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Unveiling Enhanced Electrostatic Repulsion in Silica Nanosphere Assembly: Formation Dynamics of Body-Centered-Cubic Colloidal Crystals by Qingsong Fan; Zhiwei Li; Yichen Li; Aiqin Gao; Yuzhi Zhao; Daniel Yang; Chenhui Zhu; Tatiana V. Brinzari; Guofeng Xu; Long Pan; Luat T. Vuong; Yadong Yin is a Chemistry article available to read on EtoBox.
What is Unveiling Enhanced Electrostatic Repulsion in Silica Nanosphere Assembly: Formation Dynamics of Body-Centered-Cubic Colloidal Crystals about?
We demonstrate the effective establishment of longrange electrostatic interactions among colloidal silica nanospheres through acid treatment, enabling their assembly into colloidal crystals at remarkably low concentrations. This novel method overcomes the conventional limitation in colloidal silica assembly by removing entrapped NH 4 + ions and enhancing the electrical double layer (EDL) thickness, offering a time-efficient alternative to increase electrostatic interactions compared with methods like dialysis. The increased EDL thickness facilitates the assembly of SiO 2 nanospheres into a body-centered-cubic lattice structure at low particle concentrations, allowing for broad spectrum tunability and high tolerance to particle size polydispersity. Further, we uncover a disorder-order transition during colloidal crystallization at low particle concentrations, with the optimal concentration for crystal formation governed by both thermodynamic and kinetic factors. This work not only provides insights into assembly mechanisms but also paves the way for the design and functionalization of colloidal silica-based photonic crystals in diverse applications.
Who reads Unveiling Enhanced Electrostatic Repulsion in Silica Nanosphere Assembly: Formation Dynamics of Body-Centered-Cubic Colloidal Crystals?
It is typically read by researchers, students, and practitioners in Chemistry.
- Author
- Qingsong Fan; Zhiwei Li; Yichen Li; Aiqin Gao; Yuzhi Zhao; Daniel Yang; Chenhui Zhu; Tatiana V. Brinzari; Guofeng Xu; Long Pan; Luat T. Vuong; Yadong Yin
- Publisher
- American Chemical Society (ACS)
- Published
- 2023
- Language
- EN
- Field
- Chemistry (Physical Sciences)