1. Light sensors Chemical sensors Detection in liquids Biosensors Eye Nose Tongue Immune s. Converting molecular presence into an electronic signal

2. A.Star et al Nano Letters 4,1587 (2004) Light: detection photons and converting the signal into electrons

3. Porphyrin and Photosynthesis ADP ATP NADP + NADPH h h e-e-

4. Fabricating porphyrine- CNT assemblies

5. hvhv hvhv e–e– D S VGVG Gate V SD Photon-electron conversion Direct conversion of light into an electronic signal R. Ramirez et al Nano lett (2006) A.Star et al Nano Letters (2004

6. Fabrication of a CNT – CdSe hybrid

9. Light sensors Chemical sensors Detection in liquids Biosensors Converting molecular presence into an electronic signal

10. Smell and taste:Mimiciking Nature’s Sensing Scheme Nature’s technology protective membrane external environment cell interior receptor protein C biological transcription using multiple proteins

11. Sensitivity 10% CH 4 1% H 2 10% CO Sensing based on the catalytic reaction H 2 2H +1/2O 2 H 2 O Pd Selectivity Pd coated NT sensor for hydrogen sensing

12. The Vision The vision Crossbar architecture for multiplexing wavelength Dynamic range Printed structures on biocompatible surgaces