Hydrogen peroxide sensitive hemoglobin-capped gold nanoclusters as a fluorescence enhancing sensor for the label-free detection of glucose

RSC Advances ◽  
2015 ◽  
Vol 5 (42) ◽  
pp. 33123-33135 ◽  
Author(s):  
Fatemeh Molaabasi ◽  
Saman Hosseinkhani ◽  
Ali Akbar Moosavi-Movahedi ◽  
Mojtaba Shamsipur
Keyword(s):  
Hydrogen Peroxide ◽  
Fluorescent Probe ◽  
Direct Detection ◽  
Gold Nanoclusters ◽  
Label Free ◽  
Label Free Detection ◽  
Fluorescence Enhancing

A novel label-free fluorescent probe based on blue-emitting gold nanoclusters capped by hemoglobin for the direct detection of glucose is presented.

Label-free detection of folic acid using a sensitive fluorescent probe based on ovalbumin stabilized copper nanoclusters

Talanta ◽  
2019 ◽  
Vol 195 ◽  
pp. 372-380 ◽  
Author(s):  
Xinge Li ◽  
Xiaoman Wu ◽  
Fei Zhang ◽  
Bing Zhao ◽  
Yan Li
Keyword(s):  
Folic Acid ◽  
Fluorescent Probe ◽  
Label Free ◽  
Copper Nanoclusters ◽  
Label Free Detection

scholarly journals Terahertz Detection of Zika Viruses

2020 ◽  
Author(s):  
Subhashish Dolai ◽  
Massood Tabib-Azar
Keyword(s):  
Electromagnetic Waves ◽  
Direct Detection ◽  
Petri Dish ◽  
Label Free ◽  
Low Loss ◽  
Terahertz Detection ◽  
Label Free Detection ◽  
Terahertz Transmission ◽  
First Time ◽  
Thick Glass

Our main objective in this work was to examine the possibility of non-intrusive, label-free, detection of whole Zika viruses using terahertz signals with or without a targeting/binding oligonucleotide (aptamers). We report for the first time the use of terahertz electromagnetic waves (0.75 THz – 1.1 THz) to detect Zika viruses. The Zika/aptamer complexes showed a reproducible terahertz reflection coefficient minimum at 1.064 THz while the Zika virus’s reflection minimum was at 1.073 THz. Of different substrates we examined, the polyester petri dish provided a very low loss and excellent terahertz transmission. To increase the interaction between the terahertz signal and the sample we also used polyester microbeads coated with aptamers. We then measured the terahertz reflection from the microbeads as a function of Zika concentration. The resulting terahertz Zika sensor had sensitivity of 63 Hz/Zika and minimum detectable signal of ~ 16x103 Zika. Other substrates such as Graphene on polyethylene terephthalate (PET), 50 nm-thick gold film on polycarbonate, thin (30 um-thick) glass slide and Teflon were also examined. Graphene substrate enabled direct detection of the Zika without any aptamers.

Double stranded DNA-templated copper nanoclusters as a novel fluorescent probe for label-free detection of rutin

2019 ◽  
Vol 11 (28) ◽  
pp. 3584-3589 ◽  
Author(s):  
Yanqiong Lai ◽  
Xia Teng ◽  
Yanli Zhang ◽  
Hongbin Wang ◽  
Pengfei Pang ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Low Cost ◽  
Label Free ◽  
Copper Nanoclusters ◽  
Double Stranded Dna ◽  
Label Free Detection

In this study, we developed a simple, sensitive, low-cost and label-free method to detect rutin by using double-stranded DNA-templated copper nanoclusters (dsDNA-CuNCs) as a fluorescent probe.

Fluorescein-based ionic liquid sensor for label-free detection of serum albumins

RSC Advances ◽  
2014 ◽  
Vol 4 (34) ◽  
pp. 17533-17540 ◽  
Author(s):  
Waduge Indika S. Galpothdeniya ◽  
Susmita Das ◽  
Sergio L. De Rooy ◽  
Bishnu P. Regmi ◽  
Suzana Hamdan ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Fluorescent Probe ◽  
Room Temperature ◽  
Room Temperature Ionic Liquid ◽  
Sensitive Detection ◽  
Label Free ◽  
Serum Albumins ◽  
Label Free Detection

Fluorescein-based room temperature ionic liquid as a fluorescent probe for highly selective and sensitive detection of serum albumins.

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