Journal ArticleDOI
Mercury (II) Ion Detection using AgNWs-MoS2 Nanocomposite on GaN HEMT for IoT Enabled Smart Water Quality Analysis
TLDR
In this article, the authors have demonstrated a highly sensitive platform for real-time detection of Mercury (Hg2+) ions after successfully making silver nanowires (AgNWs)-MoS2 nanocomposite and functionalizing it over ungated AlGaN/GaN high electron mobility transistor (HEMT).Abstract:
We have demonstrated a highly sensitive novel platform for real-time detection of Mercury (Hg2+) ions after successfully making silver nanowires (AgNWs)-MoS2 nanocomposite and functionalizing it over ungated AlGaN/GaN high electron mobility transistor (HEMT) The AlGaN/GaN HEMT structures were grown over the sapphire substrate using Molecular Beam Epitaxy AgNWs-MoS2 nanocomposites were optimized for the device functionalization and 1:4 ratio was found highly sensitive for Hg2+ ions The sensor exhibits high sensitivity towards Hg2+ ions of 1604 mA/ppb and calculated its Limit of Detection (LoD) up to the range of 20 ppt The observed sensitivity is highest among previously reported AlGaN/GaN fabricated HEMT based sensors for Mercury (Hg2+) ions detection and is well below the standard permissible limits as set by World Health Organization (WHO) and Environmental Protection Agency (EPA) The enhancement in sensitivity is due to the enhanced surface to volume ratio of AgNW-MoS2 nanocomposite and the highly conductive nature of silver nanowires incorporated in MoS2 Moreover, we also performed sensing on real water samples of tap water and lake water Further, we showed the smart sensing capability of our developed sensor by illustrating the Internet of Things (IoT) enabled system for next-generation heavy metal ion sensingread more
Citations
More filters
Journal ArticleDOI
Development of semiconductor based heavy metal ion sensors for water analysis: A review
TL;DR: In this article, the authors introduce the recent trends in heavy metal ion sensing with semiconductor devices, including ion-sensitive field effect transistors (ISFETs) and AlGaN/GaN high electron mobility transistors(HEMTs) and semiconductor materials like graphene, two-dimensional metal dichalcogenides, decorated with different nanoparticles with appropriate functionalization.
Journal ArticleDOI
A Disposable Electrochemical Biosensor Based on Screen-Printed Carbon Electrodes Modified with Silver Nanowires/HPMC/Chitosan/Urease for the Detection of Mercury (II) in Water.
Apichart Saenchoopa,Supannika Klangphukhiew,Rachata Somsub,Chanon Talodthaisong,Rina Patramanon,Jureerut Daduang,Sakda Daduang,Sirinan Kulchat +7 more
TL;DR: In this article, the surface modification of a screen-printed carbon electrode (SPCE) was used for the detection of Hg(II) in water by modifying the surface of the carbon electrode.
Journal ArticleDOI
Nano-functionalized paper-based IoT enabled devices for point-of-care testing: a review
TL;DR: In this article, the authors summarized the state-of-the-art research work carried out over nano functionalized paper-based analytical devices and associated challenges/solutions in the point of care testing domain.
Journal ArticleDOI
Microfluidic Devices for the Detection of Contamination in Water Samples: A Review
TL;DR: In this article , a review article discusses latest development on the microfluidic-based water quality control devices, explored detection schemes, relevant fundamentals along with the state-of-the-art research work performed on micro-fluid-based devices for water contamination including heavy metals, organic, and inorganic contaminants.
Journal ArticleDOI
Ultrasensitive Real-Time Detection of Pb<sup>2+</sup> Ions Using g-C<sub>3</sub>N<sub>4</sub> Nanosheets
TL;DR: In this paper , a GaN-based high-electron-mobility transistor (HEMT) sensor has been fabricated using optical lithography and explored as a prospective sensor for the determination of trace Pb2+ ions present in the water.