1
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Ramaiah KB, Suresh I, Srinandan CS, Sai Subramanian N, Rayappan JBB. A dual-sensing strategy for the early diagnosis of urinary tract infections via detecting biofilm cellulose using aromatic amino acid-capped Au and Ag nanoparticles. J Mater Chem B 2024; 12:7564-7576. [PMID: 38982956 DOI: 10.1039/d4tb00902a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2024]
Abstract
Currently, urinary tract infection (UTI) diagnosis focuses on planktonic cell detection rather than biofilm detection, but the facile identification of UPEC bacterial biofilms is crucial in UTI diagnosis as the biofilm formed by bacteria is the causative agent of recurrent and chronic UTIs. Therefore, in this work, we developed a simple, cost-effective, colorimetric, and electrochemical-based strategy for the detection of cellulose in urine. Cellulose, a biofilm matrix component, was detected using tyrosine-capped gold and silver nanoparticles through a visible colorimetric change with a decrease in the absorbance intensity and a decrease in current response in the case of cyclic voltammetry. The sensor displayed a linear detection range of 10-70 mg mL-1 for colorimetry and 10-300 μg mL-1 for cyclic voltammetry with a good selectivity of <2.8% and a recovery rate of 95-100% in real-time sample analysis. Moreover, the binding affinity of cellulose with tyrosine was investigated using molecular docking studies to validate the sensing mechanism. We anticipate that our work will aid clinicians in the implementation of rapid, cost-effective, and definitive diagnosis of UTIs.
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Affiliation(s)
- Kavi Bharathi Ramaiah
- Centre for Nanotechnology & Advanced Biomaterials (CeNTAB), SASTRA Deemed University, Thanjavur, 613401, Tamil Nadu, India.
- School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India
- Biofilm Biology Lab & Antimicrobial Resistance Lab, Centre for Research in Infectious Diseases, SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India
| | - Indhu Suresh
- Centre for Nanotechnology & Advanced Biomaterials (CeNTAB), SASTRA Deemed University, Thanjavur, 613401, Tamil Nadu, India.
- School of Electrical and Electronics Engineering, SASTRA Deemed University, Thanjavur, 613401, Tamil Nadu, India
| | - C S Srinandan
- Centre for Nanotechnology & Advanced Biomaterials (CeNTAB), SASTRA Deemed University, Thanjavur, 613401, Tamil Nadu, India.
- School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India
- Biofilm Biology Lab & Antimicrobial Resistance Lab, Centre for Research in Infectious Diseases, SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India
| | - N Sai Subramanian
- Centre for Nanotechnology & Advanced Biomaterials (CeNTAB), SASTRA Deemed University, Thanjavur, 613401, Tamil Nadu, India.
- School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India
- Biofilm Biology Lab & Antimicrobial Resistance Lab, Centre for Research in Infectious Diseases, SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India
| | - John Bosco Balaguru Rayappan
- Centre for Nanotechnology & Advanced Biomaterials (CeNTAB), SASTRA Deemed University, Thanjavur, 613401, Tamil Nadu, India.
- School of Electrical and Electronics Engineering, SASTRA Deemed University, Thanjavur, 613401, Tamil Nadu, India
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2
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Seo S, Oh IH, Chang ST. On-Chip Micro-Supercapacitor with High Areal Energy Density Based on Dielectrophoretic Assembly of Nanoporous Metal Microwire Electrodes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2311726. [PMID: 38497508 DOI: 10.1002/smll.202311726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Revised: 02/29/2024] [Indexed: 03/19/2024]
Abstract
Advances in the Internet of Things (IoT) technology have driven the demand for miniaturized electronic devices, prompting research on small-scale energy-storage systems. Micro-supercapacitors (MSCs) stand out in this regard because of their compact size, high power density, high charge-discharge rate, and extended cycle life. However, their limited energy density impedes commercialization. To resolve this issue, a simple and innovative approach is reported herein for fabricating highly efficient on-chip MSCs integrated with nanoporous metal microwires formed by dielectrophoresis (DEP)-driven gold nanoparticle (AuNP) assembly. Placing a water-based AuNP suspension onto interdigitated electrodes and applying an alternating voltage induces in-plane porous microwire formation in the electrode gap. The DEP-induced AuNP assembly and the gold microwire (AuMW) growth rate can be adjusted by controlling the applied alternating voltage and frequency. The microwire-integrated MSC (AuMW-MSC) electrically outperforms its unmodified counterpart and exhibits a 30% larger electrode area, along with 72% and 78% higher specific and areal capacitances, respectively, than a microwire-free MSC. Additionally, AuMW-MSC achieves maximum energy and power densities of 3.33 µWh cm-2 and 2629 µW cm-2, respectively, with a gel electrolyte. These findings can help upgrade MSCs to function as potent energy-storage devices for small electronics.
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Affiliation(s)
- Seungdeok Seo
- School of Chemical Engineering and Materials Science, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, Republic of Korea
| | - In Hyeok Oh
- School of Chemical Engineering and Materials Science, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, Republic of Korea
| | - Suk Tai Chang
- School of Chemical Engineering and Materials Science, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, Republic of Korea
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3
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Chen F, Zhao M, Zhang B, Zhao M, Ma Y. Surface Plasmon Resonance-Enhanced CdS/FTO Heterojunction for Cu 2+ Detection. SENSORS (BASEL, SWITZERLAND) 2024; 24:3809. [PMID: 38931593 PMCID: PMC11207611 DOI: 10.3390/s24123809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2024] [Revised: 06/09/2024] [Accepted: 06/11/2024] [Indexed: 06/28/2024]
Abstract
Copper ion (Cu2+) pollution poses a serious threat to marine ecology and fisheries. However, the complexity of seawater and its interference factors make the online detection of Cu2+ quite challenging. To address this issue, we introduce the concept of the photo-assisted adjustment barrier effect into electrochemical detection, using it as a driving force to generate electrochemical responses. The Schottky barrier demonstrates a remarkable regulatory influence on the electrochemical response under photoexcitation, facilitating the response through Cu2+ adsorption. We developed a 4-MBA-AuNPs/CdS/FTO composite that serves as a sensitive platform for Cu2+ detection, achieving a detection limit of 70 nM. Notably, the photo-assisted adjustment of the barrier effect effectively counters the interference posed by ions in seawater, ensuring accurate detection. Furthermore, the sensor exhibits a promising recovery rate (99.62-104.9%) in real seawater samples, highlighting its practical applications. This innovative approach utilizing the photo-assisted adjustment barrier effect offers a promising path for developing electrochemical sensors that can withstand interference.
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Affiliation(s)
| | | | | | - Minggang Zhao
- School of Material Science and Engineering, Ocean University of China, 238 Songling Road, Qingdao 266100, China
| | - Ye Ma
- School of Material Science and Engineering, Ocean University of China, 238 Songling Road, Qingdao 266100, China
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4
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Saeloo B, Jitapunkul K, Iamprasertkun P, Panomsuwan G, Sirisaksoontorn W, Sooknoi T, Hirunpinyopas W. Size-Dependent Graphene Support for Decorating Gold Nanoparticles as a Catalyst for Hydrogen Evolution Reaction with Machine Learning-Assisted Prediction. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37919242 DOI: 10.1021/acsami.3c10553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2023]
Abstract
Size-dependent two-dimensional (2D) materials (e.g., graphene) have been recently used to improve their performance in various applications such as membrane filtration, energy storage, and electrocatalysts. It has also been demonstrated that 2D nanosheets can be one of the promising support materials for decorating nanoparticles (NPs). However, the optimum nanosheet size (lateral length and thickness) for supporting NPs has not yet been explored to enhance their catalytic performance. Herein, we elucidate the mechanism behind size-dependent graphene (GP) as a support due to which gold nanoparticles (AuNPs) are used as an active catalyst for the hydrogen evolution reaction (HER). Surprisingly, the decoration of AuNPs increased with the increasing nanosheet size, counter to what is widely reported in the literature (high surface area for smaller nanosheet size). We found that a large graphene nanosheet (lGP; ∼800 nm) used as the AuNP support (lGP/AuNPs) exhibited superior performance for the HER with long-term stability. The lGP/AuNPs with a suitable content of AuNPs provides a low overpotential and a small Tafel slope, being lower than that of other reported carbon-based HER electrocatalysts. This results from highly exposed active sites of well-dispersed AuNPs on lGP giving high conductivity. The laminar structure of the stacked graphene nanosheets and the high wettability of the lGP/AuNPs electrode surface also play crucial roles in enhancing electrolytes for penetration in the electrode, suggesting a highly electrochemical surface area. Moreover, machine learning (Random Forest) was also used to reveal the essential features of the advanced catalytic material design for catalyst-based applications.
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Affiliation(s)
- Boontarika Saeloo
- Department of Chemistry and Centre of Excellence for Innovation in Chemistry, Faculty of Science, Kasetsart University, Chatuchak, Bangkok 10900, Thailand
| | - Kulpavee Jitapunkul
- School of Bio-Chemical Engineering and Technology Sirindhorn International Institute of Technology (SIIT), Thammasat University - Rangsit Campus, Khlong Nueng, Pathum Thani 12120, Thailand
- Research Unit in Sustainable Electrochemical Intelligent, Thammasat University, Khlong Nueng, Pathum Thani 12120, Thailand
| | - Pawin Iamprasertkun
- School of Bio-Chemical Engineering and Technology Sirindhorn International Institute of Technology (SIIT), Thammasat University - Rangsit Campus, Khlong Nueng, Pathum Thani 12120, Thailand
- Research Unit in Sustainable Electrochemical Intelligent, Thammasat University, Khlong Nueng, Pathum Thani 12120, Thailand
| | - Gasidit Panomsuwan
- Department of Materials Engineering, Faculty of Engineering, Kasetsart University, Chatuchak, Bangkok 10900, Thailand
| | - Weekit Sirisaksoontorn
- Department of Chemistry and Centre of Excellence for Innovation in Chemistry, Faculty of Science, Kasetsart University, Chatuchak, Bangkok 10900, Thailand
| | - Tawan Sooknoi
- Department of Chemistry, School of Science, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung Road, Ladkrabang, Bangkok 10520, Thailand
| | - Wisit Hirunpinyopas
- Department of Chemistry and Centre of Excellence for Innovation in Chemistry, Faculty of Science, Kasetsart University, Chatuchak, Bangkok 10900, Thailand
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5
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Magesh V, Kothari VS, Ganapathy D, Atchudan R, Arya S, Nallaswamy D, Sundramoorthy AK. Using Sparfloxacin-Capped Gold Nanoparticles to Modify a Screen-Printed Carbon Electrode Sensor for Ethanol Determination. SENSORS (BASEL, SWITZERLAND) 2023; 23:8201. [PMID: 37837031 PMCID: PMC10575339 DOI: 10.3390/s23198201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/18/2023] [Accepted: 09/27/2023] [Indexed: 10/15/2023]
Abstract
Alcohol is a dangerous substance causing global mortality and health issues, including mental health problems. Regular alcohol consumption can lead to depression, anxiety, cognitive decline, and increased risk of alcohol-related disorders. Thus, monitoring ethanol levels in biological samples could contribute to maintaining good health. Herein, we developed an electrochemical sensor for the determination of ethanol in human salivary samples. Initially, the tetra-chloroauric acid (HAuCl4) was chemically reduced using sparfloxacin (Sp) which also served as a stabilizing agent for the gold nanoparticles (AuNPs). As-prepared Sp-AuNPs were comprehensively characterized and confirmed by UV-visible spectroscopy, X-ray diffraction, field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDS), and elemental mapping analysis. The average particle size (~25 nm) and surface charge (negative) of Sp-AuNPs were determined by using dynamic light scattering (DLS) and Zeta potential measurements. An activated screen-printed carbon electrode (A-SPE) was modified using Sp-AuNPs dispersion, which exhibited greater electrocatalytic activity and sensitivity for ethanol (EtOH) oxidation in 0.1 M sodium hydroxide (NaOH) as studied by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). DPV showed a linear response for EtOH from 25 µM to 350 µM with the lowest limit of detection (LOD) of 0.55 µM. Reproducibility and repeatability studies revealed that the Sp-AuNPs/A-SPEs were highly stable and very sensitive to EtOH detection. Additionally, the successful electrochemical determination of EtOH in a saliva sample was carried out. The recovery rate of EtOH spiked in the saliva sample was found to be 99.6%. Thus, the incorporation of Sp-AuNPs within sensors could provide new possibilities in the development of ethanol sensors with an improved level of precision and accuracy.
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Affiliation(s)
- Vasanth Magesh
- Centre for Nano-Biosensors, Department of Prosthodontics, Saveetha Institute of Medical and Technical Sciences, Saveetha Dental College and Hospitals, 162 Poonamallee High Road, Velappanchavadi, Chennai 600077, India
| | - Vishaka S. Kothari
- Centre for Nano-Biosensors, Department of Prosthodontics, Saveetha Institute of Medical and Technical Sciences, Saveetha Dental College and Hospitals, 162 Poonamallee High Road, Velappanchavadi, Chennai 600077, India
| | - Dhanraj Ganapathy
- Centre for Nano-Biosensors, Department of Prosthodontics, Saveetha Institute of Medical and Technical Sciences, Saveetha Dental College and Hospitals, 162 Poonamallee High Road, Velappanchavadi, Chennai 600077, India
| | - Raji Atchudan
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Sandeep Arya
- Department of Physics, University of Jammu, Jammu 180006, India
| | - Deepak Nallaswamy
- Centre for Nano-Biosensors, Department of Prosthodontics, Saveetha Institute of Medical and Technical Sciences, Saveetha Dental College and Hospitals, 162 Poonamallee High Road, Velappanchavadi, Chennai 600077, India
| | - Ashok K. Sundramoorthy
- Centre for Nano-Biosensors, Department of Prosthodontics, Saveetha Institute of Medical and Technical Sciences, Saveetha Dental College and Hospitals, 162 Poonamallee High Road, Velappanchavadi, Chennai 600077, India
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6
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Banerjee NS, Ghosh D, Mitra I, Paul S, Show B, Ganguly T, Chakraborty M. Interactive study of Au20 nanocluster and methyl substituted amide linked tyrosine/tryptophan to develop representative model for studying protein-nanoparticle interaction. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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7
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Insights into the DMH tautomeric structures and its effects on the electro-reduction of Au(DMH)4− coordination ions. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2022.141494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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8
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Volders J, Elen K, Raes A, Ninakanti R, Kelchtermans AS, Sastre F, Hardy A, Cool P, Verbruggen SW, Buskens P, Van Bael MK. Sunlight-Powered Reverse Water Gas Shift Reaction Catalysed by Plasmonic Au/TiO 2 Nanocatalysts: Effects of Au Particle Size on the Activity and Selectivity. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4153. [PMID: 36500776 PMCID: PMC9738324 DOI: 10.3390/nano12234153] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 11/14/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
This study reports the low temperature and low pressure conversion (up to 160 °C, p = 3.5 bar) of CO2 and H2 to CO using plasmonic Au/TiO2 nanocatalysts and mildly concentrated artificial sunlight as the sole energy source (up to 13.9 kW·m-2 = 13.9 suns). To distinguish between photothermal and non-thermal contributors, we investigated the impact of the Au nanoparticle size and light intensity on the activity and selectivity of the catalyst. A comparative study between P25 TiO2-supported Au nanocatalysts of a size of 6 nm and 16 nm displayed a 15 times higher activity for the smaller particles, which can only partially be attributed to the higher Au surface area. Other factors that may play a role are e.g., the electronic contact between Au and TiO2 and the ratio between plasmonic absorption and scattering. Both catalysts displayed ≥84% selectivity for CO (side product is CH4). Furthermore, we demonstrated that the catalytic activity of Au/TiO2 increases exponentially with increasing light intensity, which indicated the presence of a photothermal contributor. In dark, however, both Au/TiO2 catalysts solely produced CH4 at the same catalyst bed temperature (160 °C). We propose that the difference in selectivity is caused by the promotion of CO desorption through charge transfer of plasmon generated charges (as a non-thermal contributor).
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Affiliation(s)
- Jordi Volders
- Design and Synthesis of Inorganic Materials (DESINe), Institute for Materials Research, Hasselt University, Agoralaan Building D, 3590 Diepenbeek, Belgium
- Imec Vzw, Imomec Associated Laboratory, Wetenschapspark 1, 3590 Diepenbeek, Belgium
- EnergyVille, Thor Park 8320, 3600 Genk, Belgium
| | - Ken Elen
- Design and Synthesis of Inorganic Materials (DESINe), Institute for Materials Research, Hasselt University, Agoralaan Building D, 3590 Diepenbeek, Belgium
- Imec Vzw, Imomec Associated Laboratory, Wetenschapspark 1, 3590 Diepenbeek, Belgium
- EnergyVille, Thor Park 8320, 3600 Genk, Belgium
| | - Arno Raes
- Sustainable Energy, Air & Water Technology (DuEL), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
- NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Rajeshreddy Ninakanti
- Sustainable Energy, Air & Water Technology (DuEL), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
- NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - An-Sofie Kelchtermans
- Design and Synthesis of Inorganic Materials (DESINe), Institute for Materials Research, Hasselt University, Agoralaan Building D, 3590 Diepenbeek, Belgium
- Imec Vzw, Imomec Associated Laboratory, Wetenschapspark 1, 3590 Diepenbeek, Belgium
- EnergyVille, Thor Park 8320, 3600 Genk, Belgium
| | - Francesc Sastre
- The Netherlands Organisation for Applied Scientific Research (TNO), High Tech Campus 25, 5656 AE Eindhoven, The Netherlands
| | - An Hardy
- Design and Synthesis of Inorganic Materials (DESINe), Institute for Materials Research, Hasselt University, Agoralaan Building D, 3590 Diepenbeek, Belgium
- Imec Vzw, Imomec Associated Laboratory, Wetenschapspark 1, 3590 Diepenbeek, Belgium
- EnergyVille, Thor Park 8320, 3600 Genk, Belgium
| | - Pegie Cool
- Laboratory of Adsorption and Catalysis, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Sammy W. Verbruggen
- Sustainable Energy, Air & Water Technology (DuEL), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
- NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Pascal Buskens
- Design and Synthesis of Inorganic Materials (DESINe), Institute for Materials Research, Hasselt University, Agoralaan Building D, 3590 Diepenbeek, Belgium
- The Netherlands Organisation for Applied Scientific Research (TNO), High Tech Campus 25, 5656 AE Eindhoven, The Netherlands
| | - Marlies K. Van Bael
- Design and Synthesis of Inorganic Materials (DESINe), Institute for Materials Research, Hasselt University, Agoralaan Building D, 3590 Diepenbeek, Belgium
- Imec Vzw, Imomec Associated Laboratory, Wetenschapspark 1, 3590 Diepenbeek, Belgium
- EnergyVille, Thor Park 8320, 3600 Genk, Belgium
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9
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Screen-printed electrode modified by Au/NH2-MIL-125(Ti) composite for electrochemical sensing performance of gallic acid in green tea and urine samples. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.140074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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10
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Sadique M, Yadav S, Ranjan P, Khan R, Khan F, Kumar A, Biswas D. Highly Sensitive Electrochemical Immunosensor Platforms for Dual Detection of SARS-CoV-2 Antigen and Antibody based on Gold Nanoparticle Functionalized Graphene Oxide Nanocomposites. ACS APPLIED BIO MATERIALS 2022; 5:2421-2430. [PMID: 35522141 PMCID: PMC9113004 DOI: 10.1021/acsabm.2c00301] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 04/21/2022] [Indexed: 12/12/2022]
Abstract
In this work, we report a facile synthesis of graphene oxide-gold (GO-Au) nanocomposites by electrodeposition. The fabricated electrochemical immunosensors are utilized for the dual detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antigen and SARS-CoV-2 antibody. The GO-Au nanocomposites has been characterized by UV-vis spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), cyclic voltammetry (CV), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS) for its biosensing properties. The linear detection range of the SARS-CoV-2 antigen immunosensor is 10.0 ag mL-1 to 50.0 ng mL-1, whereas that for the antibody immunosensor ranges from 1.0 fg mL-1 to 1.0 ng mL-1. The calculated limit of detection (LOD) of the SARS-CoV-2 antigen immunosensor is 3.99 ag mL-1, and that for SARS-CoV-2 antibody immunosensor is 1.0 fg mL-1 with high sensitivity. The validation of the immunosensor has also been carried out on patient serum and patient swab samples from COVID-19 patients. The results suggest successful utilization of the immunosensors with a very low detection limit enabling its use in clinical samples. Further work is needed for the standardization of the results and translation in screen-printed electrodes for use in portable commercial applications.
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Affiliation(s)
- Mohd.
Abubakar Sadique
- Industrial
Waste Utilization, Nano and Biomaterials, CSIR - Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal 462026, India
- Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Shalu Yadav
- Industrial
Waste Utilization, Nano and Biomaterials, CSIR - Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal 462026, India
- Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Pushpesh Ranjan
- Industrial
Waste Utilization, Nano and Biomaterials, CSIR - Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal 462026, India
- Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Raju Khan
- Industrial
Waste Utilization, Nano and Biomaterials, CSIR - Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal 462026, India
- Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Firoz Khan
- Department
of Biochemistry, All India Institute of
Medical Sciences (AIIMS), Bhopal 462020, India
| | - Ashok Kumar
- Department
of Biochemistry, All India Institute of
Medical Sciences (AIIMS), Bhopal 462020, India
| | - Debasis Biswas
- Department
of Microbiology, All India Institute of
Medical Sciences (AIIMS), Bhopal 462020, India
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11
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Yuan Y, Luo G, Li N. New in situ description of electrodepositing multiple nucleation processes under galvanostatic stimuli. RSC Adv 2021; 11:31526-31532. [PMID: 35496875 PMCID: PMC9041530 DOI: 10.1039/d1ra04988g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 09/09/2021] [Indexed: 11/23/2022] Open
Abstract
Chronoamperometry was used to investigate phase transformations at the early stage of electrodeposition under potentiostatic stimuli. Whilst electrodeposition mostly occurs under galvanostatic stimuli, this work provides a new in situ description using chronopotentiometry to analyse phase transformations during electrodeposition. With theoretical Ohm's law electro-relationship formula derivation, a non-dimensional plot between (ΔEmin/ΔET)2 and t/tm was established similar to (It/Imax)2vs. t/tm in the SH model. The non-dimensional plots were verified by the chronopotentiometry curve during gold electrodeposition. This work provides a new method of investigating phase transformation using chronopotentiometry during electrodeposition. Schematic illustration and equivalent circuit during electrodeposition nucleation at the early stage as controlled by diffusion.![]()
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Affiliation(s)
- Yuan Yuan
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology Harbin 150001 People's Republic of China
| | - Gong Luo
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology Harbin 150001 People's Republic of China .,College of Mechanical and Electrical Engineering, Guangdong University of Petrochemical Technology Maoming 525000 People's Republic of China
| | - Ning Li
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology Harbin 150001 People's Republic of China
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12
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TiO2 Doped with Noble Metals as an Efficient Solution for the Photodegradation of Hazardous Organic Water Pollutants at Ambient Conditions. WATER 2020. [DOI: 10.3390/w13010019] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This work highlights new insights into the performance of TiO2 doped with noble metal catalysts for the photocatalytic degradation of organic water pollutants. Different samples of titanium dioxide doped with noble metals (Au and Pd) were successfully synthesized via incipient wet impregnation (IWI) and ultrasound-assisted impregnation (US) methods. X-ray diffraction, scanning electron microscopy and UV-Vis reflectance spectroscopy were used for the characterization of the obtained materials. Their photocatalytic efficiency was investigated in aqueous suspension thorough a series of laboratory tests performed under ultraviolet (UV-A) irradiation conditions using 2,4 dinitrophenol (2,4 DNP) as a target molecule. The results clearly show that the method used for the catalyst synthesis affects its photocatalytic activity. It was found that the samples prepared by the IWI method exhibited high photocatalytic activity, and the removal rate obtained with TiO2-Pd/IWI was higher than that found for TiO2-Au/IWI. Furthermore, for the best catalyst, some extra photocatalytic experiments were conducted with rhodamine 6G (R6G), a highly stable molecule with a very different chemical structure to 2,4 DNP, in order to check the reactivity of this material. Moreover, the recycling experiments carried out with TiO2-Pd/IWI clearly demonstrated the high photocatalytic stability of this material for the degradation of 2,4 DNP. All of the collected data confirmed the interesting photocatalytic potential of the selected catalyst in the elimination of organic pollutants with no obvious change in its reactivity after four reaction cycles, which is very promising for promoting future applications in water depollution.
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13
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Abstract
Some alloys are very difficult to electrodeposit, due to problems such as the large difference in the equilibrium potentials and/or deposition kinetics of the alloy components, as well as the bath instability due to the spontaneous reactions in the bulk electrolyte. The Ag-Fe system is one of those. In this work, a novel alkaline citrate-dimethylhydantoin (DMH) complex has been used to synthesize thermodynamically immiscible Ag-Fe alloy films. The large difference in standard potentials and deposition kinetics of Ag and Fe is partially resolved by complexing Ag(I) with DMH, while the instability caused from spontaneous reduction of Ag(I) by Fe(II) was partially resolved by adding 1% Fe3+, based on the philosophy of the mixed potential theory. Furthermore, a paradigm for control of film composition is developed, based on the mass-transfer coefficient ratio, tested with various bath constitutions. Uniform and high-quality films are obtained, with a composition error of <4 at. % comparing with the predicted values. Electrochemical reactions involved in the deposition baths were systematically investigated using cyclic voltammetry, showing satisfactory agreement with the predicted deposition potentials calculated by equilibrium thermodynamics. The films deposited at high overpotential are proven to be biphasic, containing Ag-fcc and Fe-bcc phases, with a trend of decreasing crystallinity at increasing overpotentials when deposited at constant deposition time. A narrow transition potential range (<0.05 V) from the onset of Fe deposition to its limiting current condition was observed.
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Affiliation(s)
- Yunkai Sun
- Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Giovanni Zangari
- Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
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14
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Taheri H, Unal MA, Sevim M, Gurcan C, Ekim O, Ceylan A, Syrgiannis Z, Christoforidis KC, Bosi S, Ozgenç O, Gómez MJ, Turktas Erken M, Soydal Ç, Eroğlu Z, Bitirim CV, Cagin U, Arı F, Ozen A, Kuçuk O, Delogu LG, Prato M, Metin Ö, Yilmazer A. Photocatalytically Active Graphitic Carbon Nitride as an Effective and Safe 2D Material for In Vitro and In Vivo Photodynamic Therapy. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1904619. [PMID: 31971659 DOI: 10.1002/smll.201904619] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 12/02/2019] [Indexed: 06/10/2023]
Abstract
Thanks to its photocatalytic property, graphitic carbon nitride (g-C3 N4 ) is a promising candidate in various applications including nanomedicine. However, studies focusing on the suitability of g-C3 N4 for cancer therapy are very limited and possible underlying molecular mechanisms are unknown. Here, it is demonstrated that photoexcitation of g-C3 N4 can be used effectively in photodynamic therapy, without using any other carrier or additional photosensitizer. Upon light exposure, g-C3 N4 treatment kills cancer cells, without the need of any other nanosystem or chemotherapeutic drug. The material is efficiently taken up by tumor cells in vitro. The transcriptome and proteome of g-C3 N4 and light treated cells show activation in pathways related to both oxidative stress, cell death, and apoptosis which strongly suggests that only when combined with light exposure, g-C3 N4 is able to kill cancer cells. Systemic administration of the mesoporous form results in elimination from urinary bladder without any systemic toxicity. Administration of the material significantly decreases tumor volume when combined with local light treatment. This study paves the way for the future use of not only g-C3 N4 but also other 2D nanomaterials in cancer therapy.
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Affiliation(s)
- Hadiseh Taheri
- Department of Biomedical Engineering, Faculty of Engineering, Ankara University, Ankara, 06830, Turkey
| | - Mehmet Altay Unal
- Department of Physical Engineering, Faculty of Engineering, Ankara University, Ankara, 06100, Turkey
- Stem Cell Institute, Ankara University, Ankara, 06520, Turkey
| | - Melike Sevim
- Department of Chemistry, Faculty of Science, Ataturk University, Erzurum, 25240, Turkey
| | - Cansu Gurcan
- Department of Biomedical Engineering, Faculty of Engineering, Ankara University, Ankara, 06830, Turkey
- Stem Cell Institute, Ankara University, Ankara, 06520, Turkey
| | - Okan Ekim
- Department of Anatomy, Faculty of Veterinary, Ankara University, Ankara, 06110, Turkey
| | - Ahmet Ceylan
- Department of Histology Embryology, Faculty of Veterinary, Ankara University, Ankara, 06110, Turkey
| | - Zois Syrgiannis
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, 34127, Italy
| | | | - Susanna Bosi
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, 34127, Italy
| | - Ozge Ozgenç
- Department of Histology Embryology, Faculty of Veterinary, Ankara University, Ankara, 06110, Turkey
| | - Manuel José Gómez
- Centro Nacional de Investigaciones Cardiovasculares, Madrid, 28029, Spain
| | - Mine Turktas Erken
- Department of Biology, Faculty of Science, Cankiri Karatekin University, Cankiri, 18100, Turkey
| | - Çigdem Soydal
- Department of Nuclear Medicine, Faculty of Medicine, Ankara University, Ankara, 06590, Turkey
| | - Zafer Eroğlu
- Department of Chemistry, Faculty of Science, Ataturk University, Erzurum, 25240, Turkey
| | | | - Umut Cagin
- Genethon and INSERM U951, Evry, 91002, France
| | - Fikret Arı
- Department of Electrical and Electronics Engineering, Faculty of Engineering, Ankara University, Ankara, 06830, Turkey
| | - Asuman Ozen
- Department of Histology Embryology, Faculty of Veterinary, Ankara University, Ankara, 06110, Turkey
| | - Ozlem Kuçuk
- Department of Nuclear Medicine, Faculty of Medicine, Ankara University, Ankara, 06590, Turkey
- Cancer Institute, Ankara University, Ankara, 06590, Turkey
| | - Lucia Gemma Delogu
- Department of Biomedical Sciences, University of Padua, Padua, 35122, Italy
- Institute of Pediatric Research, Città Della Speranza, Padua, 35129, Italy
| | - Maurizio Prato
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, 34127, Italy
- Carbon Bionanotechnology Laboratory CIC biomaGUNE, Paseo de Miramón, 182, Donostia-San Sebastian, 20009, Spain
- Basque Foundation for Science, Ikerbasque, Bilbao, 48013, Spain
| | - Önder Metin
- Department of Chemistry, College of Sciences, Koç University, Istanbul, 34450, Turkey
| | - Açelya Yilmazer
- Department of Biomedical Engineering, Faculty of Engineering, Ankara University, Ankara, 06830, Turkey
- Stem Cell Institute, Ankara University, Ankara, 06520, Turkey
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15
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Wu B, Huang J, Lv Z, Cui Z, Hu G, Luo J, Selim MS, Hao Z. Experimental and DFT study of the effect of mercaptosuccinic acid on cyanide-free immersion gold deposition. RSC Adv 2020; 10:9768-9776. [PMID: 35498623 PMCID: PMC9050236 DOI: 10.1039/d0ra00925c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 02/21/2020] [Indexed: 01/19/2023] Open
Abstract
In order to search for an effective alternative to cyanide for gold plating, mercaptosuccinic acid (MSA) was selected as the complexing agent of Au+ by open circuit potential tests and gold plating compared with 1-hydroxyethylidene-1,1-diphosphonic acid and aminomethylphosphonic acid. For the first time, a novel, stable, slightly acidic and cyanide-free gold plating bath was prepared. Scanning electron microscopy, Tafel tests, and tin dipping tests showed that the Cu/Ni–P/Au coating had a fine and even grain size, no black pad, good corrosion resistance, and good weldability. Quantum chemical calculations based on density functional theory were used to further study complexants and complexes. Molecular electrostatic potential indicates that Au+ approaches MSA in the direction of C
Created by potrace 1.16, written by Peter Selinger 2001-2019
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O. Frontier molecular orbital theory, atomic contribution to orbital composition, condensed local softness, and average local ionization energy indicate that the coordination capacity of the S atom in MSA is much stronger than that of other atoms. Fuzzy bond order analysis shows that the S–Au–S coordination structure is the most stable form in the plating solution. UV-visible absorption spectroscopy clarifies that the wavelength is redshifted when MSA–Au(i) ions form. A cyanide-free gold plating bath was prepared and the complexing capacity of mercaptosuccinic acid with Au(i) was studied through density functional theory.![]()
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Affiliation(s)
- Bo Wu
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- P. R. China
| | - Jingmeng Huang
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- P. R. China
| | - Zeman Lv
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- P. R. China
| | - Ziya Cui
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- P. R. China
| | - Guanghui Hu
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- P. R. China
| | - Jiye Luo
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- P. R. China
| | - Mohamed S. Selim
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- P. R. China
- Petroleum Application Department
| | - Zhifeng Hao
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- P. R. China
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16
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Jin L, Liu C, Yang FZ, Wu DY, Tian ZQ. Coordination behavior of theophylline with Au(III) and electrochemical reduction of the complex. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.02.118] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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17
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Rengaraj A, Haldorai Y, Hwang SK, Lee E, Oh MH, Jeon TJ, Han YK, Huh YS. A protamine-conjugated gold decorated graphene oxide composite as an electrochemical platform for heparin detection. Bioelectrochemistry 2019; 128:211-217. [PMID: 31030173 DOI: 10.1016/j.bioelechem.2019.04.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 04/03/2019] [Accepted: 04/03/2019] [Indexed: 10/27/2022]
Abstract
In this study, an effective electrochemical sensor was developed for heparin detection using a protamine-conjugated graphene oxide/gold (GO/Au) composite. Protamine is an antidote that can act as an affinity ligand for heparin. The GO was used as support for signal amplification, and Au nanoparticles (NPs) were employed to immobilize the protamine. This Au NPs also increasing the electron transfer rate and enhancing the signal response during protamine-heparin integration. The proposed affinity sensor had a simple fabrication process, a low detection limit (0.9 nM), a wide linear range (1.9 × 10-7 M to 1.5 × 10-9 M), high stability, and high selectivity in the detection of heparin.
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Affiliation(s)
- Arunkumar Rengaraj
- Department of Biological Engineering, Biohybrid Systems Research Center (BSRC), Inha University, Incheon 22212, Republic of Korea
| | - Yuvaraj Haldorai
- Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul 100-715, Republic of Korea; Department of Nanoscience and Technology, Bharathiar University, Coimbatore 641046, Tamilnadu, India
| | - Seoung Kyu Hwang
- Department of Biological Engineering, Biohybrid Systems Research Center (BSRC), Inha University, Incheon 22212, Republic of Korea
| | - Eunseon Lee
- Animal Production Research and Development Division, National Institute of Animal Science, Republic of Korea
| | - Mi-Hwa Oh
- Animal Production Research and Development Division, National Institute of Animal Science, Republic of Korea
| | - Tae-Joon Jeon
- Department of Biological Engineering, Biohybrid Systems Research Center (BSRC), Inha University, Incheon 22212, Republic of Korea
| | - Young-Kyu Han
- Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul 100-715, Republic of Korea.
| | - Yun Suk Huh
- Department of Biological Engineering, Biohybrid Systems Research Center (BSRC), Inha University, Incheon 22212, Republic of Korea.
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18
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Liu S, Chen C, Zhang D, Dong G, Zheng D, Jiang Y, Zhou G, Liu JM, Kempa K, Gao J. Recyclable and Flexible Starch-Ag Networks and Its Application in Joint Sensor. NANOSCALE RESEARCH LETTERS 2019; 14:127. [PMID: 30953267 PMCID: PMC6450995 DOI: 10.1186/s11671-019-2957-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 03/25/2019] [Indexed: 06/09/2023]
Abstract
Flexible transparent conductive electrodes are essential component for flexible optoelectronic devices and have been extensively studied in recent years, while most of the researches are focusing on the electrode itself, few topics in material green and recyclability. In this paper, we demonstrate a high-performance transparent conductive electrode (TCE), based on our previous cracking technology, combined with a green and recyclable substrate, a starch film. It not only shows low Rs (less than 1.0 Ω sq-1), high transparency (> 82%, figure of merit ≈ 10,000), but also provides an ultra-smooth morphology and recyclability. Furthermore, a series of biosensors on human joints are demonstrated, showing great sensitivity and mechanical stability.
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Affiliation(s)
- Sai Liu
- Institute for Advanced Materials, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006 China
| | - Cong Chen
- Institute for Advanced Materials, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006 China
| | - Dongwei Zhang
- Institute for Advanced Materials, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006 China
| | - Guanping Dong
- Institute for Advanced Materials, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006 China
- School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, 510640 China
| | - Dongfeng Zheng
- Institute for Advanced Materials, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006 China
| | - Yue Jiang
- Institute for Advanced Materials, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006 China
| | - Guofu Zhou
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006 China
| | - Jun-Ming Liu
- Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093 China
| | - Krzysztof Kempa
- Department of Physics, Boston College, Chestnut Hill, MA 02467 USA
| | - Jinwei Gao
- Institute for Advanced Materials, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006 China
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19
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Ren X, An M. Theoretical and experimental studies of the influence of gold ions and DMH on cyanide-free gold electrodeposition. RSC Adv 2018; 8:2667-2677. [PMID: 35541452 PMCID: PMC9077390 DOI: 10.1039/c7ra13115a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 01/02/2018] [Indexed: 12/23/2022] Open
Abstract
Quantum chemical calculations based on density functional theory (DFT) were employed to determine an appropriate gold source for gold electroplating and to ascertain the stable structures of gold-complexes in cyanide-free electrolyte. Based on the charge distribution of 5,5-dimethylhydantoin (DMH) and the bonding energy of gold complexes, Au3+ is the appropriate gold source for DMH-based gold electroplating electrolyte to get greater cathodic polarization and [Au(DMH)4]− with 2N(4)–Au coordination structure is the most stable form of gold ion in the electrolyte. The influence of DMH, used as the complexing agent, on electrochemical behaviors was investigated using cathodic polarization, cyclic voltammetry, and chronoamperometry measurements. With DMH as the complexing agent, the cathodic polarization of gold electrodeposition was significantly enhanced. DMH concentration was determined as 0.30 mol L−1 based on the investigation of the influence of the DMH concentration on cathodic polarization and gold electrodeposit micromorphology. The kinetic features based on cyclic voltammogram measurements revealed that the electrodeposition was an irreversible process under diffusion control with 0.30 mol L−1 DMH as the complexing agent. The ion and electron transfers were obviously inhibited by DMH. The gold electrodeposition process displayed progressive nucleation according to the Scharifker and Hills nucleation model with various applied potentials. The growth rate of the crystal nucleus was reduced by DMH and promoted by a negative shift of Eap. Au3+ is the appropriate gold source for the DMH-based gold electroplating electrolyte to get greater cathodic polarization.![]()
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Affiliation(s)
- Xuefeng Ren
- School of Food and Environment
- Dalian University of Technology
- Panjin
- China
| | - Maozhong An
- State Key Laboratory of Urban Water Resource and Environment
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin
- China
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20
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Luo G, Yuan G, Li N. Cyanide-free electrolyte for Au( iii) and Au( i) electrodepositing using DMH as complexing agent. RSC Adv 2016. [DOI: 10.1039/c6ra10418e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
A novel cyanide-free electrolyte is reported for electrodepositing bright gold layers from a solution of both Au(iii) and Au(i).
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Affiliation(s)
- Gong Luo
- Department of Applied Chemistry
- Harbin Institute of Technology
- Harbin 150001
- China
| | - Guohui Yuan
- Department of Applied Chemistry
- Harbin Institute of Technology
- Harbin 150001
- China
| | - Ning Li
- Department of Applied Chemistry
- Harbin Institute of Technology
- Harbin 150001
- China
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21
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Ren X, Song Y, Liu A, Zhang J, Yang P, Zhang J, Yuan G, An M, Osgood H, Wu G. Role of polyethyleneimine as an additive in cyanide-free electrolytes for gold electrodeposition. RSC Adv 2015. [DOI: 10.1039/c5ra12217a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Study of the influence of polyethyleneimine on the cyanide-free gold nucleation process and morphology of gold electrodeposits.
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