TY - JOUR
T1 - Controlled bridge growth of ZnO nanowires on laser-scribed graphene-based devices for NO gas detection
AU - Chou, Cheng Ying
AU - Tseng, Shih Feng
AU - Chang, Tien Li
AU - Tu, Chen Ting
AU - Han, Hsieh Cheng
N1 - Funding Information:
The authors thank the Ministry of Science and Technology (MOST) of Taiwan for financially supporting this research under contract Nos. MOST 107-2221-E-003-006-MY2, MOST 107-2221-E-027-129-MY2, MOST 108-2622-E-003-001-CC3, and MOST 108-2622-E-027-019-CC3.
Funding Information:
The authors thank the Ministry of Science and Technology ( MOST ) of Taiwan for financially supporting this research under contract Nos. MOST 107-2221-E-003-006-MY2 , MOST 107-2221-E-027-129-MY2 , MOST 108-2622-E-003-001-CC3 , and MOST 108-2622-E-027-019-CC3 .
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/4/1
Y1 - 2020/4/1
N2 - This research proposed a facile low-cost hydrothermal method to control a bridge growth of ZnO nanowires on laser-scribed graphene-based devices applied for NO gas detection. The picosecond laser processing system was used to scribe graphene/glass substrates and to form V-shaped grooves. During the growing process of ZnO nanowires, the surfactant solution of methanol was added into the growth solution to decrease surface tension of V-shaped grooves. Hence, the grown ZnO nanowires could increase their contact area from both sides of the groove edge. The experimental results showed that the V-shaped grooves of graphene/glass substrates were obtained by using optimal laser processing parameters including the pulse repetition rate of 300 kHz, scanning speed of 100 mm/s, laser fluence of 1.81 J/cm2, and number of scribed passes of 3 times. Then, the ZnO nanowires were grown via the immersed processes of the seed layer solution for 80 min and the growth solution with surfactant solution for 8 h. Consequently, the ZnO nanowires had a lowest electrical resistance of 453 Ω. Moreover, the sensitivities of gas sensors were approximately 14.7%, 21.2%, and 40.2% when the ZnO nanowires were exposed to 50 ppm, 150 ppm, and 300 ppm NO gas, respectively.
AB - This research proposed a facile low-cost hydrothermal method to control a bridge growth of ZnO nanowires on laser-scribed graphene-based devices applied for NO gas detection. The picosecond laser processing system was used to scribe graphene/glass substrates and to form V-shaped grooves. During the growing process of ZnO nanowires, the surfactant solution of methanol was added into the growth solution to decrease surface tension of V-shaped grooves. Hence, the grown ZnO nanowires could increase their contact area from both sides of the groove edge. The experimental results showed that the V-shaped grooves of graphene/glass substrates were obtained by using optimal laser processing parameters including the pulse repetition rate of 300 kHz, scanning speed of 100 mm/s, laser fluence of 1.81 J/cm2, and number of scribed passes of 3 times. Then, the ZnO nanowires were grown via the immersed processes of the seed layer solution for 80 min and the growth solution with surfactant solution for 8 h. Consequently, the ZnO nanowires had a lowest electrical resistance of 453 Ω. Moreover, the sensitivities of gas sensors were approximately 14.7%, 21.2%, and 40.2% when the ZnO nanowires were exposed to 50 ppm, 150 ppm, and 300 ppm NO gas, respectively.
KW - Graphene/glass substrate
KW - Hydrothermal method
KW - NO gas detection
KW - Picosecond laser
KW - ZnO nanowire
UR - http://www.scopus.com/inward/record.url?scp=85078569595&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85078569595&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2019.145204
DO - 10.1016/j.apsusc.2019.145204
M3 - Article
AN - SCOPUS:85078569595
SN - 0169-4332
VL - 508
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 145204
ER -