Related Experiment Video
Updated: Feb 14, 2026

A System for Tracking the Dynamics of Social Preference Behavior in Small Rodents
Published on: November 21, 2019
Observing different dynamic behaviors of weakly and strongly adsorbed polystyrene chains at interfaces
Xu Li1, Xiaofeng Han, Xiaoliang Wang
1State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University, Nanjing, 210096, Jiangsu Province, P. R. China. lxl@seu.edu.cn.
Abstract:
Understanding the dynamic behavior of polymer chains adsorbed onto a solid surface is of great importance for elucidating polymer-surface interactions. Here by using sum frequency generation (SFG) vibrational spectroscopy, we probed the conformational changes of weakly adsorbed and strongly adsorbed polystyrene (PS) chains on sapphire surfaces perturbed by a nonsolvent (deuterated water, D2O) and a good solvent (carbon tetrachloride, CCl4). The SFG results indicated that the PS chains in the weakly adsorbed state were flexible and the chain conformation could easily be altered. Differently, the PS chains in the strongly adsorbed state were rigid and the chain conformation could not be changed. The local structural variations of the weakly and strongly adsorbed PS chains at the interfaces were also discussed in detail with respect to the SFG spectral characteristics. These intriguing experimental results shed light on our understanding of molecular behaviors of polymer chains adsorbed onto a solid surface.
Related Concept Videos
Weak Base Solutions
Weak Acid Solutions
Titration of a Weak Acid with a Weak Base
As a result, there is no simple...
Naturalistic Observations
Titration Calculations: Weak Acid - Strong Base
For the titration of 25.00 mL of 0.100 M CH3CO2H with 0.100 M NaOH, the reaction can be represented as:
Protein-protein Interfaces

