P2.5.2 Electrical Monitoring of Layer-by-Layer Adsorption of Oppositely Charged Macromolecules by Means of Capacitive Field-Effect Devices

2012 ◽  
Author(s):  
M. Weil ◽  
A. Poghossian ◽  
M. J. Schöning ◽  
A. G. Cherstvy
Keyword(s):  
Field Effect ◽  
Layer By Layer ◽  
Layer Adsorption ◽  
Field Effect Devices ◽  
Charged Macromolecules ◽  
Oppositely Charged

Field-effect sensors for monitoring the layer-by-layer adsorption of charged macromolecules

2006 ◽  
Vol 118 (1-2) ◽  
pp. 163-170 ◽  
Author(s):  
A. Poghossian ◽  
M.H. Abouzar ◽  
M. Sakkari ◽  
T. Kassab ◽  
Y. Han ◽  
...  
Keyword(s):  
Field Effect ◽  
Layer By Layer ◽  
Layer Adsorption ◽  
Charged Macromolecules

Towards Label-free Detection of Charged Macromolecules Using Field-effect-based Structures: Scaling Down from Capacitive EIS Sensor over ISFET to Nano-scale Devices

2006 ◽  
Vol 915 ◽  
Author(s):  
Michael J. Schoening ◽  
Maryam H. Abouzar ◽  
Sven Ingebrandt ◽  
Johannes Platen ◽  
Andreas Offenhaeusser ◽  
...  
Keyword(s):  
Field Effect ◽  
Deep Understanding ◽  
Layer By Layer ◽  
Label Free ◽  
New Approach ◽  
Charged Surfaces ◽  
Physiological Processes ◽  
Layer Adsorption ◽  
Label Free Detection ◽  
Charged Macromolecules

AbstractThe possibility of a label-free electrical detection of charged macromolecules using semiconductor field-effect sensors offers a new approach for the development of DNA chips with fast and direct electrical readout. A deep understanding of the adsorption and interaction of charged biomolecules onto charged surfaces is of great interest also for the fundamental understanding of many key physiological processes. In the present work, two types of field-effect sensors, namely a capacitive EIS (electrolyte-insulator-semiconductor) structure and an ISFET (ion-sensitive field-effect transistor) have been utilised for monitoring layer-by-layer adsorption of polyelectrolytes as well as for the DNA immobilisation and hybridisation detection.

scholarly journals Capacitive Field-effect (bio-)chemical Sensors Based on Nanocrystalline Diamond Films

2009 ◽  
Vol 1203 ◽  
Author(s):  
Matthias Bäcker ◽  
Arshak Poghossian ◽  
Maryam H. Abouzar ◽  
Sylvia Wenmackers ◽  
Stoffel D. Janssens ◽  
...  
Keyword(s):  
Thin Films ◽  
Field Effect ◽  
High Sensitivity ◽  
Ph Sensitive ◽  
Nanocrystalline Diamond ◽  
Penicillin G ◽  
Layer By Layer ◽  
Label Free ◽  
High Coverage ◽  
Layer Adsorption

AbstractCapacitive field-effect electrolyte-diamond-insulator-semiconductor (EDIS) structures with O-terminated nanocrystalline diamond (NCD) as sensitive gate material have been realized and investigated for the detection of pH, penicillin concentration, and layer-by-layer adsorption of polyelectrolytes. The surface oxidizing procedure of NCD thin films as well as the seeding and NCD growth process on a Si-SiO2 substrate have been improved to provide high pH-sensitive, non-porous thin films without damage of the underlying SiO2 layer and with a high coverage of O-terminated sites. The NCD surface topography, roughness, and coverage of the surface groups have been characterized by SEM, AFM and XPS methods. The EDIS sensors with O-terminated NCD film treated in oxidizing boiling mixture for 45 min show a pH sensitivity of about 50 mV/pH. The pH-sensitive properties of the NCD have been used to develop an EDIS-based penicillin biosensor with high sensitivity (65-70 mV/decade in the concentration range of 0.25-2.5 mM penicillin G) and low detection limit (5 μM). The results of label-free electrical detection of layer-by-layer adsorption of charged polyelectrolytes are presented, too.

A Facile Layer-by-Layer Adsorption and Reaction Method to the Preparation of Titanium Phosphate Ultrathin Films

2005 ◽  
Vol 17 (13) ◽  
pp. 3563-3569 ◽  
Author(s):  
Qifeng Wang ◽  
Ling Zhong ◽  
Junqi Sun ◽  
Jiacong Shen
Keyword(s):  
Ultrathin Films ◽  
Titanium Phosphate ◽  
Layer By Layer ◽  
Reaction Method ◽  
Layer Adsorption

Amperometric glucose biosensor by means of electrostatic layer-by-layer adsorption onto polyaniline-coated polyester films

2010 ◽  
Vol 16 (3) ◽  
pp. 380-384 ◽  
Author(s):  
Young Jae Shin ◽  
Sun Hee Kim ◽  
Do Hyeon Yang ◽  
Hyoshik Kwon ◽  
Jae Sup Shin
Keyword(s):  
Glucose Biosensor ◽  
Layer By Layer ◽  
Layer Adsorption

scholarly journals Label-free Electrostatic Detection of DNA Amplification by PCR Using Capacitive Field-effect Devices

2016 ◽  
Vol 168 ◽  
pp. 514-517 ◽  
Author(s):  
A. Poghossian ◽  
T.S. Bronder ◽  
S. Scheja ◽  
C. Wu ◽  
T. Weinand ◽  
...  
Keyword(s):  
Field Effect ◽  
Dna Amplification ◽  
Label Free ◽  
Field Effect Devices

Mos digital‐to‐analog converter employing scaled field effect devices

1981 ◽  
Vol 69 (3) ◽  
pp. 889-889
Author(s):  
Ajay K. Puri ◽  
Michael J. Caruso ◽  
Stanley M. Dennison ◽  
Jay Brown
Keyword(s):  
Field Effect ◽  
Digital To Analog Converter ◽  
Analog Converter ◽  
Field Effect Devices ◽  
Digital To Analog
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