TY - JOUR
T1 - Novel photoexcitation method for light-addressable potentiometric sensor with higher spatial resolution
AU - Guo, Yuanyuan
AU - Seki, Kosuke
AU - Miyamoto, Ko Ichiro
AU - Wagner, Torsten
AU - Schöning, Michael J.
AU - Yoshinobu, Tatsuo
PY - 2014/6
Y1 - 2014/6
N2 - A novel photoexcitation method for the light-addressable potentiometric sensor (LAPS) is proposed to achieve a higher spatial resolution of chemical images. The proposed method employs a combined light source that consists of a modulated light probe, which generates the alternating photocurrent signal, and a ring of constant illumination surrounding it. The constant illumination generates a sheath of carriers with increased concentration which suppresses the spread of photocarriers by enhanced recombination. A device simulation was carried out to verify the effect of constant illumination on the spatial resolution, which demonstrated that a higher spatial resolution can be obtained.
AB - A novel photoexcitation method for the light-addressable potentiometric sensor (LAPS) is proposed to achieve a higher spatial resolution of chemical images. The proposed method employs a combined light source that consists of a modulated light probe, which generates the alternating photocurrent signal, and a ring of constant illumination surrounding it. The constant illumination generates a sheath of carriers with increased concentration which suppresses the spread of photocarriers by enhanced recombination. A device simulation was carried out to verify the effect of constant illumination on the spatial resolution, which demonstrated that a higher spatial resolution can be obtained.
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U2 - 10.7567/APEX.7.067301
DO - 10.7567/APEX.7.067301
M3 - Article
AN - SCOPUS:84904662203
VL - 7
JO - Applied Physics Express
JF - Applied Physics Express
SN - 1882-0778
IS - 6
M1 - 067301
ER -