scholarly journals Au nanoparticles modified CuO nanowire electrode based non-enzymatic glucose detection with improved linearity

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Ashwini Kumar Mishra ◽  
Deepak Kumar Jarwal ◽  
Bratindranath Mukherjee ◽  
Amit Kumar ◽  
Smrity Ratan ◽  
...  
Keyword(s):  
Copper Foil ◽  
Au Nanoparticles ◽  
Volume Ratio ◽  
Glucose Detection ◽  
Effective Surface ◽  
Tem Analysis ◽  
Oxide Nanowires ◽  
Low Glucose ◽  
Cuo Nanowire ◽  
Sugar Levels

Abstract This paper explores gold nanoparticle (GNP) modified copper oxide nanowires(CuO NWs)based electrode grown on copper foil for non-enzymatic glucose detection in a wide linear ranging up to 31.06 mM, and 44.36 mM at 0.5 M NaOH and 1 M NaOH concentrations. The proposed electrode can be used to detect a very low glucose concentration of 0.3 µM with a high linearity range of 44.36mM and sensitivity of 1591.44 µA mM−1 cm−2. The electrode is fabricated by first synthesizing Cu (OH)2 NWs on a copper foil by chemical etching method and then heat treatment is performed to convert Cu (OH)2 NWs into CuO NWs. The GNPs are deposited on CuO NWs to enhance the effective surface-to-volume ratio of the electrode with improved catalytic activity. The surface morphology has been investigated by XRD, XPS, FE-SEM and HR-TEM analysis. The proposed sensor is expected to detect low-level of glucose in urine, and saliva. At the same time, it can also be used to measure extremely high sugar levels (i.e. hyperglycemia) of ~ 806.5454 mg/dl. The proposed sensor is also capable of detecting glucose after multiple bending of the GNP modified CuO NWs electrode. The proposed device is also used to detect the blood sugar level in human being and it is found that this sensor’s result is highly accurate and reliable.

scholarly journals Author Correction: Au nanoparticles modified CuO nanowire electrode based non-enzymatic glucose detection with improved linearity

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Ashwini Kumar Mishra ◽  
Deepak Kumar Jarwal ◽  
Bratindranath Mukherjee ◽  
Amit Kumar ◽  
Smrity Ratan ◽  
...  
Keyword(s):  
Au Nanoparticles ◽  
Glucose Detection ◽  
Cuo Nanowire

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

scholarly journals Superficial fabrication of gold nanoparticles modified CuO nanowires electrode for non-enzymatic glucose detection

RSC Advances ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 1772-1781 ◽  
Author(s):  
Ashwini Kumar Mishra ◽  
Bratindranath Mukherjee ◽  
Amit Kumar ◽  
Deepak Kumar Jarwal ◽  
Smrity Ratan ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Copper Oxide ◽  
Copper Foil ◽  
Au Nanoparticles ◽  
Low Cost ◽  
Glucose Detection ◽  
Cuo Nanowires

This paper describes a low-cost facile method to construct gold (Au) nanoparticles (NPs) modified copper oxide (CuO) nanowires (NWs) electrode on copper foil for the detection of glucose.

DNA as a linker for biocatalytic deposition of Au nanoparticles on graphene and its application in glucose detection

2011 ◽  
Vol 21 (34) ◽  
pp. 12873 ◽  
Author(s):  
Jianbin Zheng ◽  
Yaping He ◽  
Qinglin Sheng ◽  
Hongfang Zhang
Keyword(s):  
Au Nanoparticles ◽  
Glucose Detection

Synthesis of Au Nanoparticles Attached to Large-Area Cu-Oxide Nanowires By Thermal Treatment for Artificial Photosynthesis Process

2020 ◽  
Vol MA2020-01 (39) ◽  
pp. 1695-1695
Author(s):  
Jose Fernando Canto-Olvera ◽  
Oscar E. Cigarroa-Mayorga ◽  
Angel Guillen-Cervantes
Keyword(s):  
Thermal Treatment ◽  
Artificial Photosynthesis ◽  
Au Nanoparticles ◽  
Large Area ◽  
Oxide Nanowires

scholarly journals Novel amperometric glucose biosensor based on MXene nanocomposite

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
R. B. Rakhi ◽  
Pranati Nayak ◽  
Chuan Xia ◽  
Husam N. Alshareef
Keyword(s):  
Au Nanoparticles ◽  
Synergistic Effects ◽  
High Sensitivity ◽  
Glucose Biosensor ◽  
Glucose Detection ◽  
Carbon Electrode ◽  
Potential Candidate ◽  
Amperometric Response ◽  
Excellent Stability ◽  
Electrochemical Transducer

Abstract A biosensor platform based on Au/MXene nanocomposite for sensitive enzymatic glucose detection is reported. The biosensor leverages the unique electrocatalytic properties and synergistic effects between Au nanoparticles and MXene sheets. An amperometric glucose biosensor is fabricated by the immobilization of glucose oxidase (GOx) enzyme on Nafion solubilized Au/ MXene nanocomposite over glassy carbon electrode (GCE). The biomediated Au nanoparticles play a significant role in facilitating the electron exchange between the electroactive center of GOx and the electrode. The GOx/Au/MXene/Nafion/GCE biosensor electrode displayed a linear amperometric response in the glucose concentration range from 0.1 to 18 mM with a relatively high sensitivity of 4.2 μAmM−1 cm−2 and a detection limit of 5.9 μM (S/N = 3). Furthermore, the biosensor exhibited excellent stability, reproducibility and repeatability. Therefore, the Au/MXene nanocomposite reported in this work is a potential candidate as an electrochemical transducer in electrochemical biosensors.

Catalytic Activity and Physical Properties of Nanoparticles Metal Supported on Bentonite for Hydrogenolysis of Glycerol

2011 ◽  
Vol 364 ◽  
pp. 211-216
Author(s):  
Noraini Hamzah ◽  
Wan Nor Roslam Wan Isahak ◽  
Nadia Farhana Adnan ◽  
Nor Asikin Mohamad Nordin ◽  
Mohamad Bin Kassim ◽  
...  
Keyword(s):  
High Activity ◽  
Hydrogen Pressure ◽  
Au Nanoparticles ◽  
Catalyst System ◽  
Impregnation Method ◽  
Tem Analysis ◽  
Glycerol Hydrogenolysis ◽  
Initial Hydrogen Pressure ◽  
Catalyst Acidity ◽  
Average Size

Catalysts prepared from a variety of noble metal (Os, Ru, Pd and Au) supported on bentonite using impregnation method were studied and it found these series catalyst system gave different activity and selectivity. Among these catalysts, Os/bentonite and Ru/bentonite catalyst showed high activity in glycerol hydrogenolysis reaction at 150°C, 2.0 MPa initial hydrogen pressure for 7 hours. TEM analysis revealed that these nanometal particles catalyst have different in size and result showed that Os and Ru which have smaller average size in range 1-3 nm gave high activity which are 54.1% and 61.2% respectively. In contrast, less activity was obtained when using Pd/bentonite (29.0%) and Au/bentonite (27.8%) catalyst and TEM result showed that Pd and Au nanoparticles have large average particles size (8-10) nm. NH3-TPD analysis revealed that Ru/bentonite and Os/bentonite catalyst gave high total acidity and this behaviour contribute to high activity of the catalyst. This study revealed that size of nanoparticles and catalyst acidity play an important role in the activity and selectivity in glycerol hydrogenolysis reaction. These catalysts were also characterized by BET, XRD and XPS in order to get some physicochemical properties of the catalyst.

Au nanoparticles decorated CuO nanowire arrays with enhanced photocatalytic properties

2013 ◽  
Vol 108 ◽  
pp. 41-45 ◽  
Author(s):  
Yanlong Yu ◽  
Yanyan Zhao ◽  
Hongyu Sun ◽  
Mashkoor Ahmad
Keyword(s):  
Au Nanoparticles ◽  
Nanowire Arrays ◽  
Photocatalytic Properties ◽  
Cuo Nanowire

scholarly journals Ion-specific Adsorption on Bare Gold (Au) Nanoparticles in aqueous Solution: Double-Layer Structure and Surface Potentials

2020 ◽  
Author(s):  
Zhujie Li ◽  
Victor G. Ruiz ◽  
Matej Kanduč ◽  
Joachim Dzubiella
Keyword(s):  
Au Nanoparticles ◽  
Layer Structure ◽  
Electrolyte Solutions ◽  
Electrostatic Potentials ◽  
Surface Charges ◽  
Effective Surface ◽  
Surface Potentials ◽  
Adsorption Structure ◽  
Highly Oscillatory ◽  
Bare Gold

We study the solvation and electrostatic properties of bare gold (Au) nanoparticles (NPs) of 1-2 nm in size in aqueous electrolyte solutions of sodium salts of various anions with large physicochemical diversity (Cl<sup>-</sup>, BF<sub>4</sub><sup>-</sup>, PF<sub>6</sub><sup>-</sup>, Nip<sup>-</sup>(nitrophenolate), 3- and 4-valent hexacyanoferrate (HCF)) using nonpolarizable, classical molecular dynamics computer simulations. We find a substantial facet selectivity in the adsorption structure and spatial distribution of the ions at the Au-NPs: while sodium and some of the anions (e.g., Cl<sup>-</sup>, HCF<sup>3-</sup>) adsorb more at the `edgy' (100) and (110) facets of the NPs, where the water hydration structure is more disordered, other ions (e.g., BF<sub>4</sub><sup>-</sup>, PF<sub>6</sub><sup>-</sup>, Nip<sup>-</sup>) prefer to adsorb strongly on the extended and rather flat (111) facets. In particular, Nip<sup>-</sup>, which features an aromatic ring in its chemical structure, adsorbs strongly and perturbs the first water monolayer structure on the NP (111) facets substantially. Moreover, we calculate adsorptions, radially-resolved electrostatic potentials, as well as the far-field <i>effective</i> electrostatic surface charges and potentials by mapping the long-range decay of the calculated electrostatic potential distribution onto the standard Debye-Hückel form. We show how the extrapolation of these values to other ionic strengths can be performed by an analytical Adsorption-Grahame relation between effective surface charge and potential. We find for all salts negative effective surface potentials in the range from -10 mV for NaCl down to about -80 mV for NaNip, consistent with typical experimental ranges for the zeta-potential. We discuss how these values depend on the surface definition and compare them to the explicitly calculated electrostatic potentials near the NP surface, which are highly oscillatory in the ± 0.5 V range. <br>

scholarly journals Ion-specific Adsorption on Bare Gold (Au) Nanoparticles in aqueous Solution: Double-Layer Structure and Surface Potentials

2020 ◽  
Author(s):  
Zhujie Li ◽  
Victor G. Ruiz ◽  
Matej Kanduč ◽  
Joachim Dzubiella
Keyword(s):  
Au Nanoparticles ◽  
Layer Structure ◽  
Electrolyte Solutions ◽  
Electrostatic Potentials ◽  
Surface Charges ◽  
Effective Surface ◽  
Surface Potentials ◽  
Adsorption Structure ◽  
Highly Oscillatory ◽  
Bare Gold

We study the solvation and electrostatic properties of bare gold (Au) nanoparticles (NPs) of 1-2 nm in size in aqueous electrolyte solutions of sodium salts of various anions with large physicochemical diversity (Cl<sup>-</sup>, BF<sub>4</sub><sup>-</sup>, PF<sub>6</sub><sup>-</sup>, Nip<sup>-</sup>(nitrophenolate), 3- and 4-valent hexacyanoferrate (HCF)) using nonpolarizable, classical molecular dynamics computer simulations. We find a substantial facet selectivity in the adsorption structure and spatial distribution of the ions at the Au-NPs: while sodium and some of the anions (e.g., Cl<sup>-</sup>, HCF<sup>3-</sup>) adsorb more at the `edgy' (100) and (110) facets of the NPs, where the water hydration structure is more disordered, other ions (e.g., BF<sub>4</sub><sup>-</sup>, PF<sub>6</sub><sup>-</sup>, Nip<sup>-</sup>) prefer to adsorb strongly on the extended and rather flat (111) facets. In particular, Nip<sup>-</sup>, which features an aromatic ring in its chemical structure, adsorbs strongly and perturbs the first water monolayer structure on the NP (111) facets substantially. Moreover, we calculate adsorptions, radially-resolved electrostatic potentials, as well as the far-field <i>effective</i> electrostatic surface charges and potentials by mapping the long-range decay of the calculated electrostatic potential distribution onto the standard Debye-Hückel form. We show how the extrapolation of these values to other ionic strengths can be performed by an analytical Adsorption-Grahame relation between effective surface charge and potential. We find for all salts negative effective surface potentials in the range from -10 mV for NaCl down to about -80 mV for NaNip, consistent with typical experimental ranges for the zeta-potential. We discuss how these values depend on the surface definition and compare them to the explicitly calculated electrostatic potentials near the NP surface, which are highly oscillatory in the ± 0.5 V range. <br>

scholarly journals Equilibrium shape of core(Fe)–shell(Au) nanoparticles as a function of the metals volume ratio

2020 ◽  
Vol 128 (5) ◽  
pp. 055307 ◽  
Author(s):  
A. Ponchet ◽  
S. Combettes ◽  
P. Benzo ◽  
N. Tarrat ◽  
M. J. Casanove ◽  
...  
Keyword(s):  
Au Nanoparticles ◽  
Equilibrium Shape ◽  
Volume Ratio
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