FABRICATION OF REUSABLE AND LOW-COST SERS SUBSTRATES FOR EXPLOSIVES DETECTION
Surface-Enhanced Raman Spectroscopy (SERS) is a highly sensitive and powerful analytical technique for molecular identification and analysis and used in various fields. SERS uses the plasmonic effect on the surface of specific substrates, such as grating plasmonic, to enhance the Raman signal of...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/77720 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Surface-Enhanced Raman Spectroscopy (SERS) is a highly sensitive and powerful
analytical technique for molecular identification and analysis and used in various
fields. SERS uses the plasmonic effect on the surface of specific substrates, such
as grating plasmonic, to enhance the Raman signal of the sample. However,
the fabrication of grating structures as substrates is challenging and often comes
with high costs. This research presents an approach to address this challenge by
developing a low-cost SERS substrate using DVDs as a grating-based substrate
coated with gold nanoparticles. The fabricated substrate will be used as a SERS
substrate to detect explosives; trinitrotoluene (TNT), tetryl, Research Department
Explosive (RDX), and pentaerythritol tetranitrate (PETN). According to our
research, the concentration of explosives that can be detected is up to 0.01M for
TNT, PETN, and Tetryl and 0.1M for RDX. Furthermore, a reusability test was
conducted for the SERS substrate from DVDs by cleaning the substrate using an
acetone solution. Based on the results of the reusability test, the substrate can be
reused up to three times. The grating period used is 713 nm, and the thickness of
the gold nanoparticle used is 50 nm.
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