Title :
Design and evaluation of a microcantilever aptasensor
Author :
Yang Choon Lim ; Kouzani, Abbas Z. ; Wei Duan ; Dai, Xiujuan J. ; Kaynak, Akif ; Mair, Douglas
Author_Institution :
Melbourne Centre for Nanofabrication, Melbourne, VIC, Australia
Abstract :
Aptamers enhance flexibility in biosensor design. An aptasensor employs aptamers as a biological recognition element for biosensing. This paper presents design, fabrication, and evaluation of a microcantilever aptasensor. To identify and avoid potential bottlenecks in the aptasensor design, the parameters of the aptasensor are investigated through modelling and simulation. Next, thin SU-8 microcantilevers are fabricated to form the aptasensor. Characterization of the fabricated aptasensor is presented. Next, a plasma-based surface funtionalisation method is used to immobilize aptamers on the atasensor. Finally, an evaluation of the performance of the aptasensor is performed through detection of thrombin molecules. The evaluation results are presented and discussed.
Keywords :
biological techniques; biosensors; cantilevers; microfabrication; microsensors; aptamers immobilization; biological recognition element; biosensor design; microcantilever aptasensor; plasma-based surface funtionalisation method; thin SU-8 microcantilever; thrombin molecule detection; Laser beams; Plasmas; Sensitivity; Sensors; Surface cleaning; Surface morphology; aptasensor; detection; microcantilever;
Conference_Titel :
Circuits and Systems (ISCAS), 2014 IEEE International Symposium on
Conference_Location :
Melbourne VIC
Print_ISBN :
978-1-4799-3431-7
DOI :
10.1109/ISCAS.2014.6865105
