Novel enzymatic synthesis of core/shell AgNP/AuNC bimetallic nanostructure and its catalytic applications

Alex, A. Vinotha; Chandrasekaran, N.; Mukherjee, Amitava

doi:10.1016/j.molliq.2020.112463

Cited by 13 publications

(1 citation statement)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Figure 1C, DPA@Ag/Cu NCs were monodispersed and exhibited a highly uniform spherical structure with a size range of 1.0−4.5 nm and an average diameter of 2.5 nm (Figure 1D). Moreover, the lattices could be seen obviously in the nanostructure, and the average lattice distances of 0.128 and 0.262 nm were attributed to the (220) plane of Cu and the (111) plane of Ag, 46,47 respectively, indicating the compacted microscopic arrangement. In the mapping diagram of DPA@Ag/Cu NCs, a uniform distribution of C, S, N, Cu, and Ag elements was observed in the nanoclusters, demonstrating the successful doping of Cu into the nanoclusters (Figure 1E).…”

Section: ■ Results and Discussionmentioning

confidence: 98%

d-Penicillamine@Ag/Cu Nanocluster-Based Fluorescent Nanoneuron for Logic Screening Phosphonate-Type Organophosphate Pesticides and Steganographically Encrypting Information

Fan

Dong

et al. 2023

Anal. Chem.

View full text Add to dashboard Cite

Organophosphate pesticides are used in agriculture due to their high effectiveness and low persistence in eradicating insects and pests. However, conventional detection methods encounter the limitation of undesired detection specificity. Thus, screening phosphonate-type organophosphate pesticides (OOPs) from their analogues, phosphorothioate organophosphate pesticides (SOPs), remains a challenge. Here, we reported a D-penicillamine@Ag/Cu nanocluster (DPA@Ag/Cu NCs)based fluorescence assay to screen OOPs from 21 kinds of organophosphate pesticides, which can be used for logic sensing and information encryption. Acetylthiocholine chloride was enzymatically split by acetylcholinesterase (AChE) to produce thiocholine, which reduced the fluorescence of DPA@Ag/Cu NCs due to the transmission of electrons from DPA@Ag/Cu NCs donor to the thiol group acceptor. Impressively, OOPs acted as an AChE inhibitor and retained the high fluorescence of DPA@Ag/Cu NCs due to the stronger positive electricity of the phosphorus atom. Conversely, SOPs possessed weak toxicity to AChE, which led to low fluorescence intensity. By setting 21 kinds of organophosphate pesticides as the inputs and the fluorescence of the resulting products as the outputs, DPA@Ag/Cu NCs could serve as a fluorescent nanoneuron to construct Boolean logic tree and complex logic circuit for molecular computing. As a proof of concept, by converting the selective response patterns of DPA@Ag/Cu NCs into binary strings, molecular cryptosteganography for encoding, storing, and concealing information was successfully achieved. This study is expected to advance the progress and practical application of nanoclusters in the area of logic detection and information security while also enhancing the relationship between molecular sensors and the world of information.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 98%