.3390/s21093191] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 04/30/2021] [Accepted: 05/03/2021] [Indexed: 01/06/2023]
Abstract
Localized surface plasmon resonance (LSPR)-based biosensors have recently garnered increasing attention due to their potential to allow label-free, portable, low-cost, and real-time monitoring of diverse analytes. Recent developments in this technology have focused on biochemical markers in clinical and environmental settings coupled with advances in nanostructure technology. Therefore, this review focuses on the recent advances in LSPR-based biosensor technology for the detection of diverse chemicals and biomolecules. Moreover, we also provide recent examples of sensing strategies based on diverse nanostructure platforms, in addition to their advantages and limitations. Finally, this review discusses potential strategies for the development of biosensors with enhanced sensing performance.
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Affiliation(s)
- Dong Min Kim
- Center for Applied Life Science, Hanbat National University, Daejeon 34158, Korea;
| | - Jong Seong Park
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Korea; (J.S.P.); (S.-W.J.); (J.Y.)
| | - Seung-Woon Jung
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Korea; (J.S.P.); (S.-W.J.); (J.Y.)
| | - Jinho Yeom
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Korea; (J.S.P.); (S.-W.J.); (J.Y.)
| | - Seung Min Yoo
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Korea; (J.S.P.); (S.-W.J.); (J.Y.)
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4
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Wang N, Liu G, Dai H, Ma H, Lin M. Spectroscopic evidence for electrochemical effect of mercury ions on gold nanoparticles. Anal Chim Acta 2019; 1062:140-146. [DOI: 10.1016/j.aca.2019.02.037] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 02/12/2019] [Accepted: 02/19/2019] [Indexed: 01/09/2023]
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5
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Song J, Zhao L, Wang Y, Xue Y, Deng Y, Zhao X, Li Q. Carbon Quantum Dots Prepared with Chitosan for Synthesis of CQDs/AuNPs for Iodine Ions Detection. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E1043. [PMID: 30551611 PMCID: PMC6315431 DOI: 10.3390/nano8121043] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 12/08/2018] [Accepted: 12/11/2018] [Indexed: 01/09/2023]
Abstract
Water-soluble and reductive carbon quantum dots (CQDs) were fabricated by the hydrothermal carbonization of chitosan. Acting as a reducing agent and stabilizer, the as-prepared CQDs were further used to synthesize gold nanoparticles (AuNPs). This synthetic process was carried out in aqueous solution, which was absolutely "green". Furthermore, the CQDs/AuNPs composite was used to detect iodine ions by the colorimetric method. A color change from pink to colorless was observed with the constant addition of I- ions, accompanied by a decrease in the absorbance of the CQDs/AuNPs composite. According to the absorbance change, a favorable linear relationship was obtained between ΔA and I- concentration in the range of 20⁻140 μM and 140⁻400 μM. The detection limit of iodide ions, depending on the 3δ/slope, was estimated to be 2.3 μM, indicating high sensitivity to the determination of iodide. More importantly, it also showed good selectivity toward I- over other anion ions, and was used for the analysis of salt samples. Moreover, TEM results indicated that I- ions induced the aggregation of CQDs/AuNPs, resulting in changes in color and absorbance.
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Affiliation(s)
- Juanjuan Song
- School of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China.
| | - Li Zhao
- School of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China.
| | - Yesheng Wang
- School of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China.
| | - Yun Xue
- School of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China.
| | - Yujia Deng
- School of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China.
| | - Xihui Zhao
- School of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China.
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials, Qingdao University, Qingdao 266071, China.
| | - Qun Li
- School of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China.
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials, Qingdao University, Qingdao 266071, China.
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6
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Govindaraju S, Puthiaraj P, Lee MH, Yun K. Photoluminescent AuNCs@UiO-66 for Ultrasensitive Detection of Mercury in Water Samples. ACS OMEGA 2018; 3:12052-12059. [PMID: 31459285 PMCID: PMC6645368 DOI: 10.1021/acsomega.8b01665] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 09/13/2018] [Indexed: 05/31/2023]
Abstract
In this work, we synthesized gold nanoclusters within a Zirconium-based metal-organic framework (AuNCs@UiO-66) that may create new prospects for the development of novel sensing materials for biosensor applications. The resulting AuNCs@UiO-66 nanocomposite exhibits red fluorescence with a high quantum yield (11%), and the AuNCs are homogeneously distributed along UiO-66. Analytical and morphological characterizations of the resulting material were carried out by UV-visible spectroscopy, photoluminescence spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and high-resolution transmission electron microscopy. The synthesized AuNCs@UiO-66 nanocomposite was used for the effective detection of Hg2+ ions with a detection limit as low as 77 pM. Moreover, the fabricated sensors also successfully detected Hg2+ in real water samples. This sensor is stable and highly fluorescent, developed using a simple fabrication method, and would be constructive for the detection of other metal ions and in biological applications.
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Affiliation(s)
- Saravanan Govindaraju
- Department
of Bio Nanotechnology, Gachon University, Seongnam-si, Gyeonggi-do 13120, Republic of Korea
| | - Pillaiyar Puthiaraj
- Department
of Chemistry and Chemical Engineering, Inha
University, Incheon 22212, Republic of Korea
| | - Min-Ho Lee
- School
of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Kyusik Yun
- Department
of Bio Nanotechnology, Gachon University, Seongnam-si, Gyeonggi-do 13120, Republic of Korea
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7
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Bhamore JR, Deshmukh B, Haran V, Jha S, Singhal RK, Lenka N, Kailasa SK, Murthy ZVP. One-step eco-friendly approach for the fabrication of synergistically engineered fluorescent copper nanoclusters: sensing of Hg2+ ion and cellular uptake and bioimaging properties. NEW J CHEM 2018. [DOI: 10.1039/c7nj04031h] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Schematic illustration for one-step green synthetic approach for fabrication of synergistically engineered CuNCs.
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Affiliation(s)
- Jigna R. Bhamore
- Department of Applied Chemistry
- S. V. National Institute of Technology
- Surat – 395 007
- India
| | - Balaji Deshmukh
- National Center for Cell Science
- NCCS Complex
- Pune University Campus
- Pune – 411 007
- India
| | - Varun Haran
- National Center for Cell Science
- NCCS Complex
- Pune University Campus
- Pune – 411 007
- India
| | - Sanjay Jha
- Gujarat Agricultural Biotechnology Institute
- Navsari Agricultural University
- Surat – 395007
- India
| | | | - Nibedita Lenka
- National Center for Cell Science
- NCCS Complex
- Pune University Campus
- Pune – 411 007
- India
| | - Suresh Kumar Kailasa
- Department of Applied Chemistry
- S. V. National Institute of Technology
- Surat – 395 007
- India
| | - Z. V. P. Murthy
- Chemical Engineering Department
- S. V. National Institute of Technology
- Surat – 395007
- India
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8
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Rapid colorimetric detection of mercury using biosynthesized gold nanoparticles. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.04.036] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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A highly sensitive and widely adaptable plasmonic aptasensor using berberine for small-molecule detection. Biosens Bioelectron 2017; 97:292-298. [PMID: 28618365 DOI: 10.1016/j.bios.2017.06.019] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 06/08/2017] [Accepted: 06/09/2017] [Indexed: 01/04/2023]
Abstract
Localized surface plasmon resonance (LSPR) biosensors allow label-free detection of small molecules in molecular binding events; however, they are limited by a relatively low sensitivity and narrow dynamic range. Here, we report highly sensitive small-molecule detection by LSPR peak shift exploiting the G-quadruplex (GQx) structure-binding characteristic of known GQx binders to enhance the LSPR signal of a plasmonic aptasensor. Six known GQx binders (thiazole orange, malachite green, crystal violet, zinc protoporphyrin IX, thioflavin T, and berberine) were tested for their ability to enhance the LSPR signal. Among these, berberine (BER) induced the largest LSPR peak shift by interacting with the GQx structure formed by the aptamer/target binding event on a gold nanorod surface. This specific binding performance was confirmed by the fluorescence signal of BER and through repeated cycles of BER addition and washing on the plasmonic sensing chip. The proposed plasmonic aptasensor respectively showed limit of detection (LOD) of 0.56, 0.63, 0.87 and 1.05 pM for ochratoxin A, aflatoxin B1, adenosine triphosphate and potassium ions, which was 1000-fold higher than that in BER-free condition, and a wide dynamic range from 10 pM to 10μM. In addition, the proposed LSPR aptasensor could effectively be used to quantitatively analyze small molecules in real samples.
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10
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Maddinedi SB, Mandal BK, Anna KK. Tyrosine assisted size controlled synthesis of silver nanoparticles and their catalytic, in-vitro cytotoxicity evaluation. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2017; 51:23-29. [PMID: 28262509 DOI: 10.1016/j.etap.2017.02.020] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 02/11/2017] [Accepted: 02/18/2017] [Indexed: 05/02/2023]
Abstract
A simple, green approach for the size controllable preparation of silver nanoparticles (SNPs) using tyrosine as reducing and capping agent is shown here. The size of SNPs is controlled by varying the pH of tyrosine solution. The as synthesized SNPs are characterized by using XRD, UV-Visible, DLS, TEM and SAED. Zeta potential measurements revealed the stability of tyrosine capped silver nanocolloids. Furthermore, catalytic activity studies concluded that the smaller SNPs acts as good catalyst and the catalytic activity depends on size of the nanoparticles. Further, the in-vitro cytotoxicity experiments concluded that the cytotoxicity of the prepared SNPs towards mouse fibroblast (3T3) cell lines is size and dose dependent. Additionally, the present approach is substitute to the traditional methods that are being used now-a-days for size controlled synthesis of SNPs.
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Affiliation(s)
- Sireesh Babu Maddinedi
- The Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, National Engineering Lab for Textile Fiber Materials and Processing Technology (Zhejiang), College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China; Trace Elements Speciation Research Laboratory, Environmental and Analytical Chemistry Division, School of Advanced Sciences, VIT University, Vellore 632014, India
| | - Badal Kumar Mandal
- Trace Elements Speciation Research Laboratory, Environmental and Analytical Chemistry Division, School of Advanced Sciences, VIT University, Vellore 632014, India.
| | - Kiran Kumar Anna
- Trace Elements Speciation Research Laboratory, Environmental and Analytical Chemistry Division, School of Advanced Sciences, VIT University, Vellore 632014, India
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11
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Zhang X, Qu Y, Shen W, You S, Pei X, Li S, Wang J, Zhou J. Colorimetric response of biogenetic gold nanoparticles to mercury (II) ions. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.08.072] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Gorbe M, Bhat R, Aznar E, Sancenón F, Marcos MD, Herraiz FJ, Prohens J, Venkataraman A, Martínez-Máñez R. Rapid Biosynthesis of Silver Nanoparticles Using Pepino (Solanum muricatum) Leaf Extract and Their Cytotoxicity on HeLa Cells. MATERIALS 2016; 9:ma9050325. [PMID: 28773448 PMCID: PMC5503040 DOI: 10.3390/ma9050325] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 04/21/2016] [Accepted: 04/25/2016] [Indexed: 11/16/2022]
Abstract
Within nanotechnology, gold and silver nanostructures have unique physical, chemical, and electronic properties [1,2], which make them suitable for a number of applications. Moreover, biosynthetic methods are considered to be a safer alternative to conventional physicochemical procedures for both the environmental and biomedical applications, due to their eco-friendly nature and the avoidance of toxic chemicals in the synthesis. For this reason, employing bio routes in the synthesis of functionalized silver nanoparticles (FAgNP) have gained importance recently in this field. In the present study, we report the rapid synthesis of FAgNP through the extract of pepino (Solanum muricatum) leaves and employing microwave oven irradiation. The core-shell globular morphology and characterization of the different shaped and sized FAgNP, with a core of 20-50 nm of diameter is established using the UV-Visible spectroscopy (UV-vis), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and Zeta potential and dynamic light scanning (DLS) studies. Moreover, cytotoxic studies employing HeLa (human cervix carcinoma) cells were undertaken to understand FAgNP interactions with cells. HeLa cells showed significant dose dependent antiproliferative activity in the presence of FAgNP at relatively low concentrations. The calculated IC50 value was 37.5 µg/mL, similar to others obtained for FAgNPs against HeLa cells.
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Affiliation(s)
- Mónica Gorbe
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universitat Politècnica de València-Universitat de València, Camino de Vera s/n, Valencia 46022, Spain.
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Valencia 46022, Spain.
| | - Ravishankar Bhat
- Materials Chemistry Laboratory, Department of Chemistry, Gulbarga University, Gulbarga, Karnataka 585106, India.
- Biological Research Innovation Centre and Solutions LLP, Bengaluru, Karnataka 56004, India.
| | - Elena Aznar
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universitat Politècnica de València-Universitat de València, Camino de Vera s/n, Valencia 46022, Spain.
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Valencia 46022, Spain.
| | - Félix Sancenón
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universitat Politècnica de València-Universitat de València, Camino de Vera s/n, Valencia 46022, Spain.
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Valencia 46022, Spain.
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, Valencia 46022, Spain.
| | - M Dolores Marcos
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universitat Politècnica de València-Universitat de València, Camino de Vera s/n, Valencia 46022, Spain.
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Valencia 46022, Spain.
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, Valencia 46022, Spain.
| | - F Javier Herraiz
- Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Universitat Politècnica de València, Camino de Vera 14, Valencia 46022, Spain.
| | - Jaime Prohens
- Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Universitat Politècnica de València, Camino de Vera 14, Valencia 46022, Spain.
| | - Abbaraju Venkataraman
- Materials Chemistry Laboratory, Department of Chemistry, Gulbarga University, Gulbarga, Karnataka 585106, India.
| | - Ramón Martínez-Máñez
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universitat Politècnica de València-Universitat de València, Camino de Vera s/n, Valencia 46022, Spain.
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Valencia 46022, Spain.
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, Valencia 46022, Spain.
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Rana D, Jamwal D, Katoch A, Thakur P, Kalia S. Eicosyl ammoniums elicited thermal reduction alleyway towards gold nanoparticles and their chemo-sensor aptitude. Analyst 2016; 141:2208-17. [PMID: 26841970 DOI: 10.1039/c5an02061a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The construction of dimethylenebis(eicosyldimethylammonium bromide) surfactant-directed gold nanoparticles (NPs) has been accomplished via a one-pot thermal reduction of HAuCl4 with trisodium citrate. The effect of cationic twin-tail surfactants, dimethylenebis(hexadecyldimethylammonium bromide) (16-2-16), dimethylenebis(octadecyldimethylammonium bromide) (18-2-18) and dimethylenebis(eicosyldimethylammonium bromide) (20-2-20), and their concentrations on shape and size of Au nanoparticles was thoroughly investigated. The UV-Vis spectroscopy and transmission electron microscopy (TEM) results show that longer tail length surfactants act as shape-directing agents promoting diversified morphologies. The formation of multiple-shaped Au nanoparticles, such as round, hexagonal, pentagonal, triangular and rod-like, has been confirmed from microstructure analysis; among them, many triangular shapes enhanced at elevated levels of surfactant concentration. In addition, the triangular Au nanoparticles with truncated corners were changed to smooth corners as the hydrocarbon chain length increased from (18-2-18) to (20-2-20). The concentration and hydrocarbon tails of twin-tail surfactants strongly influence the size and structure of Au NPs. In addition, the Au NPs synthesized with the twin-tail surfactant (18-2-18) were found to be highly sensitive towards Hg(2+), which could be because of the preferential adsorption of Hg(0) on the lower energy facets of triangular-shaped Au NPs.
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Affiliation(s)
- Dolly Rana
- School of Chemistry, Faculty of Basic Sciences, Shoolini University, Solan, HP-173212, India.
| | - Deepika Jamwal
- School of Chemistry, Faculty of Basic Sciences, Shoolini University, Solan, HP-173212, India.
| | - Akash Katoch
- Institute Instrumentation Centre, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Pankaj Thakur
- School of Chemistry, Faculty of Basic Sciences, Shoolini University, Solan, HP-173212, India. and Istituto Italiano Di Tecnologia (Centre for Advanced Biomaterials for Healthcare), Naples 80125, Italy
| | - Susheel Kalia
- Department of Chemistry, Army Cadet College Wing, Indian Military Academy, Dehradun 248007, UK, India
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14
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Kumar A, Dutta RK. CdS quantum dots immobilized on calcium alginate microbeads for rapid and selective detection of Hg2+ ions. RSC Adv 2015. [DOI: 10.1039/c5ra14638k] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Immobilized CdS QDs for selective detection and pre-concentration of Hg2+.
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Affiliation(s)
- Ambika Kumar
- Department of Chemistry
- Indian Institute of Technology Roorkee
- Roorkee – 247667
- India
| | - Raj Kumar Dutta
- Department of Chemistry
- Indian Institute of Technology Roorkee
- Roorkee – 247667
- India
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15
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A highly selective and femto-molar sensitive fluorescence ‘turn-on’ chemodosimeter for Hg2+. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.01.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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16
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Liu Y, Huang CZ. Real-time dark-field scattering microscopic monitoring of the in situ growth of single Ag@Hg nanoalloys. ACS NANO 2013; 7:11026-11034. [PMID: 24279755 DOI: 10.1021/nn404694e] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A comprehensive understanding of the growth mechanism of nanoalloys is beneficial in designing and synthesizing nanoalloys with precisely tailored properties to extend their applications. Herein, we present the investigation in this aspect by real-time monitoring of the in situ growth of single Ag@Hg nanoalloys, through direct amalgamation of Ag nanoparticles with elemental mercury, by dark-field scattering microscopy. Four typically shaped Ag nanoparticles, such as rods, triangular bipyramids, cubes, and spheres, were used as seeds for studying the growth of Ag@Hg nanoalloys. The scattered light of Ag nanoparticles of different shapes, on exposure to the growth solution, exhibited a noticeable blue-shift followed by a red-shift, suggesting the growth of Ag@Hg nanoalloys. The formation of Ag@Hg nanoalloys was confirmed by scanning electron microscopy, high-resolution transmit electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscopy, and elemental mapping and line scanning. Further analysis of the time-dependent spectral data and morphological change of single nanoparticles during the growth led to the visual identification of the growth mechanism of single Ag@Hg nanoalloys. Three important steps were involved: first, rapid adsorption of Hg atoms onto Ag nanoparticles; second, initial diffusion of Hg atoms into Ag nanoparticles, rounding or shortening the particles; third, further diffusion of Hg atoms leading to the formation of spherical Ag@Hg nanoalloys. On the basis of these results, Ag@Hg nanoalloys with given optical properties can be synthesized. Moreover, dark-field scattering microscopy is expected to be a powerful tool used for real-time monitoring of the in situ growth of other metal nanoparticles.
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Affiliation(s)
- Yue Liu
- Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, China
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17
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Hormozi-Nezhad MR, Karami P, Robatjazi H. A simple shape-controlled synthesis of gold nanoparticles using nonionic surfactants. RSC Adv 2013. [DOI: 10.1039/c3ra40280k] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Chou CW, Hsieh HH, Hseu YC, Chen KS, Wang GJ, Chang HC, Pan YL, Wei YS, Chang KH, Harn YW. Biopolymer coated gold nanocrystals prepared using the green chemistry approach and their shape-dependent catalytic and surface-enhanced Raman scattering properties. Phys Chem Chem Phys 2013; 15:11275-86. [DOI: 10.1039/c3cp50956g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Zhu X, Zhao Z, Chi X, Gao J. Facile, sensitive, and ratiometric detection of mercuric ions using GSH-capped semiconductor quantum dots. Analyst 2013; 138:3230-7. [DOI: 10.1039/c3an00011g] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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