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Kwon T, Mun HY, Seo S, Yu A, Lee C, Lee Y. Amperometric Sensing of Carbon Monoxide: Improved Sensitivity and Selectivity via Nanostructure-Controlled Electrodeposition of Gold. BIOSENSORS 2021; 11:334. [PMID: 34562925 PMCID: PMC8468895 DOI: 10.3390/bios11090334] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 09/09/2021] [Accepted: 09/10/2021] [Indexed: 01/04/2023]
Abstract
A series of gold (Au) nanostructures, having different morphologies, were fabricated for amperometric selective detection of carbon monoxide (CO), a biologically important signaling molecule. Au layers were electrodeposited from a precursor solution of 7 mM HAuCl4 with a constant deposition charge (0.04 C) at various deposition potentials. The obtained Au nanostructures became rougher and spikier as the deposition potential lowered from 0.45 V to 0.05 V (vs. Ag/AgCl). As prepared Au layers showed different hydrophobicity: The sharper morphology, the greater hydrophobicity. The Au deposit formed at 0.05 V had the sharpest shape and the greatest surface hydrophobicity. The sensitivity of an Au deposit for amperometric CO sensing was enhanced as the Au surface exhibits higher hydrophobicity. In fact, CO selectivity over common electroactive biological interferents (L-ascorbic acid, 4-acetamidophenol, 4-aminobutyric acid and nitrite) was improved eminently once the Au deposit became more hydrophobic. The most hydrophobic Au was also confirmed to sense CO exclusively without responding to nitric oxide, another similar gas signaling molecule, in contrast to a hydrophobic platinum (Pt) counterpart. This study presents a feasible strategy to enhance the sensitivity and selectivity for amperometric CO sensing via the fine control of Au electrode nanostructures.
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Affiliation(s)
| | | | | | | | | | - Youngmi Lee
- Department of Chemistry & Nanoscience, Ewha Womans University, Seoul 03760, Korea; (T.K.); (H.Y.M.); (S.S.); (A.Y.); (C.L.)
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2
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In situ/operando vibrational spectroscopy for the investigation of advanced nanostructured electrocatalysts. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213824] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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3
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Saraeva I, Kudryashov SI, Danilov P, Busleev N, Tolordava ER, Rudenko AA, Zayarny D, Ionin A, Romanova YM. Polarization-Sensitive Surface-Enhanced In Situ Photoluminescence Spectroscopy of S. aureus Bacteria on Gold Nanospikes. SENSORS (BASEL, SWITZERLAND) 2020; 20:E2466. [PMID: 32349257 PMCID: PMC7250023 DOI: 10.3390/s20092466] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 04/19/2020] [Accepted: 04/23/2020] [Indexed: 11/16/2022]
Abstract
We report the possibility of a time-resolved bacterial live/dead dynamics observation with the use of plasmonic nanospikes. Sharp nanospikes, fabricated on a 500-nm thick gold film by laser ablation with the use of 1030-nm femtosecond pulses, were tested as potential elements for antibacterial surfaces and plasmonic luminescence sensors. Staphylococcus aureus bacteria were stained by a live/dead viability kit, with the dead microorganisms acquiring the red colour, caused by the penetration of the luminescent dye propidium iodide through the damaged cell membrane. Photoluminescence was pumped by 515-nm femtosecond laser pulses with linear (Gaussian beam), circular, azimuthal and radial (Laguerre-Gaussian beam) polarizations, exciting the transverse plasmon resonance of the nanospikes and their apex lightning-rod near-field. According to the numerical electrodynamic modeling, the observed strong increase in the photoluminescence yield for radial polarization, while slightly lower for circular and azimuthal polarizations, compared with the low luminescence intensities for the linear laser polarization, was related to their different laser-nanospike coupling efficiencies.
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Affiliation(s)
- Irina Saraeva
- P. N. Lebedev Physics Institute of Russian Academy of Sciences, Leninskiy Prospect 53, 119991 Moscow, Russia; (S.I.K.); (P.D.); (N.B.); (E.R.T.); (A.A.R.); (D.Z.); (A.I.)
| | - Sergey I. Kudryashov
- P. N. Lebedev Physics Institute of Russian Academy of Sciences, Leninskiy Prospect 53, 119991 Moscow, Russia; (S.I.K.); (P.D.); (N.B.); (E.R.T.); (A.A.R.); (D.Z.); (A.I.)
- Faculty of Photonics, ITMO University, Kronverkskiy Prospect 49, 197101 Saint-Petersburg, Russia
| | - Pavel Danilov
- P. N. Lebedev Physics Institute of Russian Academy of Sciences, Leninskiy Prospect 53, 119991 Moscow, Russia; (S.I.K.); (P.D.); (N.B.); (E.R.T.); (A.A.R.); (D.Z.); (A.I.)
| | - Nikolay Busleev
- P. N. Lebedev Physics Institute of Russian Academy of Sciences, Leninskiy Prospect 53, 119991 Moscow, Russia; (S.I.K.); (P.D.); (N.B.); (E.R.T.); (A.A.R.); (D.Z.); (A.I.)
| | - Eteri R. Tolordava
- P. N. Lebedev Physics Institute of Russian Academy of Sciences, Leninskiy Prospect 53, 119991 Moscow, Russia; (S.I.K.); (P.D.); (N.B.); (E.R.T.); (A.A.R.); (D.Z.); (A.I.)
- N.F. Gamaleya Federal Research Centre of Epidemiology and Microbiology, Gamalei Street 18, 123098 Moscow, Russia;
| | - Andrey A. Rudenko
- P. N. Lebedev Physics Institute of Russian Academy of Sciences, Leninskiy Prospect 53, 119991 Moscow, Russia; (S.I.K.); (P.D.); (N.B.); (E.R.T.); (A.A.R.); (D.Z.); (A.I.)
| | - Dmitriy Zayarny
- P. N. Lebedev Physics Institute of Russian Academy of Sciences, Leninskiy Prospect 53, 119991 Moscow, Russia; (S.I.K.); (P.D.); (N.B.); (E.R.T.); (A.A.R.); (D.Z.); (A.I.)
| | - Andrey Ionin
- P. N. Lebedev Physics Institute of Russian Academy of Sciences, Leninskiy Prospect 53, 119991 Moscow, Russia; (S.I.K.); (P.D.); (N.B.); (E.R.T.); (A.A.R.); (D.Z.); (A.I.)
| | - Yulia M. Romanova
- N.F. Gamaleya Federal Research Centre of Epidemiology and Microbiology, Gamalei Street 18, 123098 Moscow, Russia;
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Lu S, You T, Yang N, Gao Y, Yin P. Flexible SERS substrate based on Ag nanodendrite-coated carbon fiber cloth: simultaneous detection for multiple pesticides in liquid droplet. Anal Bioanal Chem 2019; 412:1159-1167. [PMID: 31872273 DOI: 10.1007/s00216-019-02344-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 12/09/2019] [Indexed: 02/06/2023]
Abstract
We report a method for preparing flexible substrates based on 3D Ag nanodendrites (Ag NDs)/carbon fiber cloth substrate with superhydrophobic surface. Ag NDs were deposited on carbon fiber cloth by electrochemical deposition, and the superhydrophobicity of the surface was achieved by low surface energy modification. The cylinder shape of the carbon fiber provides a three-dimensional structure for Ag NDs, increasing the "hot spot" effect, and is the excellent choice as SERS substrate. At the same time, micro/nanostructures provided by fibers and nanodendrites can easily obtain ultra-wet surfaces. The analyte solution can be directly detected in a droplet onto the superhydrophobic surface without pretreatment, which greatly shortens the detection time. The lowest concentration of crystal violet (CV) that can be detected is 10-10 M, demonstrating good SERS sensitivity of the prepared substrate. It was successfully applied in simultaneous detection of at least three molecules. Thiram and malachite green (MG) can be detected simultaneously in real lake water. Moreover, the conductivity, physical flexibility, and stability of the flexible carbon fiber cloth gives this substrate potential in other fields such as electrochemistry. Graphical abstract Flexible SERS substrate based on Ag nanodendrite-coated carbon fiber cloth: simultaneous detection for multiple pesticides in liquid droplet.
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Affiliation(s)
- Sichen Lu
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191, China
| | - Tingting You
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191, China
| | - Nan Yang
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191, China
| | - Yukun Gao
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191, China.
| | - Penggang Yin
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing, 100191, China
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Xiang X, Feng S, Chen J, Feng J, Hou Y, Ruan Y, Weng X, Milcovich G. Gold nanoparticles/electrochemically expanded graphite composite: A bifunctional platform toward glucose sensing and SERS applications. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.113471] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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6
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Ranjan Sarker S, Polash SA, Boath J, Kandjani AE, Poddar A, Dekiwadia C, Shukla R, Sabri Y, Bhargava SK. Functionalization of Elongated Tetrahexahedral Au Nanoparticles and Their Antimicrobial Activity Assay. ACS APPLIED MATERIALS & INTERFACES 2019; 11:13450-13459. [PMID: 30869505 DOI: 10.1021/acsami.9b02279] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Gold nanoparticles are inert for the human body, and therefore, they have been functionalized to provide them with antibacterial properties. Here, elongated tetrahexahedral (ETHH) Au nanoparticles were synthesized, characterized, and functionalized with lipoic acid (LA), a natural antioxidant with a terminal carboxylic acid and a dithiolane ring, to generate ETHH-LA Au nanoparticles. The antioxidant activity of Au nanoparticles was investigated in vitro, showing that LA enhances the 2,2-diphenyl-1-picrylhydrazyl free-radical scavenging and Fe3+ ion reducing activity of ETHH-LA at higher amounts. The antimicrobial propensities of the nanoparticles were investigated against Gram-positive ( Bacillus subtilis) and Gram-negative ( Escherichia coli) bacteria through propidium iodide assay as well as disk diffusion assay. ETHH-LA Au nanoparticles showed significantly higher antimicrobial activity against B. subtilis compared with E. coli. Furthermore, ETHH-LA Au nanoparticles also showed significantly better antimicrobial activity against both bacterial strains when compared with ETHH. ETHH Au nanoparticles also bring about the oxidation of bacterial cell membrane fatty acids and produce lipid peroxides. ETHH-LA showed higher lipid peroxidation potential than that of ETHH against both bacteria tested. The hemolytic potential of Au nanoparticles was investigated using human red blood cells and ETHH-LA showed reduced hemolytic activity than that of ETHH. The cytotoxicity of Au nanoparticles was investigated using human cervical cancer cells, HeLa, and ETHH-LA Au nanoparticles showed reduced cytotoxicity than that of ETHH. Taken together, LA enhances the antimicrobial activity of ETHH Au nanoparticles and Au nanoparticles interact with the bacteria through electrostatic interactions as well as hydrophobic interactions and damage the bacterial cell wall followed by oxidation of cell membrane fatty acids.
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Affiliation(s)
- Satya Ranjan Sarker
- Department of Biotechnology and Genetic Engineering , Jahangirnagar University , Savar , Dhaka 1342 , Bangladesh
| | - Shakil Ahmed Polash
- Department of Biotechnology and Genetic Engineering , Jahangirnagar University , Savar , Dhaka 1342 , Bangladesh
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7
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Elbourne A, Coyle VE, Truong VK, Sabri YM, Kandjani AE, Bhargava SK, Ivanova EP, Crawford RJ. Multi-directional electrodeposited gold nanospikes for antibacterial surface applications. NANOSCALE ADVANCES 2019; 1:203-212. [PMID: 36132449 PMCID: PMC9473181 DOI: 10.1039/c8na00124c] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 08/08/2018] [Indexed: 05/14/2023]
Abstract
The incorporation of high-aspect-ratio nanostructures across surfaces has been widely reported to impart antibacterial characteristics to a substratum. This occurs because the presence of such nanostructures can induce the mechanical rupture of attaching bacteria, causing cell death. As such, the development of high-efficacy antibacterial nano-architectures fabricated on a variety of biologically relevant materials is critical to the wider acceptance of this technology. In this study, we report the antibacterial behavior of a series of substrata containing multi-directional electrodeposited gold (Au) nanospikes, as both a function of deposition time and precursor concentration. Firstly, the bactericidal efficacy of substrata containing Au nanospikes was assessed as a function of deposition time to elucidate the nanopattern that exhibited the greatest degree of biocidal activity. Here, it was established that multi-directional nanospikes with an average height of ∼302 nm ± 57 nm (formed after a deposition time of 540 s) exhibited the greatest level of biocidal activity, with ∼88% ± 8% of the bacterial cells being inactivated. The deposition time was then kept constant, while the concentration of the HAuCl4 and Pb(CH3COO)2 precursor materials (used for the formation of the Au nanospikes) was varied, resulting in differing nanospike architectures. Altering the Pb(CH3COO)2 precursor concentration produced multi-directional nanostructures with a wider distribution of heights, which increased the average antibacterial efficacy against both Gram-negative Pseudomonas aeruginosa and Gram-positive Staphylococcus aureus bacteria. Importantly, the in situ electrochemical fabrication method used in this work is robust and straightforward, and is able to produce highly reproducible antibacterial surfaces. The results of this research will assist in the wider utilization of mechano-responsive nano-architectures for antimicrobial surface technologies.
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Affiliation(s)
- Aaron Elbourne
- School of Science, College of Science, Engineering and Health, RMIT University Melbourne VIC 3001 Australia
| | - Victoria E Coyle
- Centre for Advanced Materials and Industrial Chemistry (CAMIC), School of Science, College of Science, Engineering and Health, RMIT University Melbourne VIC 3001 Australia
| | - Vi Khanh Truong
- School of Science, Faculty of Science, Engineering and Technology, Swinburne University of Technology Haw-thorn VIC 3122 Australia
- ARC Research Hub for Australian Steel Manufacturing Wollongong New South Wales Australia
| | - Ylias M Sabri
- Centre for Advanced Materials and Industrial Chemistry (CAMIC), School of Science, College of Science, Engineering and Health, RMIT University Melbourne VIC 3001 Australia
| | - Ahmad E Kandjani
- Centre for Advanced Materials and Industrial Chemistry (CAMIC), School of Science, College of Science, Engineering and Health, RMIT University Melbourne VIC 3001 Australia
| | - Suresh K Bhargava
- Centre for Advanced Materials and Industrial Chemistry (CAMIC), School of Science, College of Science, Engineering and Health, RMIT University Melbourne VIC 3001 Australia
| | - Elena P Ivanova
- School of Science, College of Science, Engineering and Health, RMIT University Melbourne VIC 3001 Australia
| | - Russell J Crawford
- School of Science, College of Science, Engineering and Health, RMIT University Melbourne VIC 3001 Australia
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Jampaiah D, Damma D, Chalkidis A, Singh M, Sabri YM, Mayes ELH, Bansal V, Bhargava SK. MOF-derived noble-metal-free Cu/CeO2 with high porosity for the efficient water–gas shift reaction at low temperatures. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01114e] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A metal organic framework templated Cu/CeO2 catalyst exhibited enhanced catalytic performance for the water–gas shift reaction at low temperatures.
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Affiliation(s)
- Deshetti Jampaiah
- Centre for Advanced Materials and Industrial Chemistry (CAMIC)
- School of Science
- RMIT University
- Melbourne
- Australia
| | - Devaiah Damma
- Chemical Engineering
- College of Engineering and Applied Science
- University of Cincinnati
- Cincinnati
- USA
| | - Anastasios Chalkidis
- Centre for Advanced Materials and Industrial Chemistry (CAMIC)
- School of Science
- RMIT University
- Melbourne
- Australia
| | - Mandeep Singh
- Ian Potter NanoBioSensing Facility
- NanoBiotechnology Research Laboratory
- School of Science
- RMIT University
- Melbourne
| | - Ylias M. Sabri
- Centre for Advanced Materials and Industrial Chemistry (CAMIC)
- School of Science
- RMIT University
- Melbourne
- Australia
| | - Edwin L. H. Mayes
- RMIT Microscopy and Microanalysis Facility
- School of Science
- RMIT University
- Melbourne
- Australia
| | - Vipul Bansal
- Ian Potter NanoBioSensing Facility
- NanoBiotechnology Research Laboratory
- School of Science
- RMIT University
- Melbourne
| | - Suresh K. Bhargava
- Centre for Advanced Materials and Industrial Chemistry (CAMIC)
- School of Science
- RMIT University
- Melbourne
- Australia
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9
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Xi Y, Li Y, Duan Z, Lu Y. A Novel Pre-Processing Algorithm Based on the Wavelet Transform for Raman Spectrum. APPLIED SPECTROSCOPY 2018; 72:1752-1763. [PMID: 29972318 DOI: 10.1177/0003702818789695] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Noise and fluorescent background are two major problems for acquiring Raman spectra from samples, which blur Raman spectra and make Raman detection or imaging difficult. In this paper, a novel algorithm based on wavelet transform that contains denoising and baseline correction is presented to automatically extract Raman signals. For the denoising section, the improved conventional-scale correlation denoising method is proposed. The baseline correction section, which is performed after denoising, basically consists of five aspects: (1) detection of the peak position; (2) approximate second derivative calculation based on continuous wavelet transform is performed using the Haar wavelet function to find peaks and background areas; (3) the threshold is estimated from the peak intensive area for identification of peaks; (4) correction of endpoints, spectral peaks, and peak position; and (5) determine the endpoints of the peak after subtracting the background. We tested this algorithm for simulated and experimental Raman spectra, and a satisfactory denoising effect and a good capability to correct background are observed. It is noteworthy that this algorithm requires few human interventions, which enables automatic denoising and background removal.
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Affiliation(s)
- Yang Xi
- School of Information Science & Engineering, Lanzhou University, China
| | - Yuee Li
- School of Information Science & Engineering, Lanzhou University, China
| | - Zhizhen Duan
- School of Information Science & Engineering, Lanzhou University, China
| | - Yang Lu
- School of Information Science & Engineering, Lanzhou University, China
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10
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Escalona-Villalpando R, Gurrola M, Trejo G, Guerra-Balcázar M, Ledesma-García J, Arriaga L. Electrodeposition of gold on oxidized and reduced graphite surfaces and its influence on glucose oxidation. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.03.037] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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11
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Galvanic-Cell-Reaction-Driven Deposition of Large-Area Au Nanourchin Arrays for Surface-Enhanced Raman Scattering. NANOMATERIALS 2018; 8:nano8040265. [PMID: 29690589 PMCID: PMC5923595 DOI: 10.3390/nano8040265] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 04/10/2018] [Accepted: 04/18/2018] [Indexed: 11/16/2022]
Abstract
Here we report a low-cost synthetic approach for the direct fabrication of large-area Au nanourchin arrays on indium tin oxide (ITO) via a facile galvanic-cell-reaction-driven deposition in an aqueous solution of chloroauric acid and poly(vinyl pyrrolidone) (PVP). The homogeneous Au nanourchins are composed of abundant sharp nanotips, which can served as nanoantennas and increase the local electromagnetic field enhancement dramatically. Finite element theoretical calculations confirm the strong electromagnetic field can be created around the sharp nanotips and located in the nanogaps between adjacent tips of the Au nanourchins. In addition, the interparticle nanogaps between the neighboring Au nanourchins may create additional hotspots, which can induce the higher electromagnetic field intensity. By using rhodamine 6G as a test molecule, the large-area Au nanourchin arrays on ITO exhibit active, uniform, and reproducible surface-enhanced Raman scattering (SERS) effect. To trial their practical application, the Au nanourchin arrays are utilized as SERS substrates to detect 3,3’,4,4’-tetrachlorobiphenyl (PCB-77) one congener of polychlorinated biphenyls (PCBs) as a notorious class of persistent organic pollutants. The characteristic Raman peaks can be still identified when the concentration of PCB-77 is down to 5 × 10−6 M.
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12
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Cevallos-Morillo CA, Hernández-Vargas SG, Aguilar-Cordero JC. Electrochemical Formation of Nanostructured Gold Surfaces on Glassy Carbon for the Determination of Dopamine. ELECTROANAL 2018. [DOI: 10.1002/elan.201700665] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Carlos Alberto Cevallos-Morillo
- Departamento de Química Analítica, Facultad de Química; Universidad Nacional Autónoma de México; Ciudad de México, C.P. 04510 México
| | - Salvador G. Hernández-Vargas
- Departamento de Química Analítica, Facultad de Química; Universidad Nacional Autónoma de México; Ciudad de México, C.P. 04510 México
| | - Julio C. Aguilar-Cordero
- Departamento de Química Analítica, Facultad de Química; Universidad Nacional Autónoma de México; Ciudad de México, C.P. 04510 México
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Salvadori MR, Ando RA, Nascimento CAO, Corrêa B. Dead biomass of Amazon yeast: A new insight into bioremediation and recovery of silver by intracellular synthesis of nanoparticles. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2017; 52:1112-1120. [PMID: 28763240 DOI: 10.1080/10934529.2017.1340754] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This investigation was undertaken to describe a natural process for the removal of silver and the simultaneous recovery of Ag/Ag2O nanoparticles by dead biomass of the yeast Rhodotorula mucilaginosa. The removal of silver ions from aqueous solution and the synthesis of Ag/Ag2O nanoparticles were analyzed based on physicochemical factors and equilibrium concentration, combined with transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and infrared spectroscopy (FTIR). A successful process for the synthesis of Ag/Ag2O nanoparticles was obtained, following the Langmuir isotherm model, showing a high biosorption capacity of silver (49.0 mg g-1). The nanoparticles were spherical, had an average size of 11.0 nm, were synthesized intracellularly and capped by yeast proteins. This sustainable protocol is an attractive platform for the industrial-scale production of silver nanoparticles and of a silver nanobiosorbent.
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Affiliation(s)
- Marcia R Salvadori
- a Department of Microbiology , Biomedical Institute II, University of São Paulo , São Paulo , Brazil
| | - Rômulo A Ando
- b Department of Fundamental Chemistry , Institute of Chemistry, University of São Paulo , São Paulo , Brazil
| | | | - Benedito Corrêa
- a Department of Microbiology , Biomedical Institute II, University of São Paulo , São Paulo , Brazil
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Lertanantawong B, Hoshyargar F, O'Mullane AP. Directing Nanostructure Formation of Gold through the In Situ Underpotential Deposition of a Secondary Metal for the Detection of Nitrite Ions. ChemElectroChem 2017. [DOI: 10.1002/celc.201700707] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Benchaporn Lertanantawong
- Nanoscience and Nanotechnology Graduate Program King Mongkut's University of Technology Thonburi (KMUTT) 126 Pracha Uthit Rd. Bangmod, Tungkru, Bangkok 10140 Thailand
| | - Faegheh Hoshyargar
- School of Chemistry, Physics and Mechanical Engineering Queensland University of Technology (QUT) GPO Box 2434 Brisbane, QLD 4001 Australia
| | - Anthony P. O'Mullane
- School of Chemistry, Physics and Mechanical Engineering Queensland University of Technology (QUT) GPO Box 2434 Brisbane, QLD 4001 Australia
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15
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Kim D, Kim J. Effect of Anionic Electrolytes and Precursor Concentrations on the Electrodeposited Pt Structures. ELECTROANAL 2017. [DOI: 10.1002/elan.201600346] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Dajeong Kim
- Department of Chemistry; Chungbuk National University; Cheongju Chungbuk 28644 Korea
| | - Jongwon Kim
- Department of Chemistry; Chungbuk National University; Cheongju Chungbuk 28644 Korea
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16
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Emerging applications of metal-TCNQ based organic semiconductor charge transfer complexes for catalysis. Catal Today 2016. [DOI: 10.1016/j.cattod.2015.11.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Lertanantawong B, Surareungchai W, O'Mullane AP. Utilising solution dispersed platinum nanoparticles to direct the growth of electrodeposited platinum nanostructures and its influence on the electrocatalytic oxidation of small organic molecules. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.04.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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18
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Hoshyargar F, Crawford J, O'Mullane AP. Galvanic Replacement of the Liquid Metal Galinstan. J Am Chem Soc 2016; 139:1464-1471. [PMID: 27626629 DOI: 10.1021/jacs.6b05957] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The galvanic replacement reaction is a highly versatile approach for the creation of a variety of nanostructured materials. However, the majority of reports are limited to the replacement of metallic nanoparticles or metal surfaces. Here we extend this elegant approach and describe the galvanic replacement of the liquid metal alloy galinstan with Ag and Au. This is achieved at a macrosized droplet to create a liquid metal marble that comprises a liquid metal core and a solid metal shell, whereby the morphology of the outer shell is determined by the concentration of metallic ions used in the solution during the galvanic replacement process. In principle, this allows one to recover precious metal ions from solution in their metallic form, which are immobilized on the liquid metal and therefore easy to recover. The reaction is also undertaken at liquid metal microdroplets created via sonication to produce Ag- and Au-based galinstan nanorice particles. These materials are characterized with SEM, XRD, TEM, SAED, EDX, XPS, UV-visible spectroscopy, and open-circuit potential versus time experiments to understand the galvanic replacement process. Finally, the nanosized materials are investigated for their catalytic activity toward the reduction of methylene blue in the presence of sodium borohydride. This approach illustrates a new avenue of research for the galvanic replacement process and, in principle, could be applied to many more systems.
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Affiliation(s)
- Faegheh Hoshyargar
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT) , Brisbane, QLD 4001, Australia
| | - Jessica Crawford
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT) , Brisbane, QLD 4001, Australia
| | - Anthony P O'Mullane
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT) , Brisbane, QLD 4001, Australia
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19
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Coyle VE, Kandjani AE, Sabri YM, Bhargava SK. Au Nanospikes as a Non-enzymatic Glucose Sensor: Exploring Morphological Changes with the Elaborated Chronoamperometric Method. ELECTROANAL 2016. [DOI: 10.1002/elan.201600138] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Victoria E. Coyle
- Centre for Advanced Materials and Industrial Chemistry (CAMIC), School of Science; RMIT University; GPO Box 2476 V Melbourne Victoria 3001 Australia
| | - Ahmad Esmaielzadeh Kandjani
- Centre for Advanced Materials and Industrial Chemistry (CAMIC), School of Science; RMIT University; GPO Box 2476 V Melbourne Victoria 3001 Australia
| | - Ylias M. Sabri
- Centre for Advanced Materials and Industrial Chemistry (CAMIC), School of Science; RMIT University; GPO Box 2476 V Melbourne Victoria 3001 Australia
| | - Suresh K. Bhargava
- Centre for Advanced Materials and Industrial Chemistry (CAMIC), School of Science; RMIT University; GPO Box 2476 V Melbourne Victoria 3001 Australia
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20
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Khalil I, Julkapli NM, Yehye WA, Basirun WJ, Bhargava SK. Graphene-Gold Nanoparticles Hybrid-Synthesis, Functionalization, and Application in a Electrochemical and Surface-Enhanced Raman Scattering Biosensor. MATERIALS (BASEL, SWITZERLAND) 2016; 9:E406. [PMID: 28773528 PMCID: PMC5456764 DOI: 10.3390/ma9060406] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 05/13/2016] [Accepted: 05/17/2016] [Indexed: 12/12/2022]
Abstract
Graphene is a single-atom-thick two-dimensional carbon nanosheet with outstanding chemical, electrical, material, optical, and physical properties due to its large surface area, high electron mobility, thermal conductivity, and stability. These extraordinary features of graphene make it a key component for different applications in the biosensing and imaging arena. However, the use of graphene alone is correlated with certain limitations, such as irreversible self-agglomerations, less colloidal stability, poor reliability/repeatability, and non-specificity. The addition of gold nanostructures (AuNS) with graphene produces the graphene-AuNS hybrid nanocomposite which minimizes the limitations as well as providing additional synergistic properties, that is, higher effective surface area, catalytic activity, electrical conductivity, water solubility, and biocompatibility. This review focuses on the fundamental features of graphene, the multidimensional synthesis, and multipurpose applications of graphene-Au nanocomposites. The paper highlights the graphene-gold nanoparticle (AuNP) as the platform substrate for the fabrication of electrochemical and surface-enhanced Raman scattering (SERS)-based biosensors in diverse applications as well as SERS-directed bio-imaging, which is considered as an emerging sector for monitoring stem cell differentiation, and detection and treatment of cancer.
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Affiliation(s)
- Ibrahim Khalil
- Institute of Postgraduate Studies Building, Nanotechnology & Catalysis Research Centre (NANOCAT), University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Nurhidayatullaili Muhd Julkapli
- Institute of Postgraduate Studies Building, Nanotechnology & Catalysis Research Centre (NANOCAT), University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Wageeh A Yehye
- Institute of Postgraduate Studies Building, Nanotechnology & Catalysis Research Centre (NANOCAT), University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Wan Jefrey Basirun
- Institute of Postgraduate Studies, Department of Chemistry, University of Malaya, Kuala Lumpur 50603, Malaysia.
- Nanotechnology & Catalysis Research Centre, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Suresh K Bhargava
- Centre for Advanced Materials & Industrial Chemistry (CAMIC), School of Applied Sciences, RMIT University, GPO Box 2476, Melbourne 3001, Australia.
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21
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Ordered Monolayer Gold Nano-urchin Structures and Their Size Induced Control for High Gas Sensing Performance. Sci Rep 2016; 6:24625. [PMID: 27090570 PMCID: PMC4835752 DOI: 10.1038/srep24625] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 03/31/2016] [Indexed: 11/09/2022] Open
Abstract
The synthesis of ordered monolayers of gold nano-urchin (Au-NU) nanostructures with controlled size, directly on thin films using a simple electrochemical method is reported in this study. In order to demonstrate one of the vast potential applications, the developed Au-NUs were formed on the electrodes of transducers (QCM) to selectively detect low concentrations of elemental mercury (Hg(0)) vapor. It was found that the sensitivity and selectivity of the sensor device is enhanced by increasing the size of the nanospikes on the Au-NUs. The Au-NU-12 min QCM (Au-NUs with nanospikes grown on it for a period of 12 min) had the best performance in terms of transducer based Hg(0) vapor detection. The sensor had 98% accuracy, 92% recovery, 96% precision (repeatability) and significantly, showed the highest sensitivity reported to date, resulting in a limit of detection (LoD) of only 32 μg/m3 at 75 °C. When compared to the control counterpart, the accuracy and sensitivity of the Au-NU-12 min was enhanced by ~2 and ~5 times, respectively. The results demonstrate the excellent activity of the developed materials which can be applied to a range of applications due to their long range order, tunable size and ability to form directly on thin-films.
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22
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Jeong H, Kim J. Electrodeposition of nanoflake Pd structures: structure-dependent wettability and SERS activity. ACS APPLIED MATERIALS & INTERFACES 2015; 7:7129-7135. [PMID: 25790169 DOI: 10.1021/acsami.5b02113] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The characteristic properties of metal surfaces, i.e., wettability and surface-enhanced Raman scattering (SERS) activity, have been the subject of intensive research because of their useful applications. In the present work, we report a simple electrodeposition of nanoflake Pd structures onto clean Au surfaces without the use of additives. The fine structure of the nanoflake Pd surfaces was regulated by controlling the deposition charge, and the effect of the structural variations on the wettability and SERS activity was examined. The wettability of nanoflake Pd structures in terms of water contact angle was closely related to the fine structures of Pd deposits and their surface roughness. The SERS activity of the nanoflake Pd surfaces was highly dependent on the presence of sharp edge sites on the Pd structures. Well-defined nanoflake Pd structures prepared using a deposition charge of 0.04 C exhibited superhydrophobic natures and reproducible SERS activity. The effect of the metal surface structures on the wettability and the SERS activity demonstrated in this work provides insight into the fabrication of functional metal nanostructures.
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Affiliation(s)
- Hwakyeung Jeong
- Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763, Korea
| | - Jongwon Kim
- Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763, Korea
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23
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Preparation of Au nanosheets supported on Ni foam and its electrocatalytic performance towards NaBH4 oxidation. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.01.171] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Xu J, Wang C, Liu J, Xu S, Zhang W, Lu Y. Facile fabrication of a novel nanoporous Au/AgO composite for electrochemical double-layer capacitor. RSC Adv 2015. [DOI: 10.1039/c5ra03564c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this work, a novel nanoporous gold/silver oxide (NP Au/AgO) composite (NPAAC) was fabricated by a simple two-step partial dealloying–stripping process for supercapacitor applications.
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Affiliation(s)
- Junling Xu
- Department of Mechanical and Biomedical Engineering
- City University of Hong Kong
- Hong Kong
- China
- Center of Super-Diamond and Advanced Films (COSDAF)
| | - Chundong Wang
- Center of Super-Diamond and Advanced Films (COSDAF)
- City University of Hong Kong
- Hong Kong
- China
- Department of Physics and Materials Science
| | - Jiabin Liu
- Department of Mechanical and Biomedical Engineering
- City University of Hong Kong
- Hong Kong
- China
| | - Shang Xu
- Department of Mechanical and Biomedical Engineering
- City University of Hong Kong
- Hong Kong
- China
- Center of Super-Diamond and Advanced Films (COSDAF)
| | - Wenjun Zhang
- Center of Super-Diamond and Advanced Films (COSDAF)
- City University of Hong Kong
- Hong Kong
- China
- Department of Physics and Materials Science
| | - Yang Lu
- Department of Mechanical and Biomedical Engineering
- City University of Hong Kong
- Hong Kong
- China
- Center of Super-Diamond and Advanced Films (COSDAF)
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25
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Sebastian V, Lee SK, Jensen KF. Engineering the synthesis of silica-gold nano-urchin particles using continuous synthesis. NANOSCALE 2014; 6:13228-13235. [PMID: 25259506 DOI: 10.1039/c4nr04021j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Compared to freestanding nanoparticles, supported nanostructures typically show better mechanical stability as well as ease of handling. Unique shapes such as core-shells, raspberries and crescents have been developed on supported materials to gain improved chemical and optical properties along with versatility and tunability. We report the formation of hyper-branched gold structures on silica particles, silica-gold nano-urchin (SGNU) particles. Kinetic control of crystallization, fast mass transfer as well as a bumped surface morphology of the silica particles are important factors for the growth of gold branches on the silica support. Using a microfluidic platform, continuous synthesis of SGNUs is achieved with increased reaction rate (less than 12 min of residence time), better controllability and reproducibility than that obtained in batch synthesis. The hyper-branched gold structures display surface-enhanced Raman scattering (SERS).
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Affiliation(s)
- Víctor Sebastian
- Department of Chemical Engineering. Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA.
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26
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Sabri YM, Ippolito SJ, Tardio J, Bansal V, O'Mullane AP, Bhargava SK. Gold nanospikes based microsensor as a highly accurate mercury emission monitoring system. Sci Rep 2014; 4:6741. [PMID: 25338965 PMCID: PMC4206864 DOI: 10.1038/srep06741] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 10/06/2014] [Indexed: 11/09/2022] Open
Abstract
Anthropogenic elemental mercury (Hg(0)) emission is a serious worldwide environmental problem due to the extreme toxicity of the heavy metal to humans, plants and wildlife. Development of an accurate and cheap microsensor based online monitoring system which can be integrated as part of Hg(0) removal and control processes in industry is still a major challenge. Here, we demonstrate that forming Au nanospike structures directly onto the electrodes of a quartz crystal microbalance (QCM) using a novel electrochemical route results in a self-regenerating, highly robust, stable, sensitive and selective Hg(0) vapor sensor. The data from a 127 day continuous test performed in the presence of volatile organic compounds and high humidity levels, showed that the sensor with an electrodeposted sensitive layer had 260% higher response magnitude, 3.4 times lower detection limit (~22 μg/m(3) or ~2.46 ppb(v)) and higher accuracy (98% Vs 35%) over a Au control based QCM (unmodified) when exposed to a Hg(0) vapor concentration of 10.55 mg/m(3) at 101°C. Statistical analysis of the long term data showed that the nano-engineered Hg(0) sorption sites on the developed Au nanospikes sensitive layer play a critical role in the enhanced sensitivity and selectivity of the developed sensor towards Hg(0) vapor.
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Affiliation(s)
- Ylias M Sabri
- Centre for Advanced Materials and Industrial Chemistry, School of Applied Sciences, RMIT University, GPO Box 2476V, Melbourne, VIC, Australia, 3001
| | - Samuel J Ippolito
- Centre for Advanced Materials and Industrial Chemistry, School of Applied Sciences, RMIT University, GPO Box 2476V, Melbourne, VIC, Australia, 3001
| | - James Tardio
- Centre for Advanced Materials and Industrial Chemistry, School of Applied Sciences, RMIT University, GPO Box 2476V, Melbourne, VIC, Australia, 3001
| | - Vipul Bansal
- Centre for Advanced Materials and Industrial Chemistry, School of Applied Sciences, RMIT University, GPO Box 2476V, Melbourne, VIC, Australia, 3001
| | - Anthony P O'Mullane
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, GPO Box 2434, Brisbane, Australia
| | - Suresh K Bhargava
- Centre for Advanced Materials and Industrial Chemistry, School of Applied Sciences, RMIT University, GPO Box 2476V, Melbourne, VIC, Australia, 3001
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27
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Kandjani AE, Mohammadtaheri M, Thakkar A, Bhargava SK, Bansal V. Zinc oxide/silver nanoarrays as reusable SERS substrates with controllable 'hot-spots' for highly reproducible molecular sensing. J Colloid Interface Sci 2014; 436:251-7. [PMID: 25278363 DOI: 10.1016/j.jcis.2014.09.017] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 09/08/2014] [Accepted: 09/09/2014] [Indexed: 11/30/2022]
Abstract
HYPOTHESIS The reproducible surface enhanced Raman scattering (SERS)-based sensing of an analyte relies on high quality SERS substrates that offer uniformity over large areas. Uniform ZnO nanoarrays are expected to offer an appropriate platform for SERS sensing. Moreover, since ZnO has good photocatalytic properties, controllable decoration of silver nanoparticles on ZnO nanoarrays may offer an additional opportunity to clean up SERS substrates after each sensing event. EXPERIMENTS This study employs a facile soft chemical synthesis strategy to fabricate Raman-active and recyclable ZnO/Ag nanorod arrays as reproducible SERS substrates. Arrays of ZnO nanorods were synthesized using hydrothermal method, which was followed by controllable decoration of ZnO with silver nanoparticles (AgNPs) using an electroless plating technique. FINDINGS The uniform density of SERS-active 'hot-spots' on ZnO nanoarrays could be controlled on a large 1×1 cm(2) substrate. These ZnO/Ag nanoarrays showed high reproducibility (0.132 RSD) towards acquiring SERS spectra of rhodamine B (RB) at 30 random locations on a single substrate. The photocatalytic nature of ZnO/Ag semiconductor/metal hybrid endowed these substrates with reusability characteristics. By controlling metal loading on a semiconductor surface, photocatalytic activity and high SERS performance can be integrated within a single package to obtain high quality, reproducible, stable and recyclable SERS substrates.
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Affiliation(s)
- Ahmad Esmaielzadeh Kandjani
- Ian Potter NanoBioSensing Facility and NanoBiotechnology Research Laboratory (NBRL), School of Applied Sciences, RMIT University, GPO Box 2476 V, Melbourne, VIC 3001, Australia; Centre for Advanced Materials and Industrial Chemistry, School of Applied Sciences, RMIT University, GPO Box 2476 V, Melbourne, VIC 3001, Australia.
| | - Mahsa Mohammadtaheri
- Ian Potter NanoBioSensing Facility and NanoBiotechnology Research Laboratory (NBRL), School of Applied Sciences, RMIT University, GPO Box 2476 V, Melbourne, VIC 3001, Australia.
| | - Akshi Thakkar
- Ian Potter NanoBioSensing Facility and NanoBiotechnology Research Laboratory (NBRL), School of Applied Sciences, RMIT University, GPO Box 2476 V, Melbourne, VIC 3001, Australia.
| | - Suresh Kumar Bhargava
- Centre for Advanced Materials and Industrial Chemistry, School of Applied Sciences, RMIT University, GPO Box 2476 V, Melbourne, VIC 3001, Australia.
| | - Vipul Bansal
- Ian Potter NanoBioSensing Facility and NanoBiotechnology Research Laboratory (NBRL), School of Applied Sciences, RMIT University, GPO Box 2476 V, Melbourne, VIC 3001, Australia.
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28
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Wang J, Cao X, Wang X, Yang S, Wang R. Electrochemical Oxidation and Determination of Glucose in Alkaline Media Based on Au (111)-Like Nanoparticle Array on Indium Tin Oxide Electrode. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.06.116] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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29
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Renjith A, Roy A, Lakshminarayanan V. In situ fabrication of electrochemically grown mesoporous metallic thin films by anodic dissolution in deep eutectic solvents. J Colloid Interface Sci 2014; 426:270-9. [DOI: 10.1016/j.jcis.2014.04.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Accepted: 04/06/2014] [Indexed: 10/25/2022]
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30
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Huang Y, Dandapat A, Kim DH. Covalently capped seed-mediated growth: a unique approach toward hierarchical growth of gold nanocrystals. NANOSCALE 2014; 6:6478-6481. [PMID: 24828050 DOI: 10.1039/c4nr00587b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Hierarchical metal nanostructures have attracted increasing interest due to their unique morphology-dependent properties. Here, we introduce a new and efficient method to synthesize hierarchical gold nanostructures in different shapes using the covalently capped seed-mediated growth approach.
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Affiliation(s)
- Youju Huang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 637457, Singapore.
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31
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Boopathi S, Senthil Kumar S, Narasimha Phani KL. Generation of Active Sites on Gold Nanostructured Surface through Ultrasound-Assisted Direct Electrodeposition and Its Effect on Enzyme-less Glucose Electro-oxidation. ChemElectroChem 2014. [DOI: 10.1002/celc.201402021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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32
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O'Mullane AP. From single crystal surfaces to single atoms: investigating active sites in electrocatalysis. NANOSCALE 2014; 6:4012-4026. [PMID: 24599277 DOI: 10.1039/c4nr00419a] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Electrocatalytic processes will undoubtedly be at the heart of energising future transportation and technology with the added importance of being able to create the necessary fuels required to do so in an environmentally friendly and cost effective manner. For this to be successful two almost mutually exclusive surface properties need to be reconciled, namely producing highly active/reactive surface sites that exhibit long term stability. This article reviews the various approaches which have been undertaken to study the elusive nature of these active sites on metal surfaces which are considered as adatoms or clusters of adatoms with low coordination number. This includes the pioneering studies at extended well defined stepped single crystal surfaces using cyclic voltammetry up to the highly sophisticated in situ electrochemical imaging techniques used to study chemically synthesised nanomaterials. By combining the information attained from single crystal surfaces, individual nanoparticles of defined size and shape, density functional theory calculations and new concepts such as mesoporous multimetallic thin films and single atom electrocatalysts new insights into the design and fabrication of materials with highly active but stable active sites can be achieved. The area of electrocatalysis is therefore not only a fascinating and exciting field in terms of realistic technological and economical benefits but also from the fundamental understanding that can be acquired by studying such an array of interesting materials.
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Affiliation(s)
- Anthony P O'Mullane
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, GPO Box 2434, Brisbane, QLD 4001, Australia.
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33
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Yang F, Cheng K, Ye K, Wei X, Xiao X, Guo F, Wang G, Cao D. High performance of Au nanothorns supported on Ni foam substrate as the catalyst for NaBH4 electrooxidation. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.10.110] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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34
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Electrocatalytic properties of carbon fiber cloth-supported flower-like Au nanostructures towards ethanol electrooxidation. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.10.048] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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35
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36
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Pearson A, Bhosale S, Bhargava SK, Bansal V. Combining the UV-switchability of Keggin ions with a galvanic replacement process to fabricate TiO2-polyoxometalate-bimetal nanocomposites for improved surface enhanced raman scattering and solar light photocatalysis. ACS APPLIED MATERIALS & INTERFACES 2013; 5:7007-7013. [PMID: 23855393 DOI: 10.1021/am401252h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
While the decoration of TiO2 surfaces with metal nanoparticles has been well-established, the modification of the composition of metal nanoparticles postdeposition onto TiO2 surfaces and applicability of such bimetallic systems for surface enhanced Raman scattering (SERS) and photocatalysis has not hitherto been investigated. In this work, we, for the first time, combine the unique UV-switchability of the Keggin ions of 12-phosphotungstic acid (PTA) to directly form metal nanoparticles (Ag and Cu) onto the colloidal TiO2 surface, with a galvanic replacement process to convert these predeposited metal nanoparticles into bimetallic systems (Ag/Au, Ag/Pt, Cu/Au, Cu/Pt, and Cu/Ag). We further demonstrate the applicability of these novel TiO2-polyoxometalate-bimetal nanocomposites toward improved SERS and solar light photocatalysis.
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Affiliation(s)
- Andrew Pearson
- NanoBiotechnology Research Lab, RMIT University, GPO Box 2476 V, Melbourne VIC 3001, Australia
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37
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Highly reproducible surface-enhanced Raman scattering-active Au nanostructures prepared by simple electrodeposition: Origin of surface-enhanced Raman scattering activity and applications as electrochemical substrates. Anal Chim Acta 2013; 779:1-7. [DOI: 10.1016/j.aca.2013.03.058] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 03/20/2013] [Accepted: 03/25/2013] [Indexed: 11/21/2022]
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38
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Agrawal GK, Timperio AM, Zolla L, Bansal V, Shukla R, Rakwal R. Biomarker discovery and applications for foods and beverages: proteomics to nanoproteomics. J Proteomics 2013; 93:74-92. [PMID: 23619387 DOI: 10.1016/j.jprot.2013.04.014] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Revised: 03/17/2013] [Accepted: 04/01/2013] [Indexed: 12/18/2022]
Abstract
Foods and beverages have been at the heart of our society for centuries, sustaining humankind - health, life, and the pleasures that go with it. The more we grow and develop as a civilization, the more we feel the need to know about the food we eat and beverages we drink. Moreover, with an ever increasing demand for food due to the growing human population food security remains a major concern. Food safety is another growing concern as the consumers prefer varied foods and beverages that are not only traded nationally but also globally. The 21st century science and technology is at a new high, especially in the field of biological sciences. The availability of genome sequences and associated high-throughput sensitive technologies means that foods are being analyzed at various levels. For example and in particular, high-throughput omics approaches are being applied to develop suitable biomarkers for foods and beverages and their applications in addressing quality, technology, authenticity, and safety issues. Proteomics are one of those technologies that are increasingly being utilized to profile expressed proteins in different foods and beverages. Acquired knowledge and protein information have now been translated to address safety of foods and beverages. Very recently, the power of proteomic technology has been integrated with another highly sensitive and miniaturized technology called nanotechnology, yielding a new term nanoproteomics. Nanoproteomics offer a real-time multiplexed analysis performed in a miniaturized assay, with low-sample consumption and high sensitivity. To name a few, nanomaterials - quantum dots, gold nanoparticles, carbon nanotubes, and nanowires - have demonstrated potential to overcome the challenges of sensitivity faced by proteomics for biomarker detection, discovery, and application. In this review, we will discuss the importance of biomarker discovery and applications for foods and beverages, the contribution of proteomic technology in this process, and a shift towards nanoproteomics to suitably address associated issues. This article is part of a Special Issue entitled: Translational plant proteomics.
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Affiliation(s)
- Ganesh Kumar Agrawal
- Research Laboratory for Biotechnology and Biochemistry (RLABB), GPO Box 13265, Kathmandu, Nepal.
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39
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Ramanathan R, Field MR, O'Mullane AP, Smooker PM, Bhargava SK, Bansal V. Aqueous phase synthesis of copper nanoparticles: a link between heavy metal resistance and nanoparticle synthesis ability in bacterial systems. NANOSCALE 2013; 5:2300-2306. [PMID: 23223802 DOI: 10.1039/c2nr32887a] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We demonstrate aqueous phase biosynthesis of phase-pure metallic copper nanoparticles (CuNPs) using a silver resistant bacterium Morganella morganii. This is particularly important considering that there has been no report that demonstrates biosynthesis and stabilization of pure copper nanoparticles in the aqueous phase. Electrochemical analysis of bacterial cells exposed to Cu(2+) ions provides new insights into the mechanistic aspect of Cu(2+) ion reduction within the bacterial cell and indicates a strong link between the silver and copper resistance machinery of bacteria in the context of metal ion reduction. The outcomes of this study take us a step closer towards designing rational strategies for biosynthesis of different metal nanoparticles using microorganisms.
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Affiliation(s)
- Rajesh Ramanathan
- NanoBiotechnology Research Laboratory-NBRL, RMIT University, GPO Box 2476V, Melbourne, VIC 3000, Australia
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40
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Yang F, Cheng K, Wu T, Zhang Y, Yin J, Wang G, Cao D. Preparation of Au nanodendrites supported on carbon fiber cloth and its catalytic performance to H2O2 electroreduction and electrooxidation. RSC Adv 2013. [DOI: 10.1039/c3ra23415k] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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41
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Xu J, Kou T, Zhang Z. Anodization strategy to fabricate nanoporous gold for high-sensitivity detection of p-nitrophenol. CrystEngComm 2013. [DOI: 10.1039/c3ce40880a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Wang X, Yang DP, Huang P, Li M, Li C, Chen D, Cui D. Hierarchically assembled Au microspheres and sea urchin-like architectures: formation mechanism and SERS study. NANOSCALE 2012; 4:7766-72. [PMID: 23138655 DOI: 10.1039/c2nr32405a] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The hierarchically assembled Au microspheres/sea urchin-like structures have been synthesized in aqueous solution at room temperature with and without proteins (bovine serum albumin, BSA) as mediators. The average diameter of an individual Au microsphere is 300-600 nm, which is composed of some compact nanoparticles with an average diameter of about 15 nm. Meanwhile, the sea urchin-like Au architecture exhibits an average diameter of 600-800 nm, which is made up of some nanopricks with an average length of 100-200 nm. These products are characterized by means of scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electronic microscopy (TEM). It is found that the BSA and ascorbic acid (AA) have great effects on the morphology of the resulting products. Two different growth mechanisms are proposed. The study on surface enhanced Raman scattering (SERS) activities is also carried out between Au microspheres and Au sea urchin-like architectures. It is found that Au urchin-like architectures possess much higher SERS activity than the Au microspheres. Our work may shed light on the design and synthesis of hierarchically self-assembled 3D micro/nano-architectures for SERS, catalysis and biosensors.
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Affiliation(s)
- Xiansong Wang
- Department of Bio-Nano-Science and Engineering, National Key Laboratory of Nano/Micro Fabrication Technology, Institute of Micro-Nano Science and Technology, Shanghai Jiao Tong University, Shanghai, 200240, China
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43
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Inorganic materials using 'unusual' microorganisms. Adv Colloid Interface Sci 2012; 179-182:150-68. [PMID: 22818492 DOI: 10.1016/j.cis.2012.06.013] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Revised: 06/06/2012] [Accepted: 06/27/2012] [Indexed: 11/23/2022]
Abstract
A promising avenue of research in materials science is to follow the strategies used by Mother Nature to fabricate ornate hierarchical structures as exemplified by organisms such as diatoms, sponges and magnetotactic bacteria. Some of the strategies used in the biological world to create functional inorganic materials may well have practical implications in the world of nanomaterials. Therefore, the strive towards exploring nature's ingenious work for designing strategies to create inorganic nanomaterials in our laboratories has led to development of biological and biomimetic synthesis routes over the past decade or so. A large proportion of these relentless efforts have explored the use of those microorganisms, which are typically not known to encounter these inorganic materials in their natural environment. Therefore, one can consider these microorganisms as 'unusual' for the purpose for which they have been utilized - it is in this context that this review has been penned down. In this extensive review, we discuss the use of these 'unusual' microorganisms for deliberate biosynthesis of various nanomaterials including biominerals, metals, sulfides and oxides nanoparticles. In addition to biosynthesis approach, we have also discussed a bioleaching approach, which can provide a noble platform for room-temperature synthesis of inorganic nanomaterials using naturally available raw materials. Moreover, the unique properties and functionalities displayed by these biogenic inorganic materials have been discussed, wherever such properties have been investigated previously. Finally, towards the end of this review, we have made efforts to summarize the common outcomes of the biosynthesis process and draw conclusions, which provide a perspective on the current status of the biosynthesis research field and highlights areas where future research in this field should be directed to realize the full potential of biological routes towards nanomaterials synthesis. Furthermore, the review clearly demonstrates that the biological route to inorganic materials synthesis is not merely an addition to the existing list of synthesis routes; biological routes using 'unusual' microorganisms might in fact provide an edge over other nanomaterials synthesis routes in terms of their eco-friendliness, low energy intensiveness, and economically-viable synthesis. This review has significant importance for colloids and interface science since it underpins the synthesis of colloidal materials using 'unusual' microorganism, wherein the role of biological interfaces for controlled synthesis of technologically important nanomaterials is clearly evident.
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Pearson A, O'Mullane AP, Bhargava SK, Bansal V. Comparison of nanostructures obtained from galvanic replacement in water and an ionic liquid for applications in electrocatalysis and SERS. Electrochem commun 2012. [DOI: 10.1016/j.elecom.2012.07.031] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Najdovski I, Selvakannan PR, Bhargava SK, O'Mullane AP. Formation of nanostructured porous Cu-Au surfaces: the influence of cationic sites on (electro)-catalysis. NANOSCALE 2012; 4:6298-6306. [PMID: 22842864 DOI: 10.1039/c2nr31409f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The fabrication of nanostructured bimetallic materials through electrochemical routes offers the ability to control the composition and shape of the final material that can then be effectively applied as (electro)-catalysts. In this work a clean and transitory hydrogen bubble templating method is employed to generate porous Cu-Au materials with a highly anisotropic nanostructured interior. Significantly, the co-electrodeposition of copper and gold promotes the formation of a mixed bimetallic oxide surface which does not occur at the individually electrodeposited materials. Interestingly, the surface is dominated by Au(I) oxide species incorporated within a Cu(2)O matrix which is extremely effective for the industrially important (electro)-catalytic reduction of 4-nitrophenol. It is proposed that an aurophilic type of interaction takes place between both oxidized gold and copper species which stabilizes the surface against further oxidation and facilitates the binding of 4-nitrophenol to the surface and increases the rate of reaction. An added benefit is that very low gold loadings are required typically less than 2 wt% for a significant enhancement in performance to be observed. Therefore the ability to create a partially oxidized Cu-Au surface through a facile electrochemical route that uses a clean template consisting of only hydrogen bubbles should be of benefit for many more important reactions.
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Affiliation(s)
- Ilija Najdovski
- School of Applied Sciences, RMIT University, GPO Box 2476V, Melbourne, VIC 3001, Australia
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Three-dimensional assembly of flower-like Au structures: the synergistic effect of macroporous structures and surface nanoarchitectures on electrocatalysis and electroanalysis. J Solid State Electrochem 2012. [DOI: 10.1007/s10008-012-1708-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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47
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Pearson A, O’Mullane AP, Bhargava SK, Bansal V. Synthesis of CuTCNQ/Au Microrods by Galvanic Replacement of Semiconducting Phase I CuTCNQ with KAuBr4 in Aqueous Medium. Inorg Chem 2012; 51:8791-801. [DOI: 10.1021/ic300555j] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrew Pearson
- School of Applied Sciences, RMIT University, GPO Box 2476 V, Melbourne,
VIC 3001, Australia
| | - Anthony P. O’Mullane
- School of Applied Sciences, RMIT University, GPO Box 2476 V, Melbourne,
VIC 3001, Australia
| | - Suresh K. Bhargava
- School of Applied Sciences, RMIT University, GPO Box 2476 V, Melbourne,
VIC 3001, Australia
| | - Vipul Bansal
- School of Applied Sciences, RMIT University, GPO Box 2476 V, Melbourne,
VIC 3001, Australia
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48
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Plowman BJ, O'Mullane AP, Bhargava SK. The active site behaviour of electrochemically synthesised gold nanomaterials. Faraday Discuss 2012; 152:43-62; discussion 99-120. [PMID: 22455038 DOI: 10.1039/c1fd00017a] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Even though gold is the noblest of metals, a weak chemisorber and is regarded as being quite inert, it demonstrates significant electrocatalytic activity in its nanostructured form. It is demonstrated here that nanostructured and even evaporated thin films of gold are covered with active sites which are responsible for such activity. The identification of these sites is demonstrated with conventional electrochemical techniques such as cyclic voltammetry as well as a large amplitude Fourier transformed alternating current (FT-ac) method under acidic and alkaline conditions. The latter technique is beneficial in determining if an electrode process is either Faradaic or capacitive in nature. The observed behaviour is analogous to that observed for activated gold electrodes whose surfaces have been severely disrupted by cathodic polarisation in the hydrogen evolution region. It is shown that significant electrochemical oxidation responses occur at discrete potential values well below that for the formation of the compact monolayer oxide of bulk gold and are attributed to the facile oxidation of surface active sites. Several electrocatalytic reactions are explored in which the onset potential is determined by the presence of such sites on the surface. Significantly, the facile oxidation of active sites is used to drive the electroless deposition of metals such as platinum, palladium and silver from their aqueous salts on the surface of gold nanostructures. The resultant surface decoration of gold with secondary metal nanoparticles not only indicates regions on the surface which are rich in active sites but also provides a method to form interesting bimetallic surfaces.
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Affiliation(s)
- Blake J Plowman
- School of Applied Sciences, RMIT University, GPO Box 2476V, VIC 3001, Australia
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Chrimes AF, Khoshmanesh K, Stoddart PR, Kayani AA, Mitchell A, Daima H, Bansal V, Kalantar-zadeh K. Active Control of Silver Nanoparticles Spacing Using Dielectrophoresis for Surface-Enhanced Raman Scattering. Anal Chem 2012; 84:4029-35. [DOI: 10.1021/ac203381n] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Adam F. Chrimes
- School of Electrical and Computer
Engineering, RMIT University, Melbourne,
Victoria, Australia
| | - Khashayar Khoshmanesh
- School of Electrical and Computer
Engineering, RMIT University, Melbourne,
Victoria, Australia
| | - Paul R. Stoddart
- Centre
for Atom Optics and Ultrafast
Spectroscopy, Swinburne University, Victoria,
Australia
| | - Aminuddin A. Kayani
- School of Electrical and Computer
Engineering, RMIT University, Melbourne,
Victoria, Australia
| | - Arnan Mitchell
- School of Electrical and Computer
Engineering, RMIT University, Melbourne,
Victoria, Australia
| | - Hemant Daima
- School of Applied
Sciences, RMIT University, Melbourne, Victoria,
Australia
| | - Vipul Bansal
- School of Applied
Sciences, RMIT University, Melbourne, Victoria,
Australia
| | - Kourosh Kalantar-zadeh
- School of Electrical and Computer
Engineering, RMIT University, Melbourne,
Victoria, Australia
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50
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Ye W, Chen Y, Zhou F, Wang C, Li Y. Fluoride-assisted galvanic replacement synthesis of Ag and Au dendrites on aluminum foil with enhanced SERS and catalytic activities. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm32170j] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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