Facile synthesis of boron- and nitride-doped MoS2 nanosheets as fluorescent probes for the ultrafast, sensitive, and label-free detection of Hg2+

The Analyst ◽  
2015 ◽  
Vol 140 (13) ◽  
pp. 4654-4661 ◽  
Author(s):  
Xiaojia Liu ◽  
Liping Li ◽  
Yuanjie Wei ◽  
Yizhi Zheng ◽  
Qian Xiao ◽  
...  
Keyword(s):  
Transition Metal ◽  
Band Gap ◽  
Fluorescent Probes ◽  
Label Free ◽  
Mos2 Nanosheets ◽  
Facile Synthesis ◽  
Metal Chalcogenide ◽  
Chalcogenide Material ◽  
Label Free Detection ◽  
Indirect Band Gap

Bulk MoS2, a prototypical transition metal chalcogenide material, is an indirect band gap semiconductor with negligible photoluminescence.

scholarly journals Silicene Quantum Capacitance Dependent Frequency Readout to a Label-free Detection of DNA Hybridization

2021 ◽  
Author(s):  
Sazzadur Rahman ◽  
Rokaia Laizu Naima ◽  
Khatuna Jannatun Shetu ◽  
Mahabub Hossain ◽  
M. Shamim Kaiser ◽  
...  
Keyword(s):  
Band Gap ◽  
Dna Hybridization ◽  
Glucose Sensor ◽  
Detection Method ◽  
Genetic Research ◽  
Ph Sensor ◽  
Detection Methods ◽  
Quantum Capacitance ◽  
Label Free ◽  
Label Free Detection

Two-dimensional silicon allotrodes– also called Sinicene– have recently experienced intensive scientific research interest due to their unique electrical, mechanical, and sensing characteristics. A novel silicene based nano-material has been enticed great amenities, partially because of its uniformity with graphene. Silicene is a highly sensitive for numerous sensors based on molecular sensing as pH sensor, gas sensor, ion sensor and biosensing are Deoxyribonucleic acid (DNA) nucleobase sensor, photonic sensor, cell-based biosensor, glucose sensor, and bioelectric nose sensor. Nowadays genetic research based on DNA hybridization, which is a vital tools for sensing material and it has various detection methods. Among of them, the detection method is frequency readout used to a label-free detection of DNA hybridization. In this paper we have compared the graphene and silicene quantum capacitance that has been proposed for a DNA hybridization detection method on wireless readout. These method shows, the strands of mismatched and complementary DNA have in different range of frequency to identify output efficiency. With respect to DNA concentration the output of silicene is almost sharply linear than graphene. In addition of field effect transistor, silicene opens a new opportunities due to its band gap whereas graphene indicates zero band gap. It can be stated that silicene is much more reliable as well as much stronger than multi-layered graphene.

Poly(thymine)-templated fluorescent copper nanoparticles for label-free detection of N-acetylcysteine in pharmaceutical samples

2015 ◽  
Vol 7 (15) ◽  
pp. 6372-6377 ◽  
Author(s):  
Hai-Bo Wang ◽  
Hong-Ding Zhang ◽  
Ying Chen ◽  
Li-Juan Ou ◽  
Yan-Ming Liu
Keyword(s):  
Copper Nanoparticles ◽  
Fluorescent Probes ◽  
Label Free ◽  
Fluorescence Sensing ◽  
Pharmaceutical Samples ◽  
Label Free Detection

A simple, label-free, sensitive fluorescence sensing strategy is reported for N-acetylcysteine detection by using poly T-templated Cu NPs as fluorescent probes.

Size-dependent optical extinction of MoS2 nanosheets and their aptamer-induced dispersion behavior for the label-free detection of Escherichia coli O157:H7

The Analyst ◽  
2021 ◽  
Author(s):  
Jiye Li ◽  
Jie Wang
Keyword(s):  
Escherichia Coli ◽  
Escherichia Coli O157 ◽  
Label Free ◽  
Mos2 Nanosheets ◽  
Optical Extinction ◽  
Size Dependent ◽  
Dispersion Behavior ◽  
Label Free Detection ◽  
First Time

For the first time, we have revealed the size-dependent extinction response of MoS2-NS aggregation, the phenomenon of which has been employed as a sensing strategy for the label-free detection of Escherichia coli O157:H7.

scholarly journals Role of Defects on Electronic Properties in Various Mono Layer Transition Metal Dichalcogenides

2021 ◽  
Author(s):  
Ravinder Pawar
Keyword(s):  
Transition Metal ◽  
Band Gap ◽  
Density Functional ◽  
Transition Metal Dichalcogenides ◽  
Impurity Band ◽  
Vital Role ◽  
Layer Transition ◽  
Vacancy Defects ◽  
Metal Dichalcogenides ◽  
Indirect Band Gap

The chalcogen vacancy defects in various transition metal dichalcogenides (TMDCs) have been studied using density functional theory (DFT) calculation. Results reveal that (i) the dissociation energy value depends on both nature of chalcogen and transition metal, (ii) the work function depends marginally on the single or double vacancies, (iii) the defect transforms direct band gap to indirect band gap materials (i.e. the pristine materials show KVKC transition whereas defective materials show ΓVKC) and (iii) the d-orbital of the transition metal plays a vital role in the formation of impurity band.

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