Label-free DNA sensor based on organic thin film transistors

Feng Yan, Sheung Man Mok, Jinjiang Yu, Helen L W Chan, Mo Yang
Biosensors & Bioelectronics 2009 January 1, 24 (5): 1241-5
Organic thin film transistors (OTFTs) are excellent candidates for the application on disposable sensors due to their potentially low-cost fabrication process. A novel DNA sensor based on OTFTs with semiconducting polymer poly(3-hexylthiophene) has been fabricated by solution process. Both single- and double-strand DNA molecules are immobilized on the surface of the Au source/drain electrodes of different OTFT devices, producing a dramatic change in the performance of the devices, which is attributed to the increase of the contact resistances at the source/drain electrodes. Single-strand DNA and double-strand DNA are differentiated successfully in the experiments indicating that this is a promising technique for sensing DNA hybridization without labelling.

Full Text Links

Find Full Text Links for this Article


You are not logged in. Sign Up or Log In to join the discussion.

Related Papers

Remove bar
Read by QxMD icon Read

Save your favorite articles in one place with a free QxMD account.


Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"