26. Prof. Ricardo Garcia - Atomic-Scale Imaging of Solid-Water Interfaces

Описание: Full title:  Interfacial Liquid Water: Atomic-Scale Imaging of Solid-Water Interfaces
Speaker: Prof. Ricardo Garcia (Instituto de Ciencia de Materiales de Madrid, CSIC, Madrid, Spain)

00:00 - Introduction
02:18 - Beginning of the talk
04:52 - AFM: history and basics
13:12 - Amplitude modulation AFM in liquids
18:30 - Resolution of AFM
28:39 - AFM in liquids
47:05 - Calibration of cantilevers
49:57 - Electrostatic forces during AFM in liquids
53:16 - Examples of atomic-resolution AFM
55:50 - High-speed AFM in liquids
1:01:45 - 3D-AFM of solid-liquid interfaces

Q&A:
1:09:16 - Q1: Lateral domains of adsorbates
1:10:50 - Q2: Stability of the instrument for atomic imaging
1:12:02 - Q3: Surface perturbation by AFM during imaging
1:14:00 - Q4: Measurement of nanoparticles on a surface
1:16:22 - Q5: Bi-modal or AM-AFM for 3D maps
1:19:06 - Q6: In situ AFM during electrochemical reactions
1:23:30 - Q7: Role of convection induced by cantilever
1:26:29 - Q8: Observing molecules undergoing electrocatalysis
1:28:21 - Q9: Time scale of imaging and operando microscopy
1:34:37 - Q10: Functionalized tips in liquids
1:36:41 - Q11: Tip-induced chemical reactions in liquids
1:37:22 - Q12: Time scale of imaging and operando microscopy (# 2)
1:40:45 - Q13: Electrostatic effect from the double layer
1:46:22 - Q14: Importance of atomistic simulations for data interpretation
1:48:40 - Q15: Atomic-scale AFM vs STM imaging in liquids

https://www.electrochemicalcolloquium...

#microscopy #AFM #chemistry

Abstract: 
Solid-water interfaces have a prominent role in a variety of fields such as surface science, geochemistry, electrochemistry, energy storage or molecular and cell biology. Liquids near a solid surface form an interfacial layer where the molecular structure is different from that of the bulk. Yet the molecular-scale understanding of the interactions of liquid water with solid interfaces is unsatisfactory for the lack of high-spatial resolution methods. Here I will present an introduction to force microscopy methods to image solid-liquid interfaces. More specifically, I will introduce the state-of-the-art AFM method (3D AFM) devoted to generate three-dimensional atomic-scale resolution images of solid-liquid interfaces. Those images provide a new understanding on how water interacts with real hydrophobic and hydrophilic surfaces.