A Label-Free and Ultrasensitive Immunosensor for Detection of Human Chorionic Gonadotrophin Based on Graphene FETs.
Biosensors (Basel)
; 7(3)2017 Jul 12.
Article
in En
| MEDLINE
| ID: mdl-28704926
ABSTRACT
We report on a label-free immunosensor based on graphene field effect transistors (G-FETs) for the ultrasensitive detection of Human Chorionic Gonadotrophin (hCG), as an indicator of pregnancy and related disorders, such as actopic pregnancy, choriocarcinoma and orchic teratoma. Pyrene based bioactive ester was non-covalently anchored onto the graphene channel in order to retain the sp² lattice. The G-FET transfer characteristics showed repeatable and reliable responses in all surface modifying steps using a direct current (DC) readout system. The hCG concentration gradient showed a detection limit of ~1 pg·mL-1. The proposed method facilitates the cost-effective and viable production of graphene point-of-care devices for clinical diagnosis.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Biosensing Techniques
/
Chorionic Gonadotropin
/
Graphite
Type of study:
Diagnostic_studies
Limits:
Female
/
Humans
/
Pregnancy
Language:
En
Journal:
Biosensors (Basel)
Year:
2017
Type:
Article
Affiliation country:
United kingdom