Journal
ACS NANO
Volume 4, Issue 6, Pages 3201-3208Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn100780v
Keywords
reduced graphene oxide; micropatterns; field-effect transistors flexible electronics; sensors
Categories
Funding
- MOE [AcRF Tier 1 (RG 20/07)]
- NRF [CRP (NRF-CRP2-2007-01)]
- A*STAR [092 101 0064, 072 101 0020]
- Centre for Biomimetic Sensor Science at NTU in Singapore
- 973 project [2009CB930600]
- NNSFC [20704023, 60876010, 60706017, 20774043]
- Chinese Ministry of Education [208050, 707032, NCET-07-0446]
- NSF of Jiangsu Province [07KJB150082, BK2008053, 08KJB510013, SJ209003, TJ2070351]
- Research Fund for Postgraduate Innovation Project of Jiangsu Province [CX0813_083Z]
- STTTP [2009120]
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Recently, the field-effect transistors (FETs) with graphene as the conducting channels have been used as a promising chemical and biological sensors. However, the lack of low cost and reliable and large-scale preparation of graphene films limits their applications. In this contribution, we report the fabrication of centimeter-long, ultrathin (1-3 nm), and electrically continuous micropatterns of highly uniform parallel arrays of reduced graphene oxide (rGO) films on various substrates including the flexible polyethylene terephthalate (PET) films by using the micromolding in capillary method. Compared to other methods for the fabrication of graphene patterns, our method is fast, facile, and substrate independent. In addition, we demonstrate that the nanoelectronic FETs based on our rGO patterns are able to label-freely detect the hormonal catecholamine molecules and their dynamic secretion from living cells.
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