title: Highly-Sensitive Surface-Enhanced Raman Spectroscopy (SERS)-based Chemical Sensor using 3D Graphene Foam Decorated with Silver Nanoparticles as SERS substrate.
abstract: In this work, a novel platform for surface-enhanced Raman spectroscopy (SERS)-based chemical sensors utilizing three-dimensional microporous graphene foam (GF) decorated with silver nanoparticles (AgNPs) is developed and applied for methylene blue (MB) detection. The results demonstrate that silver nanoparticles significantly enhance cascaded amplification of SERS effect on multilayer graphene foam (GF). The enhancement factor of AgNPs/GF sensor is found to be four orders of magnitude larger than that of AgNPs/Si substrate. In addition, the sensitivity of the sensor could be tuned by controlling the size of silver nanoparticles. The highest SERS enhancement factor of ∼ 5 × 10(4) is achieved at the optimal nanoparticle size of 50 nm. Moreover, the sensor is capable of detecting MB over broad concentration ranges from 1 nM to 100 μM. Therefore, AgNPs/GF is a highly promising SERS substrate for detection of chemical substances with ultra-low concentrations.
authors.affiliation: Microelectronics and Embedded Systems Department, Asian Institute of Technology, Pathumtani, 12120, Thailand.|Department of Computer Engineering, Khon Kaen University, Khon Kaen, 40002, Thailand.
authors.forename: Chavis
authors.initials: C
authors.lastname: Srichan
authors.affiliation: Microelectronics and Embedded Systems Department, Asian Institute of Technology, Pathumtani, 12120, Thailand.
authors.forename: Mongkol
authors.initials: M
authors.lastname: Ekpanyapong
authors.affiliation: National Electronics and Computer Technology Center (NECTEC), 12120, Thailand.
authors.forename: Mati
authors.initials: M
authors.lastname: Horprathum
authors.affiliation: National Electronics and Computer Technology Center (NECTEC), 12120, Thailand.
authors.forename: Pitak
authors.initials: P
authors.lastname: Eiamchai
authors.affiliation: National Electronics and Computer Technology Center (NECTEC), 12120, Thailand.
authors.forename: Noppadon
authors.initials: N
authors.lastname: Nuntawong
authors.affiliation: National Electronics and Computer Technology Center (NECTEC), 12120, Thailand.
authors.forename: Ditsayut
authors.initials: D
authors.lastname: Phokharatkul
authors.affiliation: Microelectronics and Embedded Systems Department, Asian Institute of Technology, Pathumtani, 12120, Thailand.
authors.forename: Pobporn
authors.initials: P
authors.lastname: Danvirutai
authors.affiliation: Microelectronics and Embedded Systems Department, Asian Institute of Technology, Pathumtani, 12120, Thailand.
authors.forename: Erik
authors.initials: E
authors.lastname: Bohez
authors.affiliation: National Electronics and Computer Technology Center (NECTEC), 12120, Thailand.
authors.forename: Anurat
authors.initials: A
authors.lastname: Wisitsoraat
authors.affiliation: National Electronics and Computer Technology Center (NECTEC), 12120, Thailand.
authors.forename: Adisorn
authors.initials: A
authors.lastname: Tuantranont