Imasda Rahmatulloh, Retna Apsari, Syahidatun Na'imah, Tahta Amrillah, Samian, Dyah Hikmawati, Masruroh, Hendra Susanto, M. Yasin, Sulaiman W. Harun
We proposed a graphene coated microfiber-based sensor for enhancing Aflatoxin B1 detection at room temperature. The heat-and-pull technique was used to fabricate the microfiber while the graphene layer was coated using a drop-casting technique. Aflatoxin samples are used as a sensor sensing area soaking solution, whereby the prepared graphene-coated microfiber was used as a sensor probe. The sensing is based on the modulation of transmission intensity and wavelength shift induced by the alteration of concentration of aflatoxin B1 from 0 ppm to 10 ppm. There is an increase in sensitivity from 0.129 dBm/ppm to 0.187 dBm/ppm and an increase in resolution from 0.17 ppm to 0.037 ppm by coating graphene on the microfiber sensor. For the graphene coated microfiber-based sensor, the wavelength shift from 1525.37 nm to 1525.19 nm was obtained when the aflatoxin B1 concentration was increased from 0 to 10 ppm. It reveals a sensitivity of 0.018 nm/ppm with a linearity of more than 90 %. This finding shows that the proposed sensor can be used to detect various concentration of Aflatoxin sample with the ability to offer real time measurement. © 2024
Department of Physics, Faculty of Science and Technology, Universitas Airlangga, Jl.Mulyorejo, Surabaya, 60115, Indonesia; Center for Advanced Photonics, Faculty of Science and Technology, Universitas Airlangga, Surabaya, 60115, Indonesia; Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Brawijaya, 65145, Indonesia; Department of Engineering, Faculty of Advanced Technology and Multidiscipline, Universitas Airlangga, Jl. Mulyorejo, Surabaya, 60115, Indonesia; Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Malang, 65145, Indonesia; Department of Electrical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur, 50603, Malaysia
