PMID- 17098415
OWN - NLM
STAT- MEDLINE
DCOM- 20070726
LR  - 20161124
IS  - 0956-5663 (Print)
IS  - 0956-5663 (Linking)
VI  - 22
IP  - 12
DP  - 2007 Jun 15
TI  - Potassium selective chemically modified field effect transistors based on 
      AlGaN/GaN two-dimensional electron gas heterostructures.
PG  - 2796-801
AB  - We investigate the use of the AlGaN/GaN high electron mobility transistor (HEMT) 
      as a novel transducer for the development of ion-selective chemically modified 
      HEMT sensors (ChemHEMTs). For this, polyvinyl chloride (PVC) membrane doped with 
      ion-selective ionophores is deposited onto the area of the gate for the chemical 
      recognition step, while the AlGaN/GaN HEMT is used as the transducer. In 
      particular, the use of a valinocycin doped membrane with thickness of 50 microm 
      generates a sensor with excellent analytical characteristics for the monitoring 
      of K(+). The K(+)-ChemHEMT has sensitivity of 52.4 mV/pK(+)in the linear range of 
      10(-5) to 10(-2)M, while the detection limit is in the order of 3.1 x 10(-6)M. 
      Also, the sensor shows selectivity similar to valinomycin-based ISEs, while the 
      signal stability over time and the measurement to measurement reproducibility are 
      very good.
FAU - Alifragis, Y
AU  - Alifragis Y
AD  - Laboratory of Analytical Chemistry, Department of Chemistry, University of Crete, 
      Voutes, PO Box 2208, 71003 Iraklion-Crete, Greece.
FAU - Volosirakis, A
AU  - Volosirakis A
FAU - Chaniotakis, N A
AU  - Chaniotakis NA
FAU - Konstantinidis, G
AU  - Konstantinidis G
FAU - Adikimenakis, A
AU  - Adikimenakis A
FAU - Georgakilas, A
AU  - Georgakilas A
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20061113
PL  - England
TA  - Biosens Bioelectron
JT  - Biosensors & bioelectronics
JID - 9001289
RN  - 0 (Aluminum Compounds)
RN  - 0 (aluminum gallium nitride)
RN  - 1R9CC3P9VL (gallium nitride)
RN  - CH46OC8YV4 (Gallium)
RN  - RWP5GA015D (Potassium)
SB  - IM
MH  - Aluminum Compounds/*chemistry
MH  - Biosensing Techniques/*instrumentation/methods
MH  - Electrons
MH  - Gallium/*chemistry
MH  - Potassium/*analysis
MH  - Potentiometry
MH  - *Transistors, Electronic
EDAT- 2006/11/14 09:00
MHDA- 2007/07/27 09:00
CRDT- 2006/11/14 09:00
PHST- 2006/06/30 00:00 [received]
PHST- 2006/09/26 00:00 [revised]
PHST- 2006/10/03 00:00 [accepted]
PHST- 2006/11/14 09:00 [pubmed]
PHST- 2007/07/27 09:00 [medline]
PHST- 2006/11/14 09:00 [entrez]
AID - S0956-5663(06)00487-8 [pii]
AID - 10.1016/j.bios.2006.10.010 [doi]
PST - ppublish
SO  - Biosens Bioelectron. 2007 Jun 15;22(12):2796-801. doi: 
      10.1016/j.bios.2006.10.010. Epub 2006 Nov 13.