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.

Colorimetric Detection of Heavy Metal Ions Using Label-Free Gold Nanoparticles and Alkanethiols

2010 ◽  
Vol 114 (39) ◽  
pp. 16329-16334 ◽  
Author(s):  
Yu-Lun Hung ◽  
Tung-Ming Hsiung ◽  
Yi-You Chen ◽  
Yu-Fen Huang ◽  
Chih-Ching Huang
Keyword(s):  
Heavy Metal ◽  
Gold Nanoparticles ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Colorimetric Detection ◽  
Label Free ◽  
Free Gold

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.

scholarly journals Synthesis of Gold Nanoparticles to Capture Lifelike Proteins: Application on the Multichannel Sensor Array Design

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Yumin Leng ◽  
Chunhua Ma ◽  
Wentai Zhang ◽  
Kecheng Liu ◽  
Zhiwen Lu
Keyword(s):  
Heavy Metal ◽  
Gold Nanoparticles ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Chemical Elements ◽  
Protein Structures ◽  
Sensor Arrays ◽  
Label Free ◽  
Optical Responses

The chemical elements of proteins are similar to that of DNA (e.g., C, H, O, and N), and DNA shows different knotted architectures. So we imagine that proteins may show a wealth of highly complex structures, especially when proteins interact with each other. The imagination was proved by synthesizing gold nanoparticles (GNPs) to capture the lifelike protein structures. The optical responses (i.e., color) of as-prepared GNPs are found to be characteristic to a given protein (or heavy metal ion). Based on the “three colors” principle of Thomas Young, we extracted the red, green, and blue (RGB) alterations of as-synthesized GNPs to fabricate multichannel sensor arrays for proteins (or heavy metal ions) discrimination. The designed multichannel sensor arrays demonstrate possibilities in semiquantitative analysis of multiple analytes (e.g., proteins and heavy metal ions). This work is believed to open new opportunities for GNPs-based label-free sensing.

Robust transparent mesoporous silica membranes as matrices for colorimetric sensors

RSC Advances ◽  
2015 ◽  
Vol 5 (21) ◽  
pp. 16549-16553 ◽  
Author(s):  
Donghun Kim ◽  
Bradley F. Chmelka
Keyword(s):  
Heavy Metal ◽  
Mesoporous Silica ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Colorimetric Detection ◽  
High Surface ◽  
Silica Membranes ◽  
Surface Areas ◽  
Functionalized Mesoporous Silica ◽  
Colorimetric Sensors

Transparent functionalized mesoporous silica membranes have been prepared with high surface areas (∼500 m2 g−1) that exhibit high sensitivities for colorimetric detection and sensing of dilute heavy-metal ions (e.g., Pb2+).

Colorimetric detection of heavy metal ions in water via metal-organic framework

2019 ◽  
Vol 486 ◽  
pp. 69-73 ◽  
Author(s):  
Jiwon Kim ◽  
Jung Suk Oh ◽  
Kyoung Chul Park ◽  
Gajendra Gupta ◽  
Chang Yeon Lee
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Metal Organic Framework ◽  
Colorimetric Detection ◽  
Metal Organic ◽  
Organic Framework

Aminopyrazole-Based Ligand Induces Gold Nanoparticle Formation and Remains Available for Heavy Metal Ions Sensing. A Simple “Mix and Detect” Approach

Langmuir ◽  
2010 ◽  
Vol 26 (12) ◽  
pp. 10165-10170 ◽  
Author(s):  
Gemma Aragay ◽  
Josefina Pons ◽  
Josep Ros ◽  
Arben Merkoçi
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Gold Nanoparticle ◽  
Heavy Metal Ions ◽  
Nanoparticle Formation

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.

[Fe(CN)6]4− decorated mesoporous gelatin thin films for colorimetric detection and as sorbents of heavy metal ions

2013 ◽  
Vol 42 (36) ◽  
pp. 13265 ◽  
Author(s):  
Li Shi ◽  
Hubiao Huang ◽  
Luwei Sun ◽  
Yanping Lu ◽  
Binyang Du ◽  
...  
Keyword(s):  
Thin Films ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Colorimetric Detection
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