PMID- 21926029
OWN - NLM
STAT- MEDLINE
DCOM- 20120216
LR  - 20131121
IS  - 1558-2639 (Electronic)
IS  - 1536-1241 (Linking)
VI  - 10
IP  - 3
DP  - 2011 Sep
TI  - Isolated photosystem I reaction centers on a functionalized gated high electron 
      mobility transistor.
PG  - 201-8
LID - 10.1109/TNB.2011.2164809 [doi]
AB  - In oxygenic plants, photons are captured with high quantum efficiency by two 
      specialized reaction centers (RC) called Photosystem I (PS I) and Photosystem II 
      (PS II). The captured photon triggers rapid charge separation and the photon 
      energy is converted into an electrostatic potential across the nanometer-scale 
      (~6 nm) reaction centers. The exogenous photovoltages from a single PS I RC have 
      been previously measured using the technique of Kelvin force probe microscopy 
      (KFM). However, biomolecular photovoltaic applications require two-terminal 
      devices. This paper presents for the first time, a micro-device for detection and 
      characterization of isolated PS I RCs. The device is based on an AlGaN/GaN high 
      electron mobility transistor (HEMT) structure. AlGaN/GaN HEMTs show high current 
      throughputs and greater sensitivity to surface charges compared to other 
      field-effect devices. PS I complexes immobilized on the floating gate of 
      AlGaN/GaN HEMTs resulted in significant changes in the device characteristics 
      under illumination. An analytical model has been developed to estimate the RCs of 
      a major orientation on the functionalized gate surface of the HEMTs.
CI  - (c) 2011 IEEE
FAU - Eliza, Sazia A
AU  - Eliza SA
AD  - Department of Electrical Engineering and Computer Science, University of 
      Tennessee, Knoxville, TN 37996, USA. saziaeliza@gmail.com
FAU - Lee, Ida
AU  - Lee I
FAU - Tulip, Fahmida S
AU  - Tulip FS
FAU - Mostafa, Salwa
AU  - Mostafa S
FAU - Greenbaum, Elias
AU  - Greenbaum E
FAU - Ericson, M Nance
AU  - Ericson MN
FAU - Islam, Syed K
AU  - Islam SK
LA  - eng
PT  - Journal Article
PT  - Research Support, U.S. Gov't, Non-P.H.S.
DEP - 20110915
PL  - United States
TA  - IEEE Trans Nanobioscience
JT  - IEEE transactions on nanobioscience
JID - 101152869
RN  - 0 (Photosystem I Protein Complex)
RN  - 60-24-2 (Mercaptoethanol)
RN  - 7440-57-5 (Gold)
RN  - CH46OC8YV4 (Gallium)
RN  - CPD4NFA903 (Aluminum)
RN  - N762921K75 (Nitrogen)
SB  - IM
MH  - Aluminum/chemistry
MH  - *Biosensing Techniques
MH  - Electrons
MH  - Gallium/chemistry
MH  - Gold/chemistry
MH  - Mercaptoethanol/chemistry
MH  - Microscopy, Atomic Force
MH  - Nitrogen/chemistry
MH  - Photons
MH  - Photosystem I Protein Complex/*chemistry
MH  - Spectrophotometry, Ultraviolet
MH  - *Transistors, Electronic
EDAT- 2011/09/20 06:00
MHDA- 2012/02/18 06:00
CRDT- 2011/09/20 06:00
PHST- 2011/09/20 06:00 [entrez]
PHST- 2011/09/20 06:00 [pubmed]
PHST- 2012/02/18 06:00 [medline]
AID - 10.1109/TNB.2011.2164809 [doi]
PST - ppublish
SO  - IEEE Trans Nanobioscience. 2011 Sep;10(3):201-8. doi: 10.1109/TNB.2011.2164809. 
      Epub 2011 Sep 15.