Ahn. Lab at Yonsei Chemistry
Materials for Electrochemical Energy Conversion
02-2123-2634
Gas Sensing and Mapping
using SECM
New footprints to electrochemical 3D gas and vapor analysis
Fast and Sensitive
Probe-type Sensor
A novel membraneless gas sensing nanoprobe was developed based on a hanging drop ionic liquid electrochemical cell. An ultrasmall (<500 nm) working electrode and small volume electrochemical cell allowed for an impressively low detection limit and a fast response time, which is unusually fast for an electrochemical gas sensor.
Gas phase Scanning Electrochemical Microscopy
The pulled capillary form factor of the nanoprobe was found compatible with scanning probe techniques, the demonstration of which was made by application as a tip electrode in gas phase scanning electrochemical microscopy (SECM). In the SECM experiments, the nanoprobe exhibited micrometer scale spatial resolution with ease. This unique probe design developed here may potentially be engineered into versatile sensors for various volatile molecules, such as those pertinent to hazard analysis and biomedical diagnosis.
