Title :
Teflon wetting and dewetting on EWOD device for chemiluminescence detector
Author :
Xiangyu Zeng ; Kaidi Zhang ; Guowei Tao ; Shih-Kang Fan ; Jia Zhou
Author_Institution :
Fudan Univ., Shanghai, China
Abstract :
A hydrophobicity recoverable EWOD (electrowetting-on-dielectric) based chemiluminescence detector with an integrated signal and heater electrode was developed. X-ray-photoelectron-spectroscopy (XPS) was used to reveal the wetting and dewetting mechanism of Teflon on the EWOD device. It was found that the C-O bond formed on the surface of Teflon after the chemiluminescence reaction leaded to the surface permanent wetting. To recover the contact angle of the Teflon surface, the recovery threshold time and heating temperature were proposed experimentally for dewetting to release C-O bond.
Keywords :
X-ray photoelectron spectra; carbon compounds; chemical sensors; chemiluminescence; hydrophobicity; microfluidics; microsensors; wetting; C-O; EWOD device; Teflon dewetting; X-ray photoelectron spectroscopy; XPS; chemiluminescence detector; contact angle; electrowetting-on-dielectric; heater electrode; hydrophobicity recoverable EWOD; integrated signal electrode; recovery threshold time; surface permanent wetting; Annealing; Biosensors; Chemical elements; Detectors; Electrodes; Heat recovery; Proteins;
Conference_Titel :
Micro Electro Mechanical Systems (MEMS), 2014 IEEE 27th International Conference on
Conference_Location :
San Francisco, CA
DOI :
10.1109/MEMSYS.2014.6765824
