Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
A synthesis method for plasmonic double-walled nanoframes was developed, where single-walled truncated octahedral nanoframes with (111) open facets and (100) solid flat planes are nested in a core-shell manner. By applying multiple chemical toolkits to Au cuboctahedrons as a starting template, Au double-walled nanoframes with controllable face-to-face nanogaps were successfully synthesized in high homogeneity in size and shape. Importantly, when the gap distance between inner and outer flat walled frames became closer, augmentation of electromagnetic near-field focusing was achieved, leading to generation of hot-zones, which was verified by surface-enhanced Raman spectroscopy. The unique optical property of Au double-walled nanoframes with high structural intricacy was carefully investigated and the SERS substrates comprising Au double-walled nanoframes with the narrowest nanogaps exhibited much improved near-field enhancement toward strongly and/or weakly adsorbing analytes, allowing for gas phase detection in chemical warfare agents, which is a huge challenge in early warning systems.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.nanolett.3c00679 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Plasmonic Nanogap-Enhanced Tunable Three-Dimensional Nanoframes in Application to Clinical Diagnosis of Alzheimer's Disease.
ACS Sens
October 2024
Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea.
Article Synopsis
- Advancements in nanotechnology have improved the creation of plasmon-enhanced nanostructures for biosensors, which is crucial for affordable medical applications.
- Metal nanoframes synthesized through wet chemistry show great potential due to their unique structures and properties, but careful design is needed for effective biosensor integration.
- Double-walled nanoframes (DWFs) were engineered to enhance detection sensitivity, achieving significant advancements in diagnosing conditions like Alzheimer's disease, indicating the importance of optimizing frame dimensions for improved sensor performance.
Ready-to-Use Free-Standing Super-Powder Made with Complex Nanoparticles for SERS.
Adv Mater
June 2024
Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea.
This study presents a straightforward and efficient synthetic approach for producing high-yield, ready-to-use, free-standing super-powder. The synthesis protocol demonstrates versatility, enabling the creation of assemblies from various nanoparticle morphologies and compositions without the need for specific substrates. Au nanorings are employed as building blocks for fabricating the super-powder, which can be used in surface-enhanced Raman spectroscopy (SERS).
View Article and Find Full Text PDFPlasmonic Double-Walled Nanoframes with Face-to-Face Nanogaps for Strong SERS Activity.
Nano Lett
August 2023
Department of Chemistry, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea.
A synthesis method for plasmonic double-walled nanoframes was developed, where single-walled truncated octahedral nanoframes with (111) open facets and (100) solid flat planes are nested in a core-shell manner. By applying multiple chemical toolkits to Au cuboctahedrons as a starting template, Au double-walled nanoframes with controllable face-to-face nanogaps were successfully synthesized in high homogeneity in size and shape. Importantly, when the gap distance between inner and outer flat walled frames became closer, augmentation of electromagnetic near-field focusing was achieved, leading to generation of hot-zones, which was verified by surface-enhanced Raman spectroscopy.
View Article and Find Full Text PDFSynthesis of Pt Double-Walled Nanoframes with Well-Defined and Controllable Facets.
ACS Nano
December 2022
Department of Chemistry, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea.
In this paper, we demonstrate the synthesis of morphologically complex nanoframes wherein a mixture of frames and thin solid planes, which we refer to as walled-nanoframes, are present in a single particle. By applying multiple chemical steps including shape evolution of Au nanocrystals and controlling chemical potential of solution for selective deposition, we successfully designed a variety of Pt nanoframes including Pt cuboctahedral nanoframes and Pt single-walled nanoframes. The rationale for on-demand chemical steps with well-faceted Au overgrowth allowed for the synthesis of double-walled nanoframes where two Pt single-walled nanoframes are concentrically overlapped in a single entity with a clearly discernible gap between the two nanoframes.
View Article and Find Full Text PDF