Integrating ultrafast and stochastic dynamics studies of Brownian motion in molecular systems and colloidal particles

Author(s)

Oliveira, Guilherme H. ^[1] ; Nome, Rene A. ^[1]

Affiliation

^[1] State Univ Campinas UNICAMP, Inst Chem, BR-13083970 Campinas - Brazil

• Document type: Review article
• Source: CURRENT OPINION IN COLLOID & INTERFACE SCIENCE; v. 44, p. 208-219, DEC 2019.
• Web of Science Citations: 0

Abstract

Ultrafast spectroscopy and stochastic dynamics studies of chemical dynamics in solution with high resolution in both space and time have been undertaken for many years, but it is still challenging to connect fundamental knowledge obtained from stroboscopic approaches at ultrashort timescales and small length scales with that obtained by directly measuring individual particle motion at longer timescales. Therefore, it is interesting, conceptually and experimentally, to understand the similarities and differences between these two approaches to the study of chemical dynamics in condensed phase systems. We discuss recent advances in the understanding of the transition from ballistic to diffusive motion and chemical reaction rate theories and describe the significance of the findings in relation to the study of thermally activated processes at multiple time and length scales. (AU)

• FAPESP's process: 19/00290-5 - Rotational diffusion in two-dimensional colloidal glasses
• Grantee: René Alfonso Nome Silva
• Support Opportunities: Regular Research Grants
• FAPESP's process: 17/11986-5 - Research Division 1 - Dense Energy Carriers
• Grantee: Ana Flávia Nogueira
• Support Opportunities: Research Grants - Research Centers in Engineering Program
• FAPESP's process: 16/23430-9 - Exploring stochastic dynamics of nanomaterials
• Grantee: René Alfonso Nome Silva
• Support Opportunities: Regular Research Grants