scholarly journals Disulfide-induced self-assembled targets: A novel strategy for the label free colorimetric detection of DNAs/RNAs via unmodified gold nanoparticles

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Ehsan Shokri ◽  
Morteza Hosseini ◽  
Mehdi D. Davari ◽  
Mohammad R. Ganjali ◽  
Maikel P. Peppelenbosch ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Detection ◽  
Label Free ◽  
Self Assembled ◽  
Novel Strategy

Label-Free Pb(II) Whispering Gallery Mode Sensing Using Self-Assembled Glutathione-Modified Gold Nanoparticles on an Optical Microcavity

2014 ◽  
Vol 86 (13) ◽  
pp. 6299-6306 ◽  
Author(s):  
Sirirat Panich ◽  
Kerry A. Wilson ◽  
Philippa Nuttall ◽  
Christopher K. Wood ◽  
Tim Albrecht ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Whispering Gallery Mode ◽  
Label Free ◽  
Optical Microcavity ◽  
Whispering Gallery ◽  
Self Assembled

Colorimetric Detection of DNA Sequences Using an Organic Solvent to Induce the Aggregation of Label-Free Gold Nanoparticles

2013 ◽  
Vol 13 (6) ◽  
pp. 3805-3809 ◽  
Author(s):  
Huning Jia ◽  
Xiaomei Cao ◽  
Cong Fu ◽  
Jianping Wang ◽  
Zhiyao Chen ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Organic Solvent ◽  
Dna Sequences ◽  
Colorimetric Detection ◽  
Label Free ◽  
Free Gold

Sensitive colorimetric detection of cyromazine in cucumber samples by using label-free gold nanoparticles and polythymine

The Analyst ◽  
2015 ◽  
Vol 140 (9) ◽  
pp. 3064-3069 ◽  
Author(s):  
Jinchuan Liu ◽  
Wenhui Bai ◽  
Chao Zhu ◽  
Mengmeng Yan ◽  
Shuming Yang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Detection ◽  
Colorimetric Method ◽  
Label Free ◽  
Free Gold

A sensitive colorimetric method for cyromazine detection in cucumber samples was developed by using label-free gold nanoparticles and polythymine.

Electrochemical Aptasensor for Label-Free Detection of Protein Based on Gold Nanoparticle Involved Self-Assembly

2013 ◽  
Vol 310 ◽  
pp. 177-182
Author(s):  
Song Bai Zhang ◽  
Bing Jun Zhang ◽  
Qian Liu ◽  
Xia Hu ◽  
Li Ying Zheng ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Self Assembly ◽  
Gold Electrode ◽  
Hot Water ◽  
Target Protein ◽  
Capture Probe ◽  
Label Free ◽  
Label Free Detection ◽  
Self Assembled

A label-free electrochemical biosensing strategy based on gold nanoparticle involved layer-by-layer self assembly for the detection of protein is proposed using platelet derived growth factor-BB dimer (PDGF-BB) as the model analyte. Utilizing the strong sulfur-Au affinity, ethanthiol and capture probe modified gold nanoparticles are self-assembled onto the surface of gold electrode successively. The aptamer probe for target protein hybridizes with the capture probe and the biosensor is fabricated. By measuring ac current voltammetry, the target protein can be sensitively detected in a linear dynamic range from 1-1000 ng/mL with a low detection limit of 0.5 ng/mL. Making use of self-assembled gold nanoparticles layer, a large amount of capture probes can be modified onto the gold electrode, supporting the high sensitivity of the proposed strategy. In addition, good reproducibility, high selectivity and stability are achieved. In particular, the biosensor can be easily regenerated by melting in hot water, making it reusable.

A gold nanoparticle-based label free colorimetric aptasensor for adenosine deaminase detection and inhibition assay

The Analyst ◽  
2015 ◽  
Vol 140 (5) ◽  
pp. 1572-1577 ◽  
Author(s):  
Fen Cheng ◽  
Yue He ◽  
Xiao-Jing Xing ◽  
Dai-Di Tan ◽  
Yi Lin ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Adenosine Deaminase ◽  
Gold Nanoparticle ◽  
Label Free ◽  
Inhibition Assay ◽  
Free Gold ◽  
Novel Strategy ◽  
Colorimetric Aptasensor

A novel strategy for the fabrication of a colorimetric aptasensor using label free gold nanoparticles (AuNPs) is proposed. The aptasensor consists of adenosine (AD) aptamer, AD and AuNPs. The strategy has been employed for the assay of adenosine deaminase (ADA) activity.

Analyte-triggered autocatalytic amplification combined with gold nanoparticle probes for colorimetric detection of heavy-metal ions

2017 ◽  
Vol 53 (54) ◽  
pp. 7477-7480 ◽  
Author(s):  
Juanhua Yang ◽  
Yun Zhang ◽  
Lang Zhang ◽  
Huili Wang ◽  
Jinfang Nie ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Gold Nanoparticles ◽  
Metal Ions ◽  
Gold Nanoparticle ◽  
Heavy Metal Ions ◽  
Colorimetric Detection ◽  
Detection Limits ◽  
Label Free ◽  
Nanoparticle Probes ◽  
Free Gold

This work reports a new nanosensor based on analyte-triggered autocatalytic amplification and label-free gold nanoparticles for the colorimetric detection of Hg2+, Cu2+and Ag+with detection limits less than 3 nM.

Dissecting the Effect of Salt for More Sensitive Label-Free Colorimetric Detection of DNA Using Gold Nanoparticles

2020 ◽  
Vol 92 (19) ◽  
pp. 13354-13360
Author(s):  
Shengqiang Hu ◽  
Po-Jung Jimmy Huang ◽  
Jianxiu Wang ◽  
Juewen Liu
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Detection ◽  
Label Free

scholarly journals Development of label-free gold nanoparticle based rapid colorimetric assay for clinical/point-of-care screening of cervical cancer

2020 ◽  
Vol 2 (12) ◽  
pp. 5737-5745
Author(s):  
Tejaswini Appidi ◽  
Sushma V. Mudigunda ◽  
Suseela Kodandapani ◽  
Aravind Kumar Rengan
Keyword(s):  
Cervical Cancer ◽  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Colorimetric Assay ◽  
Point Of Care ◽  
Colorimetric Detection ◽  
Label Free ◽  
Free Gold ◽  
Clinical Point

“C-ColAur” technique for colorimetric detection of cervical cancer by in situ formation of gold nanoparticles.

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