Open AccessFabrication and study of Raman signal enhancement of pyramid/nano-Ag structured Silic substrate
Author(s) -
Nguyệt Đậu Trần Ánh,
Hiếu Văn Võ Kim,
Thanh Vân Trần Thị,
Luận Huỳnh Nguyễn Thanh
Publication year - 2021
Publication title -
kiểm nghiệm và an toàn thực phẩm/kiểm nghiệm và an toàn thực phẩm (online)
Language(s) - English
Resource type - Journals
eISSN - 2734-9152
pISSN - 2615-9252
DOI - 10.47866/2615-9252/vjfc.2767
Subject(s) - materials science , substrate (aquarium) , silicon , rhodamine 6g , raman spectroscopy , layer (electronics) , pyramid (geometry) , porous silicon , fabrication , corrosion , optoelectronics , chemical engineering , nanotechnology , composite material , optics , molecule , chemistry , organic chemistry , medicine , oceanography , physics , alternative medicine , pathology , engineering , geology
The pyramid-structured silicon substrate was successfully fabricated by a chemical corrosion method with an average thickness of about 1 - 3 μm with the optimal parameters such as corrosion temperature of 70oC, corrosion time of 5 min, concentration KOH of 3 M and isopropyl alcohol concentration of 1 M. After that, the silver nanoparticles layer (thickness 20 nm) was coated on the silicon substrate by a sputtering method to enhance the SERS signal. The results proved that the Pyramid/nano Ag structure silicon substrate showed the enhancement effect of Raman signal, and Rhodamine 6G pigment in food at low concentration (10-6 M) was detected and the enhancement factor was 9.7 × 102.