SENSORS BASED ON FIELD EFFECT TRANSISTORS FUNCTIONALIZED BY CHEMICAL MODIFIER/NANOPARTICLE HYBRID SYSTEMS

amountdollElectronics - Devices

Nov 2, 2013 (3 years and 8 months ago)

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P
.O.B 4034 Ness
-
Ziona
70400
, Israel

Te
l:
+972
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8
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9
31
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3070
,
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Organized and Produced

by
:



www.
isranalytica.org.il



Site: www.BioForum.org.il


E
-
mail: BioForum@bezeqint.net


SENSORS BASED ON FIE
LD EFFECT TRANSISTOR
S
FUNCTIONALIZED BY CH
EMICAL MODIFIER/NANO
PARTICLE
HYBRID SYSTEMS

Jenny Gun
1
, Michael J. Schöning
2
, Maryam H. Abouzar
2

& Arshak Poghossian
2

1
Casali Institute of Applied Chemistry, Department of Chemistry, The Hebrew
University of
Jerusalem, Jerusalem, Israel

2
Aachen University of Applied Sciences (Julich Campus), Jülich, Germany

E
-
mail:
jennyg@savion.huji.ac.il


The application of silicon
-
based microelectronic devices,
and particularly ion
-
sensitive field
-
effect
transistors (ISFETs) as transduction elements for recognition events, is a challenging research field
in bioelectronics and analytical chemistry. Field effect devices (FEDs) offer the advantage to detect
charges
by their intrinsic behavior. We are trying to construct hybrid nanomaterials that
incorporate the highly selective recognition properties of chemical sensing molecules with the
unique electronic, photonic, and catalytic features of nanoparticles.. Metal
nanoparticles (1

200
nm) provide exciting building blocks for nanoscale assemblies, structures, and devices.

The sensing interface of a field effect transistor is modified by a monolayer of metal nanoparticles,
using chemical linkers for the covalent or
electrostatic coupling of the Au nanoparticles to the gate
surface. The immobilized Au nanoparticles are then functionalized in a different ways by sensing
units. The approach is demonstrated by studying the sensor performance towards heavy metal
ions.










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Modified Sensing Interface

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