TY  - JOUR
AU  - Brndiarova, Jana
AU  - Šiffalovič, Peter
AU  - Hulman, Martin
AU  - Kalosi, Anna
AU  - Bodik, Michal
AU  - Skakalova, Viera
AU  - Micusik, Matej
AU  - Marković, Zoran M.
AU  - Majkova, Eva
AU  - Frohlich, Karol
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8676
AB  - Ubiquitous carbon nanomaterials have great potential for emerging technologies, but they also pose a threat to human health at the end of their lifecycle, especially when they are introduced into waste or ground waters. Graphene field-effect transistors (GFET) and real time in situ confocal Raman microscopy (CRM) were employed to detect a submonolayer of carbon quantum dots (CQDs) in water. An effective GFET channel was formed on exfoliated and chemical vapor deposited (CVD) graphene. The adsorption of CQDs was monitored by measuring conductance changes in GFETs. The graphene channel was functionalized with (3-aminopropyl) triethoxysilane (APTES), which allowed for easy observation of a shift in the charge neutrality point (CNP) when the graphene channel was exposed to CQDs. The affinity of the CQD's carboxyl terminal groups to the aminofunctionalized channel enabled a highly sensitive CQD detection based on changes in the GFET conductivity. The adsorption of the CQDs induced a positive shift of the CNP with a limit of detection at concentrations of 239 ppm and 62 ppm for the exfoliated and CVD graphene, respectively. A supporting study of graphene functionalization and CQD adsorption was performed by real time in situ CRM, ellipsometry, and ex situ X-ray photoelectron spectroscopy. © 2019 Author(s).
T2  - Journal of Applied Physics
T1  - Functionalized graphene transistor for ultrasensitive detection of carbon quantum dots
VL  - 126
IS  - 21
SP  - 214303
DO  - 10.1063/1.5120757
ER  - 

@article{
author = "Brndiarova, Jana and Šiffalovič, Peter and Hulman, Martin and Kalosi, Anna and Bodik, Michal and Skakalova, Viera and Micusik, Matej and Marković, Zoran M. and Majkova, Eva and Frohlich, Karol",
year = "2019",
abstract = "Ubiquitous carbon nanomaterials have great potential for emerging technologies, but they also pose a threat to human health at the end of their lifecycle, especially when they are introduced into waste or ground waters. Graphene field-effect transistors (GFET) and real time in situ confocal Raman microscopy (CRM) were employed to detect a submonolayer of carbon quantum dots (CQDs) in water. An effective GFET channel was formed on exfoliated and chemical vapor deposited (CVD) graphene. The adsorption of CQDs was monitored by measuring conductance changes in GFETs. The graphene channel was functionalized with (3-aminopropyl) triethoxysilane (APTES), which allowed for easy observation of a shift in the charge neutrality point (CNP) when the graphene channel was exposed to CQDs. The affinity of the CQD's carboxyl terminal groups to the aminofunctionalized channel enabled a highly sensitive CQD detection based on changes in the GFET conductivity. The adsorption of the CQDs induced a positive shift of the CNP with a limit of detection at concentrations of 239 ppm and 62 ppm for the exfoliated and CVD graphene, respectively. A supporting study of graphene functionalization and CQD adsorption was performed by real time in situ CRM, ellipsometry, and ex situ X-ray photoelectron spectroscopy. © 2019 Author(s).",
journal = "Journal of Applied Physics",
title = "Functionalized graphene transistor for ultrasensitive detection of carbon quantum dots",
volume = "126",
number = "21",
pages = "214303",
doi = "10.1063/1.5120757"
}

Brndiarova, J., Šiffalovič, P., Hulman, M., Kalosi, A., Bodik, M., Skakalova, V., Micusik, M., Marković, Z. M., Majkova, E.,& Frohlich, K.. (2019). Functionalized graphene transistor for ultrasensitive detection of carbon quantum dots. in Journal of Applied Physics, 126(21), 214303.
https://doi.org/10.1063/1.5120757

Brndiarova J, Šiffalovič P, Hulman M, Kalosi A, Bodik M, Skakalova V, Micusik M, Marković ZM, Majkova E, Frohlich K. Functionalized graphene transistor for ultrasensitive detection of carbon quantum dots. in Journal of Applied Physics. 2019;126(21):214303.
doi:10.1063/1.5120757 .

Brndiarova, Jana, Šiffalovič, Peter, Hulman, Martin, Kalosi, Anna, Bodik, Michal, Skakalova, Viera, Micusik, Matej, Marković, Zoran M., Majkova, Eva, Frohlich, Karol, "Functionalized graphene transistor for ultrasensitive detection of carbon quantum dots" in Journal of Applied Physics, 126, no. 21 (2019):214303,
https://doi.org/10.1063/1.5120757 . .