Periodic nanostructured Au arrays on an Si electrode for high-performance electrochemical detection of hydrogen peroxide without an enzyme

2016 ◽  
Vol 4 (41) ◽  
pp. 9864-9871 ◽  
Author(s):  
Yiqiang Sun ◽  
Lifeng Hang ◽  
Dandan Men ◽  
Huilin Li ◽  
Dilong Liu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Electrochemical Detection ◽  
Silicon Substrate ◽  
Electrochemical Method ◽  
High Performance ◽  
Planar Silicon ◽  
Gold Nanosphere

Periodic gold nanosphere arrays were prepared on a planar silicon substrate, which could be directly developed as an electrode to sensitively and selectively detect H2O2 without an enzyme via an electrochemical method.

scholarly journals 2D MoS2 Encapsulated Silicon Nanopillar Array with High-Performance Light Trapping Obtained by Direct CVD Process

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 267
Author(s):  
Minyu Bai ◽  
Zhuoman Wang ◽  
Jijie Zhao ◽  
Shuai Wen ◽  
Peiru Zhang ◽  
...  
Keyword(s):  
Silicon Substrate ◽  
High Performance ◽  
Low Cost ◽  
Light Trapping ◽  
Incident Light ◽  
Single Layer ◽  
Chemical Vapor ◽  
Optoelectronic Device ◽  
Planar Silicon ◽  
Shortwave Infrared

Weak absorption remains a vital factor that limits the application of two-dimensional (2D) materials due to the atomic thickness of those materials. In this work, a direct chemical vapor deposition (CVD) process was applied to achieve 2D MoS2 encapsulation onto the silicon nanopillar array substrate (NPAS). Single-layer 2D MoS2 monocrystal sheets were obtained, and the percentage of the encapsulated surface of NPAS was up to 80%. The reflection and transmittance of incident light of our 2D MoS2-encapsulated silicon substrate within visible to shortwave infrared were significantly reduced compared with the counterpart planar silicon substrate, leading to effective light trapping in NPAS. The proposed method provides a method of conformal deposition upon NPAS that combines the advantages of both 2D MoS2 and its substrate. Furthermore, the method is feasible and low-cost, providing a promising process for high-performance optoelectronic device development.

High-performance non-enzymatic perovskite sensor for hydrogen peroxide and glucose electrochemical detection

2017 ◽  
Vol 244 ◽  
pp. 482-491 ◽  
Author(s):  
Juan He ◽  
Jaka Sunarso ◽  
Yinlong Zhu ◽  
Yijun Zhong ◽  
Jie Miao ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Electrochemical Detection ◽  
High Performance

Simple, sensitive assay of polyamines by high-performance liquid chromatography with electrochemical detection after post-column reaction with immobilized polyamine oxidase.

1989 ◽  
Vol 35 (8) ◽  
pp. 1694-1696 ◽  
Author(s):  
K Maruta ◽  
R Teradaira ◽  
N Watanabe ◽  
T Nagatsu ◽  
M Asano ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Electrochemical Detection ◽  
High Performance ◽  
Immobilized Enzyme ◽  
Platinum Electrode ◽  
Reversed Phase ◽  
Polyamine Oxidase ◽  
Soybean Seedlings ◽  
Liquid Chromatographic ◽  
Urinary Polyamines

Abstract This simple, rapid liquid-chromatographic assay of urinary polyamines (putrescine, spermidine, spermine, and cadaverine) involves electrochemical detection with a post-column immobilized enzyme, polyamine oxidase (EC 1.4.3.6) from soybean seedlings. Polyamines are separated by isocratic ion-pairing reversed-phase chromatography, then enzymatically converted, with release of hydrogen peroxide, via the post-column reactor with immobilized polyamine oxidase; the hydrogen peroxide is detected by electrochemical oxidation on a platinum electrode. The detection limits for injected putrescine, spermidine, and spermine were 0.3, 0.5, 0.6, and 4 pmol, respectively, with linear ranges of two to three orders of magnitude. Reproducibility was also good, with CV values less than 7%. The efficiency of the immobilized enzyme column was not decreased after analysis of 300 urine samples. Putrescine and spermidine excretion in urine from patients with blood cancers and solid cancers was significantly increased.

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