A comparison of the electrochemical and photoelectrochemical behaviors of three biosensors, based on the use of Au, CdS, and ZnS nanoparticles-glucose oxidase (GOD) system, is discussed. All the nanoparticles were electrodeposited onto the indium tin oxide (ITO) thin film coated glass surface. GOD was then immobilized on the nanoparticles-modified electrodes surface with the sol-gel technique. The deposited nanoparticles on ITO electrodes were characterized by scanning electron microscopy, UV-vis spectroscopy and electrochemical impedance spectra. The direct electrochemistry of GOD, analytical performance of glucose calibration curves and the kinetic parameters of the enzyme reaction were compared for all the electrochemical biosensors. Furthermore, the current response of the quantum dots-GOD system biosensor can be increased after illumination. The electrochemical and photoelectrochemical biosensors based on ZnS nanostructures exhibited higher sensitivity than that of Au or CdS nanostructures. Considering ZnS is nontoxic to human and environment, the results suggest that ZnS nanoparticles-GOD system seems to be a promising platform for fabrication of novel electrochemical and photoelectrochemical biosensors.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.bios.2012.04.044 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Visible Light-Driven Excited-State Copper-BINAP Catalysis for Accessing Diverse Chemical Reactions.
Chem Catal
November 2024
Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States.
The use of visible light to drive chemical transformations has a history spanning over a century. However, the development of photo-redox catalysts to efficiently harness light energy is a more recent advancement, evolving over the past two decades. While ruthenium and iridium-based photocatalysts dominate due to their photostability, long excited-state lifetimes, and high redox potentials, concerns about sustainability and cost have shifted attention to first-row transition metals.
View Article and Find Full Text PDFShadow Effect-Triggered Photosensitive Gate of Organic Photoelectrochemical Transistor for Enhanced Biodetection.
Anal Chem
December 2024
School of Materials, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong 518107, P. R. China.
The integration of a photosensitive gate into an organic electrochemical transistor has currently emerged as a promising route for biological sensing. However, the modification of the photosensitive gate always involves complex processes, and the degradation of sensitivity of the functional materials under illumination will significantly decrease the stability of the devices. Herein, we designed an organic photoelectrochemical transistor (OPECT) biosensor employing horseradish peroxidase (HRP)@glucose oxidase (GOx)/Pt/n-Si as the photosensitive gate based on the "shadow effect".
View Article and Find Full Text PDFSolution-processed nickel oxide passivation on large-area silicon electrodes for efficient photoelectrochemical water splitting.
RSC Adv
December 2024
School of Materials Science and Engineering, Gwangju Institute of Science and Technology 123 Cheomdangwagi-ro, Buk-gu Gwangju 61005 Republic of Korea
Photoelectrochemical water splitting is a promising technology for converting solar energy into chemical energy. For this system to be practically viable, the materials and processes employed for photoelectrode fabrication should be cost-effective and scalable. Herein, we report the large-scale fabrication of nickel oxide-coated n-type silicon (n-Si) photoanodes chemical bath deposition for efficient photoelectrochemical water oxidation.
View Article and Find Full Text PDFNickel-based cocatalysts on Titanium-doped Hematite empower direct photoelectrochemical valorisation of 5-Hydroxymethylfurfural.
ChemSusChem
December 2024
University of Bologna, Physics and Astronomy, v.le Berti-Pichat 6/2, 40127, Bologna, ITALY.
The photoelectrochemical oxidation of 5-hydroxymethylfurfural (HMF), a biomass-derived intermediate, to 2,5-furandicarboxylic acid (FDCA), a key building block for industrial applications, is a well-studied anodic reaction. This photoelectrochemical (PEC) conversion typically requires an electron mediator, such as TEMPO, regardless of the semiconductor used. Various electrocatalysts can also perform this reaction electrochemically, without additional organic species in the electrolyte.
View Article and Find Full Text PDFOrganic photoelectrochemical transistor based on titanium dioxide nanorods for detection of Microcystin-LR.
Talanta
December 2024
Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China. Electronic address:
A more efficient signal amplification strategy is needed to improve the performance of promising photoelectrochemical sensors (PEC). Organic photoelectrochemical transistor (OPECT) sensors are of growing interest in many fields, but their potential has not yet been widely exploited and remains a challenge. In this study, a novel organic photoelectrochemical transistor aptamer (OPECT) biosensor combining photoelectrochemical analysis and organic electrochemical transistor with AgI-TiO (AgI-TNs) as photoreactive material and target-specific DNA chain reaction hybridization as signal amplifier for microcystin-LR detection was developed.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!