A colorimetric Boolean INHIBIT logic gate for the determination of sulfide based on citrate-capped gold nanoparticles

Deng, Hao‐Hua; Wu, Gang-Wei; Lin, Xiaoqing; Xu, Xin; Liu, Ailin; Xia, Xing‐Hua; Chen, Wei

doi:10.1039/c5ra10085b

Cited by 14 publications

(2 citation statements)

References 30 publications

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“…This was due to strong chemisorption of iodide onto the AuNP surfaces, leading to a decrease of ζ-potential of nanoparticles resulting in loss of colloidal stability. This group also constructed an INHIBIT logic gate based on regulation of colloidal stability of AuNPs with sulfide and thiourea . Specifically, neutral thiourea molecules were able to displace citrate anions from AuNP surfaces, thereby decreasing ζ-potential of AuNPs and impelling their aggregation.…”

Section: Logic-gated Nanoagents For Specific Biomedical Applicationsmentioning

confidence: 99%

“…This group also constructed an INHIBIT logic gate based on regulation of colloidal stability of AuNPs with sulfide and thiourea. 137 Specifically, neutral thiourea molecules were able to displace citrate anions from AuNP surfaces, thereby decreasing ζpotential of AuNPs and impelling their aggregation. The negatively charged sulfide could prevent this thiourea-induced aggregation because it had higher affinity to gold and therefore provided sufficient colloidal stabilization.…”

Section: Chemical Reviewsmentioning

confidence: 99%

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Advanced Smart Nanomaterials with Integrated Logic-Gating and Biocomputing: Dawn of Theranostic Nanorobots

2018

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Accurate and precise drug delivery is the key to successful therapy. Monoclonal antibodies, which can transport therapeutic payload to cells expressing specific markers, have paved the way for targeted drug delivery and currently show tremendous clinical success. However, in those abundant cases, when a disease cannot be characterized by a single specific marker, more sophisticated drug delivery systems are required. To enhance targeting accuracy, diverse smart materials have been proposed that can also react to stimuli like variations of pH, temperature, magnetic field, etc. Furthermore, over the past few years a new category of smart materials has emerged, which can not only respond to virtually any biochemical or physical stimulus but also simultaneously analyze several cues and, moreover, can be programmed to use Boolean logic for such analysis. These advanced biocomputing agents have the potential to become a basis for future nanorobotic devices that could overcome some of the grand challenges of modern biomedicine. Here, with a brief introduction to the multidisciplinary field of biomolecular computing, we will review the concepts of nanomaterials with built-in biocomputing capabilities, which can be potentially used for drug delivery and other theranostic applications.

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Section: Logic-gated Nanoagents For Specific Biomedical Applicationsmentioning

confidence: 99%

Section: Chemical Reviewsmentioning

confidence: 99%

Advanced Smart Nanomaterials with Integrated Logic-Gating and Biocomputing: Dawn of Theranostic Nanorobots

2018

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Twinning as a Guiding Factor in Morphological Anisotropy of Silver Nanoparticles Stabilized Over L–DOPA: A Colorimetric Probe for Sulfide in Aqueous Medium

Sanskriti

Upadhyay

2019

ChemistrySelect

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Herein an interesting case study of morphological anisotropy of silver nanoparticles (AgNPs) stabilized over 3,4-dihydroxy-Lphenylalanine (L-DOPA) is presented. The deeper investigation of a variety of shapes of these silver nanoparticles through TEM and HRTEM clearly revealed the definite role of twinning besides the role of multiple structures of L-DOPA prevailing in alkaline medium. These AgNPs were further also exploited as a colorimetric sensor for sulfide (S 2À ). The same underwent bleaching of their deep yellowish brown color upon their interaction with sulfide in the aqueous medium with an appealing LOD of 65 nM. The probe worked well within the broad pH range 5 to 11. The chemosensing studies were well accomplished by UV-visible, TEM, EDX and elemental mapping studies.

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A highly selective colorimetric sulfide assay based on the inhibition of the peroxidase-like activity of copper nanoclusters

Liao

Zhang

et al. 2018

Microchim Acta

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The authors report that sulfide ions are capable of inhibiting the peroxidase-like activity of copper nanoclusters (CuNCs). The catalytic activity of CuNCs toward the oxidation of the chromogenic substrate 3,3',5,5'-tetramethylbenzidine by HO is remarkably decreased in the presence of sulfide. Based on this finding, a colorimetric assay was developed for the rapid determination of sulfide. Best operated at a wavelength of 652 nm, it has a 0.5 μM detection limit. The method is highly selective and has been successfully applied to the quantification of sulfide in environmental water samples. Graphical abstract The catalytic activity of CuNCs toward the oxidation of 3,3',5,5'-tetramethylbenzidine by HO is remarkably decreased in the presence of sulfide ions. This finding has been applied to design a method for colorimetric quantification of sulfide ions in environmental samples.

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A colorimetric Boolean INHIBIT logic gate for the determination of sulfide based on citrate-capped gold nanoparticles

Abstract: An INHIBIT logic gate is designed based on citrate-capped gold nanoparticles and successfully utilized to the determination of sulfide.

Cited by 14 publications

References 30 publications

Advanced Smart Nanomaterials with Integrated Logic-Gating and Biocomputing: Dawn of Theranostic Nanorobots

Advanced Smart Nanomaterials with Integrated Logic-Gating and Biocomputing: Dawn of Theranostic Nanorobots

Twinning as a Guiding Factor in Morphological Anisotropy of Silver Nanoparticles Stabilized Over L–DOPA: A Colorimetric Probe for Sulfide in Aqueous Medium

A highly selective colorimetric sulfide assay based on the inhibition of the peroxidase-like activity of copper nanoclusters

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