Resurfaced Fluorescent Protein as a Sensing Platform for Label-Free Detection of Copper(II) Ion and Acetylcholinesterase Activity

2015 ◽  
Vol 87 (3) ◽  
pp. 1974-1980 ◽  
Author(s):  
Chunyang Lei ◽  
Zhen Wang ◽  
Zhou Nie ◽  
Honghua Deng ◽  
Huiping Hu ◽  
...  
Keyword(s):  
Fluorescent Protein ◽  
Acetylcholinesterase Activity ◽  
Label Free ◽  
Sensing Platform ◽  
Label Free Detection

scholarly journals An Aptamer-Based Capacitive Sensing Platform for Specific Detection of Lung Carcinoma Cells in the Microfluidic Chip

Biosensors ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 98 ◽  
Author(s):  
Ngoc-Viet Nguyen ◽  
Chun-Hao Yang ◽  
Chung-Jung Liu ◽  
Chao-Hung Kuo ◽  
Deng-Chyang Wu ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Lung Carcinoma ◽  
Early Stage ◽  
A549 Cells ◽  
Microfluidic Channel ◽  
Electrical Impedance Spectroscopy ◽  
Label Free ◽  
Early Stage Lung Cancer ◽  
Sensing Platform ◽  
Label Free Detection

Improvement of methods for reliable and early diagnosis of the cellular diseases is necessary. A biological selectivity probe, such as an aptamer, is one of the candidate recognition layers that can be used to detect important biomolecules. Lung cancer is currently a typical cause of cancer-related deaths. In this work, an electrical sensing platform is built based on amine-terminated aptamer modified-gold electrodes for the specific, label-free detection of a human lung carcinoma cell line (A549). The microdevice, that includes a coplanar electrodes configuration and a simple microfluidic channel on a glass substrate, is fabricated using standard photolithography and cast molding techniques. A procedure of self-assembly onto the gold surface is proposed. Optical microscope observations and electrical impedance spectroscopy measurements confirm that the fabricated microchip can specifically and effectively identify A549 cells. In the experiments, the capacitance element that is dominant in the change of the impedance is calculated at the appropriate frequency for evaluation of the sensitivity of the biosensor. Therefore, a simple, inexpensive, biocompatible, and selective biosensor that has the potential to detect early-stage lung cancer would be developed.

Cobalt oxyhydroxide nanoflake based fluorescence sensing platform for label-free detection of DNA

The Analyst ◽  
2016 ◽  
Vol 141 (15) ◽  
pp. 4719-4724 ◽  
Author(s):  
Yaqing Chang ◽  
Zhe Zhang ◽  
Huiqing Liu ◽  
Nan Wang ◽  
Jilin Tang
Keyword(s):  
Fluorescence Quenching ◽  
Label Free ◽  
Quenching Mechanism ◽  
Fluorescence Sensing ◽  
Single Stranded Dna ◽  
Cobalt Oxyhydroxide ◽  
Sensing Platform ◽  
Label Free Detection ◽  
Fluorescence Quenching Mechanism ◽  
Coooh Nanoflakes

In this study, we investigated the interaction of cobalt oxyhydroxide (CoOOH) nanoflakes with DNA and their fluorescence quenching mechanism of a FAM-labeled single-stranded DNA (ssDNA) probe.

scholarly journals Nanostructured Aptamer-Functionalized Black Phosphorus Sensing Platform for Label-Free Detection of Myoglobin, a Cardiovascular Disease Biomarker

2016 ◽  
Vol 8 (35) ◽  
pp. 22860-22868 ◽  
Author(s):  
Vinod Kumar ◽  
Jack R. Brent ◽  
Munish Shorie ◽  
Harmanjit Kaur ◽  
Gaganpreet Chadha ◽  
...  
Keyword(s):  
Cardiovascular Disease ◽  
Black Phosphorus ◽  
Label Free ◽  
Disease Biomarker ◽  
Sensing Platform ◽  
Label Free Detection

A nanofluidic device for ultrasensitive and label-free detection of tetracycline in association with γ-cyclodextrin and GO

2021 ◽  
Vol 13 (15) ◽  
pp. 1832-1838
Author(s):  
Jiaxi Cheng ◽  
Fenghua Jiang ◽  
Siqi Zhang
Keyword(s):  
Detection Limit ◽  
Water Samples ◽  
Recovery Rate ◽  
Label Free ◽  
Detection Range ◽  
Low Detection Limit ◽  
Sensing Platform ◽  
Label Free Detection ◽  
Nanofluidic Device

We develop a label-free, sensitive and selective nanochannel sensing platform for detection of TC. The nanosensor provided a low detection limit, a wide detection range and excellent recovery rate in different water samples.

Construction of unconventional fluorescent poly(amino ester) polyols as sensing platform for label-free detection of Fe3+ ions and l-cysteine

2018 ◽  
Vol 53 (22) ◽  
pp. 15717-15725 ◽  
Author(s):  
Heng Chen ◽  
Wei Dai ◽  
Junxian Huang ◽  
Shaojun Chen ◽  
Xiaohui Yan
Keyword(s):  
Amino Ester ◽  
Label Free ◽  
Sensing Platform ◽  
Label Free Detection

Experimental Study on Utilizing Delayed-Feedback for Ultra-Sensitive Sensing

2007 ◽  
Author(s):  
Calvin Bradley ◽  
Mohammed F. Daqaq ◽  
Nader Jalili
Keyword(s):  
Limit Cycles ◽  
Stable Limit Cycle ◽  
Current Sensor ◽  
Stable Limit ◽  
Label Free ◽  
Mass Sensing ◽  
Mass Sensors ◽  
Sensing Platform ◽  
Label Free Detection ◽  
Sensor Geometry

Cantilever-based mass sensors have recently emerged as an effective device for label-free detection of ultra small masses. To improve their sensitivity, a new concept based on delayed-position feedback is proposed and implemented. The proposed approach utilizes feedback delays and inherent system nonlinearities to produce stable limit-cycle oscillations. These limit cycles are generated as a result of the trivial solutions loosing stability via a supercritical Hopf bifurcation. The amplitude of the limit cycles is shown to be ultra sensitive to variations in the sensor natural frequency. This creates an ultra-sensitive cantilever-based mass sensing platform which does not require any changes or additions to the current sensor geometry and can be implemented in real time.

Bright Yellow Fluorescent Carbon Dots as a Multifunctional Sensing Platform for the Label-Free Detection of Fluoroquinolones and Histidine

2018 ◽  
Vol 10 (49) ◽  
pp. 42915-42924 ◽  
Author(s):  
Wenjing Lu ◽  
Yuan Jiao ◽  
Yifang Gao ◽  
Jie Qiao ◽  
Maedeh Mozneb ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Label Free ◽  
Bright Yellow ◽  
Sensing Platform ◽  
Label Free Detection ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

Phosphorylation-Mediated Assembly of a Semisynthetic Fluorescent Protein for Label-Free Detection of Protein Kinase Activity

2015 ◽  
Vol 87 (12) ◽  
pp. 6311-6318 ◽  
Author(s):  
Chao Yin ◽  
Ming Wang ◽  
Chunyang Lei ◽  
Zhen Wang ◽  
Pei Li ◽  
...  
Keyword(s):  
Protein Kinase ◽  
Kinase Activity ◽  
Fluorescent Protein ◽  
Protein Kinase Activity ◽  
Label Free ◽  
Label Free Detection
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