Open AccessOptimization of sputtered Au film on grating structure as SERS substrate for detection of pesticide
Author(s) -
Afrida Hafizhatul Ulum,
Lisa Destarina,
Nina Siti Aminah,
Nantarat Srisuai,
Sakoolkan Boonruang,
Noppadon Nuntawong,
Mati Horprathum,
Mitra Djamal
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1428/1/012035
Subject(s) - substrate (aquarium) , materials science , sputter deposition , raman scattering , raman spectroscopy , thin film , deposition (geology) , scanning electron microscope , sputtering , analytical chemistry (journal) , optoelectronics , nanotechnology , optics , chemistry , chromatography , composite material , paleontology , oceanography , physics , sediment , geology , biology
Here, we report an efficient approach to optimize the performance of surface enhanced Raman scattering (SERS) substrate. The geometry of the SERS substrate consists of the Au film deposited on polymer grating. The SERS substrate were fabricated by the laser interference lithography (LIL) and magnetron sputtering of Au thin films. The effect of the Au thin film prepared by magnetron sputtering at different deposition time (5-180 s) and operated pressure (3-5 mTorr). The morphology of the obtained samples was observed by field-emission scanning electron microscopy (FE-SEM). The results indicated that optimal SERS substrate with deposition time of 180 s and 3 mTorr-operated pressure was obtained. The limit of detection for methylene blue (MB) and methyl parathion were evaluated at 10 -4 M and 10 -2 M, respectively. Moreover, our SERS substrate shows the application of a portable Raman spectrophotometer which also promising for on-site pesticide substance detection.