Your browser doesn't support javascript.
loading
Precise control over the silica shell thickness and finding the optimal thickness for the peak heat diffusion property of AuNR@SiO2.
Yang, Wonseok; Kaur, Sandeep; Kim, Yong Duk; Kim, Jung-Mu; Lee, Seung Hee; Lim, Dong-Kwon.
Afiliación
  • Yang W; KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea. dklim@korea.ac.kr.
  • Kaur S; Department of Nanoconvergence Engineering and Department of Polymer Nano-Science and Technology, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea.
  • Kim YD; KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea. dklim@korea.ac.kr.
  • Kim JM; Department of Electronic Engineering, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea.
  • Lee SH; Department of Nanoconvergence Engineering and Department of Polymer Nano-Science and Technology, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea.
  • Lim DK; KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea. dklim@korea.ac.kr.
J Mater Chem B ; 10(3): 364-372, 2022 01 19.
Article en En | MEDLINE | ID: mdl-34825907
Silica-coated gold nanorods (AuNRs) exhibit significantly enhanced photothermal effects and photoacoustic (PA) signal intensities, which is beneficial for various nanophotonic applications in materials science. However, the silica shell thickness for optimum enhancement is not fully understood and is even controversial depending on the physical state of the silica shell. This is because of the lack of systematic investigations of the nanoscale silica shell thickness and the photothermal effect. This study provides a robust synthetic method to control the silica shell thickness at the nanoscale and the physical state-dependent heat diffusion property. The selected base and solvent system enabled the production of silica-coated AuNRs (AuNR@SiO2) with silica shell thicknesses of 5, 10, 15, 20, 25, 30, 35, and 40 nm. AuNRs with a 20 nm silica shell showed the highest photothermal effect with a 1.45-times higher photothermal efficiency than that of AuNRs without a silica shell. The low density of the silica shell on the AuNRs showed a low photothermal effect and photostability. It was found that the disruption of cetyltrimethyl ammonium bromide (CTAB) layers on the AuNRs was responsible for the low photostability of the AuNRs. The simulation study for the heat diffusion property showed facilitated heat diffusion in the presence of a 20 nm silica shell. In a cell-based study, AuNRs with a 20 nm silica shell showed the most sensitive photothermal effect for cell death. The results of this robust study can provide conclusive conditions for the optimal silica shell thickness to obtain the highest photothermal effect, which will be useful for the future design of nanomaterials in various fields of application.
Asunto(s)
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Dióxido de Silicio / Nanotubos Tipo de estudio: Diagnostic_studies Límite: Humans Idioma: En Revista: J Mater Chem B Año: 2022 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Dióxido de Silicio / Nanotubos Tipo de estudio: Diagnostic_studies Límite: Humans Idioma: En Revista: J Mater Chem B Año: 2022 Tipo del documento: Article Pais de publicación: Reino Unido