Van der Waals Colloidal Crystals.

Autor: Cho Y; KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea., Park SH; KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea., Kwon M; Department of Biomicrosystem Technology, Korea University, Seoul, 02841, Republic of Korea., Kim HH; KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea., Huh JH; KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea.; Department of Applied Physics, Hanyang University, Ansan, 15588, Republic of Korea., Lee S; KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea.; Department of Biomicrosystem Technology, Korea University, Seoul, 02841, Republic of Korea.; Department of Integrated Energy Engineering (College of Engineering) and KU Photonics Center, Korea University, Seoul, 02841, Republic of Korea.; Center for Opto-Electronic Materials and Devices, Post-Silicon Semiconductor Institute, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea.
Jazyk: Catalan; Valencian
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2024 Jun; Vol. 36 (23), pp. e2312748. Date of Electronic Publication: 2024 Mar 13.
DOI: 10.1002/adma.202312748
Abstrakt: A general guiding principle for colloidal crystallization is to tame the attractive enthalpy such that it slightly overwhelms the repulsive interaction. As-synthesized colloids are generally designed to retain a strong repulsive potential for the high stability of suspensions, encoding appropriate attractive potentials into colloids has been key to their crystallization. Despite the myriad of interparticle attractions for colloidal crystallization, the van der Waals (vdW) force remains unexplored. Here, it is shown that the implementation of gold cores into silica colloids and the resulting vdW force can reconfigure the pair potential well depth to the optimal range between -1 and -4 k B T at tens of nanometer-scale colloidal distances. As such, colloidal crystals with a distinct liquid gap can be formed, which is evidenced by photonic bandgap-based diffractive colorization.
(© 2024 Wiley‐VCH GmbH.)
Databáze: MEDLINE
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