Anti-aggregation of gold nanoparticles for metal ion discrimination: A promising strategy to design colorimetric sensor arrays

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.

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Universal preparation of cellulose-based colorimetric sensor for heavy metal ion detection

Carbohydrate Polymers ◽

10.1016/j.carbpol.2020.116037 ◽

2020 ◽

Vol 236 ◽

pp. 116037

Author(s):

Meng Zhang ◽

Lina Zhang ◽

Huafeng Tian ◽

Ang Lu

Keyword(s):

Heavy Metal ◽

Metal Ion ◽

Colorimetric Sensor ◽

Heavy Metal Ion ◽

Ion Detection ◽

Metal Ion Detection

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A paper-based colorimetric sensor array for discrimination of monofloral European honeys based on gold nanoparticles and chemometrics data analysis

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy ◽

10.1016/j.saa.2020.119076 ◽

2021 ◽

Vol 247 ◽

pp. 119076

Author(s):

Mahsa Chaharlangi ◽

Javad Tashkhourian ◽

Mohammad Mahdi Bordbar ◽

Rebecca Brendel ◽

Philipp Weller ◽

...

Keyword(s):

Gold Nanoparticles ◽

Data Analysis ◽

Sensor Array ◽

Colorimetric Sensor ◽

Colorimetric Sensor Array

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Gold Nanoparticles Synthesis and Antimicrobial Effect on Fibrous Materials

Nanomaterials ◽

10.3390/nano11051067 ◽

2021 ◽

Vol 11 (5) ◽

pp. 1067

Author(s):

Behnaz Mehravani ◽

Ana Isabel Ribeiro ◽

Andrea Zille

Keyword(s):

Gold Nanoparticles ◽

Antimicrobial Properties ◽

Antimicrobial Effect ◽

Environmental Concerns ◽

Fibrous Materials ◽

Barrier Material ◽

Future Studies ◽

Textile Materials ◽

Promising Strategy ◽

Antimicrobial Materials

Depositing nanoparticles in textiles have been a promising strategy to achieve multifunctional materials. Particularly, antimicrobial properties are highly valuable due to the emergence of new pathogens and the spread of existing ones. Several methods have been used to functionalize textile materials with gold nanoparticles (AuNPs). Therefore, this review highlighted the most used methods for AuNPs preparation and the current studies on the topic in order to obtain AuNPs with suitable properties for antimicrobial applications and minimize the environmental concerns in their production. Reporting the detailed information on the functionalization of fabrics, yarns, and fibers with AuNPs by different methods to improve the antimicrobial properties was the central objective. The studies combining AuNPs and textile materials have opened valuable opportunities to develop antimicrobial materials for health and hygiene products, as infection control and barrier material, with improved properties. Future studies are needed to amplify the antimicrobial effect of AuNPs onto textiles and minimize the concerns related to the synthesis.

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