Graphene oxide amplified fluorescence anisotropy for label-free detection of potassium ion

The Analyst ◽  
2015 ◽  
Vol 140 (1) ◽  
pp. 353-357 ◽  
Author(s):  
Shu Jun Zhen ◽  
Yan Yu ◽  
Chun Mei Li ◽  
Cheng Zhi Huang
Keyword(s):  
Graphene Oxide ◽  
Fluorescence Anisotropy ◽  
Potassium Ion ◽  
Sensitive Detection ◽  
Label Free ◽  
Label Free Detection

A label-free fluorescence anisotropy method for the sensitive detection of potassium ion, by using graphene oxide as enhancer, was established.

Label free Detection of Vitamin B12 Based on Fluorescence Quenching of Graphene Oxide Nanolayer

2015 ◽  
Vol 23 (10) ◽  
pp. 878-884 ◽  
Author(s):  
Javad Gholami ◽  
Mehrdad Manteghian ◽  
Alireza Badiei ◽  
Mehran Javanbakht ◽  
Hiroshi Ueda
Keyword(s):  
Graphene Oxide ◽  
Fluorescence Quenching ◽  
Vitamin B12 ◽  
Label Free ◽  
Label Free Detection

scholarly journals Graphene Oxide Based Electrochemical Genosensor for Label Free Detection of Mycobacterium tuberculosis from Raw Clinical Samples

2021 ◽  
Vol Volume 16 ◽  
pp. 7339-7352
Author(s):  
Aisha Javed ◽  
Shah Rukh Abbas ◽  
Muhammad Uzair Hashmi ◽  
Noor Ul Ain Babar ◽  
Irshad Hussain
Keyword(s):  
Mycobacterium Tuberculosis ◽  
Graphene Oxide ◽  
Clinical Samples ◽  
Label Free ◽  
Label Free Detection ◽  
Electrochemical Genosensor

Gold nanoparticle integrated artificial nanochannels for label-free detection of peroxynitrite

2021 ◽  
Author(s):  
Jing Wu ◽  
Xing Wang ◽  
Lei Ge ◽  
Rui Lv ◽  
Fan Zhang ◽  
...  
Keyword(s):  
Small Molecules ◽  
Gold Nanoparticle ◽  
Sensitive Detection ◽  
Label Free ◽  
Highly Sensitive ◽  
Label Free Detection ◽  
Highly Sensitive Detection

A label-free method for rapid and highly sensitive detection of ONOO− was proposed by employing ABEI@AuNPs integrated nanochannels. This work paves a new way to develop a versatile platform for the detection of different biological small molecules.

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.

scholarly journals New Ultrasensitive Sandwich-Type Immunoassay of Dendritic Tri-Fan Blade-like PdAuCu Nanoparticles/Amine-Functionalized Graphene Oxide for Label-Free Detection of Carcinoembryonic Antigen

Micromachines ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1256
Author(s):  
Pingping Xu ◽  
Wenpo Feng ◽  
Mei Wang ◽  
Ling Zhang ◽  
Gaofeng Liang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Carcinoembryonic Antigen ◽  
Au Nanoparticle ◽  
Functionalized Graphene ◽  
Label Free ◽  
Functionalized Graphene Oxide ◽  
Amine Functionalized ◽  
Label Free Detection ◽  
Sandwich Type ◽  
Fan Blade

The early detection of tumor markers has an effective role in the treatment of cancer. Here, a new sandwich-type electrochemical immunosensor for early label-free detection of the cancer biomarker carcinoembryonic antigen (CEA) was developed. Dendritic tri-fan blade-like PdAuCu nanoparticles (PdAuCu NPs)/amine functionalized graphene oxide (NH2-GO) were the label of secondary antibodies (Ab2), and Au nanoparticle-decorated polydopamines (Au/PDA) were immobilized on a screen-printed carbon electrode (SPCE) as the substrate materials. Dendritic tri-fan blade-like PdAuCu NPs/NH2-GO was synthesized according to a simple hydrothermal procedure and used to immobilize antibodies (Ab2) with large surfaces areas, increased catalytic properties and good adsorption to amplify the current signals. Subsequently, Ab2/PdAuCu NPs/NH2-GO catalyzed the reduction of H2O2 in the sandwich-type immunoreactions. Under optimal conditions, the immunosensor exhibited a satisfactory response to CEA with a limit detection of 0.07 pg mL−1 and a linear detection range from 0.1 pg mL−1 to 200 ng mL−1. The proposed immunosensor could be suitable enough for a real sample analysis of CEA, and has clinical value in the early diagnosis of cancer.

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