Multifunctional Nickel Phosphate Nano/Microflakes 3D Electrode for Electrochemical Energy Storage, Nonenzymatic Glucose, and Sweat pH Sensors

Padmanathan, N.; Shao, Han; Razeeb, Kafil M.

doi:10.1021/acsami.7b17187

Cited by 128 publications

(72 citation statements)

References 71 publications

(153 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast, most of the existing cobalt-based catalysts that are used for non-enzymatic sensing of Glu require strong alkaline conditions. 23,39,41,42 Furthermore, while some other metal phosphate systems (e.g., Ni 3 (PO4) 2 -based materials 66 ) have shown greater sensitivity for glucose detection than our currently reported materials, the detection range was investigated below the typical glucose concentration of human blood (i.e., <1 mM), and measurements were also performed in strongly alkaline conditions (1 M NaOH solutions). Figure S8 shows the amperometric responsiveness of commercial Co 3 (PO 4 ) 2 powder-based electrode for the electrooxidation of Glu.…”

Section: Acs Applied Materialsmentioning

confidence: 99%

Cobalt Phosphate Nanostructures for Non-Enzymatic Glucose Sensing at Physiological pH

Tomanin

Cherepanov

Besford

et al. 2018

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Nanostructured materials have great potential as platforms for analytical assays and catalytic reactions. Herein, we report the synthesis of electrocatalytically active cobalt phosphate nanostructures (CPNs) using a simple, low-cost, and scalable preparation method. The electrocatalytic properties of the CPNs toward the electrooxidation of glucose (Glu) were studied by cyclic voltammetry and chronoamperometry in relevant biological electrolytes, such as phosphate-buffered saline (PBS), at physiological pH (7.4). Using the CPNs, Glu detection could be achieved over a wide range of biologically relevant concentrations, from 1 to 30 mM Glu in PBS, with a sensitivity of 7.90 nA/mM cm 2 and a limit of detection of 0.3 mM, thus fulfilling the necessary requirements for human blood Glu detection. In addition, the CPNs showed a high structural and functional stability over time at physiological pH. The CPN-coated electrodes could also be used for Glu detection in the presence of interfering agents (e.g., ascorbic acid and dopamine) and in human serum. Density functional theory calculations were performed to evaluate the interaction of Glu with different faceted cobalt phosphate surfaces; the results revealed that specific surface presentations of undercoordinated cobalt led to the strongest interaction with Glu, suggesting that enhanced detection of Glu by the CPNs can be achieved by lowering the surface coordination of cobalt.Our results highlight the potential use of phosphate-based nanostructures as catalysts for electrochemical sensing of biochemical analytes.Potassium chloride (KCl, CAS no. 7440-09-7) was purchased from Chem-Supply. All the chemicals were used as received. High purity (Milli-Q) water with a resistivity of 18.2 MΩ cm was obtained from an inline Millipore RiOs/Origin water purification system.Instrumentation. X-ray photoelectron spectroscopy (XPS) spectra were acquired using an Axis Ultra X-ray photoelectron spectrometer (Kratos Analytical, UK), equipped with a 165 mm concentric hemispherical electron energy analyzer and a monochromated Al Kα incident Xray source (1486.6 eV). Survey (wide) scans were recorded in the binding energy range of 0-1200 eV, with 1.0 eV steps, a dwell time of 100 ms, and an analyzer pass energy of 160 eV.Multiplex (narrow) high-resolution spectra were recorded with a pass energy of 20 eV, with 0.05 eV steps, and a dwell time of 250 ms, resulting in an energy resolution (ΔE/E) of ~300 meV. The base pressure in the analysis chamber during data collection was 1-2 × 10 −9 mbar, and these data were processed using the software CasaXPS. All binding energies were calibrated using the C 1s level of adventitious carbon at 285.0 eV. Fourier transform infrared (FTIR) spectra were obtained on a Tensor II (Bruker) attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectrometer and analyzed using the software OPUS 7.8. The number of scans was 64. A minimum resolution of 4 cm −1 and the absorbance/transmittance mode were used. Scanning electron microscopy (SEM) images were o...

show abstract

Section: Acs Applied Materialsmentioning

confidence: 99%

Cobalt Phosphate Nanostructures for Non-Enzymatic Glucose Sensing at Physiological pH

Tomanin

Cherepanov

Besford

et al. 2018

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…The value of the slope (log v vs log I pa ) can also be used to analyze the kinetic process of the electrochemical reaction and 0.5 was considered a typical diffusion-controlled process. 35,36 Therefore, both the results indicated that a diffusion-controlled process occurred on the Au@NiO-2 electrodes in the glucose oxidation reaction. The charge transfer coefficient (α) can be obtained by analyzing the Tafel plot of E p vs. log I.…”

Section: Resultsmentioning

confidence: 78%

Electrodeposition of Au@NiO Nanotube Arrays for Highly Sensitive Non-enzymatic Glucose Sensing

Zhou

Yin

Zhao

et al. 2021

J. Electron. Mater.

View full text Add to dashboard Cite

Au@NiO nanotube arrays were prepared on carbon paper through orderly electrodeposition of ZnO nanorods, Au and NiO, followed by removing ZnO. The morphology and composition of the nanotubes were characterized using scanning electron microscopy, transmission electron microscopy, x-ray diffractometry and x-ray photoelectron spectroscopy. Cyclic voltammetry and amperometric detection were applied to analyze the electrochemical performance of the obtained materials. The Au@NiO nanotubes displayed highly improved electrocatalytic activity for glucose oxidation than that of NiO nanotubes. The optimized Au@NiO nanotube arrays demonstrated excellent glucose sensing performance with a high sensitivity of 5536.2 μA mM −1 cm −2 , a wide linear range of 1-6000 μM and a lower detection limit of 0.25 μM. In addition, the Au@ NiO nanotube sensors also revealed the good feasibility of glucose detection for real serum samples. The enhanced glucose sensing performance of Au@NiO nanotubes may be due to the bifunctional effect of Au (increasing the charge transfer and acting as direct electrocatalyst for glucose oxidation). The electrodeposition of the Au@NiO nanotube arrays may provide a promising strategy for preparing non-enzymatic glucose sensing materials.

show abstract

“…After the rest, the human subject continued to exercise, the AlGaN/GaN HEMT was again exposed to sweat, and the concentrations of H + and K + increased again. The pH of the subject during the two indoor cycles was in the range of 4–6.8 , and the K + concentration was approximately 5 mM , which is in the normal physiological range. This experiment also verified that AlGaN/GaN HEMTs can be used for wearability.…”

Section: Resultsmentioning

confidence: 99%

Wearable Multiparameter Platform Based on AlGaN/GaN High‐electron‐mobility Transistors for Real‐time Monitoring of pH and Potassium Ions in Sweat

et al. 2019

View full text Add to dashboard Cite

Biosensors based on field‐effect transistor (FET) structures have attracted considerable attention because they offer rapid, inexpensive parallel sensing and ultrasensitive label‐free detection. However, long‐term repeatable detection cannot be performed, and Ag/AgCl reference electrode design is complicated, which has hindered FET biosensors from becoming truly wearable health‐monitoring platforms. In this paper, we propose a novel wearable detection platform based on AlGaN/GaN high‐electron‐mobility transistors (HEMTs). In this platform, a sweatband was used to continuously collect sweat, and a pH detecting unit and a potassium ion detecting unit were formed by modifying different sensitive films to realize the long‐term stable and repeatable detection of pH and potassium ions. Experimental data show that the wearable detection platform based on AlGaN/GaN HEMTs has good sensitivity (pH 3–7 sensitivity is 45.72 μA/pH; pH 7.4–9 sensitivity is 51.073 μA/pH; and K+ sensitivity is 4.94 μA/lgαK+), stability (28 days) and repeatability (the relative standard deviation (RSD) of pH 3–7 sensitivity is 2.6 %, the RSD of pH 7.4–9 sensitivity is 2.1 %, and the RSD of K+ sensitivity is 7.3 %). Our newly proposed wearable platform has excellent potential for predictive analytics and personalized medical treatment.

show abstract

Multifunctional Nickel Phosphate Nano/Microflakes 3D Electrode for Electrochemical Energy Storage, Nonenzymatic Glucose, and Sweat pH Sensors

Cited by 128 publications

References 71 publications

Cobalt Phosphate Nanostructures for Non-Enzymatic Glucose Sensing at Physiological pH

Cobalt Phosphate Nanostructures for Non-Enzymatic Glucose Sensing at Physiological pH

Electrodeposition of Au@NiO Nanotube Arrays for Highly Sensitive Non-enzymatic Glucose Sensing

Wearable Multiparameter Platform Based on AlGaN/GaN High‐electron‐mobility Transistors for Real‐time Monitoring of pH and Potassium Ions in Sweat

Contact Info

Product

Resources

About