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Graphene based nanosensor for aqueous phase detection of nitroaromatics

S. Avaz ; R. B. Roy ; Venkata Raghu Mokkapati (Institutionen för biologi och bioteknik, Systembiologi) ; A. Bozkurt ; Santosh Pandit (Institutionen för biologi och bioteknik, Systembiologi) ; Ivan Mijakovic (Institutionen för biologi och bioteknik, Systembiologi) ; Y. Z. Menceloglu
Rsc Advances (2046-2069). Vol. 7 (2017), 41, p. 25519-25527.
[Artikel, refereegranskad vetenskaplig]

A graphene-based nanosensor was fabricated to selectively detect nitrotriazolone (NTO) molecules with a molecularly imprinted film via simple electrical measurements. Molecularly imprinted polymer comprising chitosan was used as sensitive layer. Gold electrodes for electrical measurements were lithographically fabricated on Si/SiO2 substrate, followed by monolayer graphene transfer and polymeric film coating. Monolayer graphene and molecularly imprinted polymer were characterized by ATR-FTIR, UV-Vis, SEM and Raman spectroscopy. Transfer-length measurements (TLM) indicate that the sensor selectively and linearly responds against aqueous NTO solutions within a wide range of concentration of 0.01-0.1 mg mL(-1) that covers the lowest toxic level of NTO determined by USEPA. This nanosensor with embedded electrodes is re-usable and suitable for field applications, offering real-time electrical measurements unlike current techniques where complex analytics are required.



Denna post skapades 2017-07-12.
CPL Pubid: 250671

 

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Institutioner (Chalmers)

Institutionen för biologi och bioteknik, Systembiologi

Ämnesområden

Analytisk kemi

Chalmers infrastruktur