A review on visible-light induced photoelectrochemical sensors based on CdS nanoparticles

Discovering the distinctive photophysical properties of semiconductor nanoparticles (NPs) has made these a popular subject in recent advances in nanotechnology-related analytical methods. Semiconductor NPs are well-known materials that have been widely used in photovoltaic devices such as optical se...

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Published inJournal of materials chemistry. B, Materials for biology and medicine Vol. 6; no. 28; pp. 4551 - 4568
Main Authors Ibrahim, Izwaharyanie, Lim, Hong Ngee, Mohd Zawawi, Ruzniza, Ahmad Tajudin, Asilah, Ng, Yun Hau, Guo, Hang, Huang, Nay Ming
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 2018
Subjects
analytical methods
Carrier recombination
Charge materials
chemical species
chemistry
Current carriers
Dye-sensitized solar cells
Electrical properties
Energy gap
light emitting diodes
Medical imaging
Molecular chains
Nanoparticles
Nanotechnology
Optical measuring instruments
Optical properties
Organic chemistry
Organic light emitting diodes
photons
photosensitizing agents
Photovoltaic cells
Photovoltaics
probability
Quantum dots
Recombination
semiconductors
Sensors
Solar cells
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ISSN2050-750X
2050-7518
2050-7518
DOI10.1039/c8tb00924d

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Summary:Discovering the distinctive photophysical properties of semiconductor nanoparticles (NPs) has made these a popular subject in recent advances in nanotechnology-related analytical methods. Semiconductor NPs are well-known materials that have been widely used in photovoltaic devices such as optical sensors and bioimaging, and dye-sensitized solar cells (DSSCs), as well as for light-emitting diodes (LEDs). The use of a narrow-bandgap semiconductor such as CdS NPs in the photoelectrochemical (PEC) detection of chemicals and biological molecules plays a key role as a photosensitizer and promotes some specific advantages in light-harvesting media. Their size-controlled optical and electrical properties make NPs fascinating and promising materials for a variety of nanoscale photovoltaic devices. Moreover, charge injection from the narrow bandgap to the adjacent material leads to efficient charge separation and prolongs the electron lifetime by the elimination of the charge carrier recombination probability. In this regard, a single photon enables the production of multiple photogenerated charge carriers in CdS NPs, which subsequently boosts the effectiveness of the photovoltaic devices. In particular, the present review article highlights the recent emerging PEC detection methods based on CdS NPs, specifically related to the direct and indirect interactions of NPs with target analytes. The current opportunities and challenges in achieving real-world applications of CdS-based PEC sensing are also presented. Discovering the distinctive photophysical properties of semiconductor nanoparticles (NPs) has made these a popular subject in recent advances in nanotechnology-related analytical methods.
Bibliography:Asilah Ahmad Tajudin received her PhD from Lund University, Sweden. She is currently a senior lecturer at the Department of Microbiology at Universiti Putra Malaysia. Her current research focuses on strategies for miniaturized biomarker detection, mainly in the development of nanobiosensors utilizing bioreceptors such as antibodies and enzymes, targeting various disease-correlated biomarkers and pollutants.
Izwaharyanie Ibrahim is a PhD student in the laboratory of Associate Professor Dr Hong Ngee Lim at Universiti Putra Malaysia. Her research interests involve the fabrication of CdS-modified photosensitive semiconductors for the development of photoelectrochemical detection systems for chemical and biological analytes.
Yun Hau Ng received his PhD from Osaka University in 2009. He is a senior lecturer at the School of Chemical Engineering at UNSW. His research focuses on the development of novel photoactive semiconductors (particles and thin films) for sunlight energy conversion.
Ruzniza Mohd Zawawi received her PhD from Durham University, UK in 2011. She is a senior lecturer at the Department of Chemistry at Universiti Putra Malaysia. Her research areas involve the development and application of electrochemical sensors for detecting chiral molecules of importance in medical, pharmaceutical, and environmental monitoring.
Nay Ming Huang received his BSc, MSc, and PhD degrees from Universiti Kebangsaan Malaysia. He has been a Professor on the Faculty of Engineering, Xiamen University Malaysia since April 2017. He served at the University of Malaya as an Assistant Professor in 2009-2017. His research interest is the fabrication of graphene and graphene-based nanocomposites. He applies these graphene nanomaterials in the fields of sensors, solar energy conversion, and energy storage.
Hong Ngee Lim received her BSc and MSc degrees from Universiti Kebangsaan Malaysia. She was awarded a PhD degree in chemistry from Universiti Putra Malaysia. She is an Associate Professor at the Department of Chemistry at University Putra Malaysia. Since 2009, she has been actively involved in graphene-related research, encompassing the synthesis of graphene-based nanomaterials and their applications.
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ISSN:2050-750X
2050-7518
2050-7518
DOI:10.1039/c8tb00924d