Abstract:Gold nanostructures have been significantly employed as attractive sensing probes for environmental and biological analysis. Nevertheless, due to the environment-sensitive local surface plasmon resonance of gold nanostructures and their actively...
“…The differential optical performances of Au/MoS 2 reaction products caused by cysteine enantiomers indicated the chirality transfer of natural small molecules to synthesized materials. After that, these unprecedented chiral materials held high promise in emerging characteristics and significant values in wide applications, such as optical devices, sensing, and immunity. − To obtain a better understanding of the formation and chiral growth routes of these chiral materials, the reaction conditions were optimized and intermediate products were captured for further investigation.…”
The way of accurately regulating the growth of chiral plasmonics is of great importance for exploring the chirality information and improving its potential values. Herein, cysteine enantiomers modulate the anisotropic and epitaxial growth of gold nanoplasmonics on seeds of exfoliated MoS 2 nanosheets. The heterostructural Au and MoS 2 hybrids induced by enantiomeric cysteine are presented with chiroptical characteristics, dendritic morphologies, and plasmonic performances. Moreover, the synthesis, condition optimization, formation mechanism, and plasmonic properties of Au and MoS 2 dendritic nanostructures are studied. The chirality characteristics are identified using the circular dichroism spectra and scanning electron microscopy. Time-resolved transmission electron microscopy and UV−vis spectra of the intermediate products captured are analyzed to confirm the formation mechanism of dendritic plasmonic nanostructures at heterostructural surfaces. The specific dendritic morphologies originate from the synergistic impacts of heterostructural MoS 2 interfaces and enantiomeric cysteine-induced anisotropic manipulation. Significantly, the developed synthesis strategy of chiral nanostructures at heterostructural interfaces is highly promising in promoting the understanding of the plasmonic function and crucial chirality bioinformation.
“…The differential optical performances of Au/MoS 2 reaction products caused by cysteine enantiomers indicated the chirality transfer of natural small molecules to synthesized materials. After that, these unprecedented chiral materials held high promise in emerging characteristics and significant values in wide applications, such as optical devices, sensing, and immunity. − To obtain a better understanding of the formation and chiral growth routes of these chiral materials, the reaction conditions were optimized and intermediate products were captured for further investigation.…”
The way of accurately regulating the growth of chiral plasmonics is of great importance for exploring the chirality information and improving its potential values. Herein, cysteine enantiomers modulate the anisotropic and epitaxial growth of gold nanoplasmonics on seeds of exfoliated MoS 2 nanosheets. The heterostructural Au and MoS 2 hybrids induced by enantiomeric cysteine are presented with chiroptical characteristics, dendritic morphologies, and plasmonic performances. Moreover, the synthesis, condition optimization, formation mechanism, and plasmonic properties of Au and MoS 2 dendritic nanostructures are studied. The chirality characteristics are identified using the circular dichroism spectra and scanning electron microscopy. Time-resolved transmission electron microscopy and UV−vis spectra of the intermediate products captured are analyzed to confirm the formation mechanism of dendritic plasmonic nanostructures at heterostructural surfaces. The specific dendritic morphologies originate from the synergistic impacts of heterostructural MoS 2 interfaces and enantiomeric cysteine-induced anisotropic manipulation. Significantly, the developed synthesis strategy of chiral nanostructures at heterostructural interfaces is highly promising in promoting the understanding of the plasmonic function and crucial chirality bioinformation.
“…This phenomenon was consistent with the experimental conclusion of the gold nanoparticles being encapsulated into the cysteine-doped agarose hydrogels. 35 In order to further explain the influence of OH − during the synthesis process of H-Au NCs in the gel, phenolphthalein reagent was added to track the OH − in the reaction hydrogels. The position of the white strip interfaces was consistent (Fig.…”
Section: Resultsmentioning
confidence: 99%
“…This in situ staining method was used in colorimetric analysis in our previous works. 34,35 Nevertheless, to the best of our knowledge, no fluorescence staining works have been reported yet. Therefore, instead of aqueous solutions, the hydrogel reaction phase might contribute to the synthesis of metal nanoparticles or nanoclusters, which could exhibit high development potential and intriguing application prospects.…”
Bovine serum albumin (BSA) reduces HAuCl4 under alkaline conditions to achieve rapid in-situ growth of gold nanoclusters (Au NCs) in hydrogels. The hydrogels doped with BSA and HAuCl4 not only...
“…The simple structure of the agarose molecule allows no interaction with chemical/biological systems and no interfering effects on the reaction; second, the hollow structure of the hydrogel offers reaction conditions for the in situ growth of nanoprobes. 26 Foremost, the reticular skeleton structure of the hydrogel is effective in rapidly stablilizing Au NPs, avoiding the nonspecific aggregation phenomenon in complex environments and biological samples. Nevertheless, in that route, cysteine molecules were preadded in the hydrogels, which served as the initial reductant reagents for the reduction of trivalent Au ions.…”
Section: Introductionmentioning
confidence: 99%
“…This work transferred the aqueous phase reaction involving plasmonic nanomaterials to a hydrogel medium. The simple structure of the agarose molecule allows no interaction with chemical/biological systems and no interfering effects on the reaction; second, the hollow structure of the hydrogel offers reaction conditions for the in situ growth of nanoprobes . Foremost, the reticular skeleton structure of the hydrogel is effective in rapidly stablilizing Au NPs, avoiding the nonspecific aggregation phenomenon in complex environments and biological samples.…”
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