Molecular Film–Assembled Detection System for Biosensors by Layer-by-Layer Adsorption

2018 ◽  
pp. 101-110
Author(s):  
Shin-ichiro Suye ◽  
Haitao Zheng ◽  
Hiroaki Sakamoto
Keyword(s):  
Detection System ◽  
Layer By Layer ◽  
Molecular Film ◽  
Layer Adsorption

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.

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

Coating of Polyaniline Molecules on Cotton Fabric via Successive Ionic Layer Adsorption and Reaction (SILAR) Technique

2018 ◽  
Vol 775 ◽  
pp. 317-322
Author(s):  
John Raphael D. Barrios ◽  
Marvin U. Herrera
Keyword(s):  
Infrared Spectrum ◽  
Cotton Fabric ◽  
Surface Conductivity ◽  
Optimum Number ◽  
Layer By Layer ◽  
Layer Deposition ◽  
Layer Adsorption ◽  
Silar Technique ◽  
Probe Measurements ◽  
Ionic Layer

Cotton fabric was coated with polyaniline molecules using Successive Ionic Layer Adsorption and Reaction (SILAR) technique. This method provides layer by layer deposition of polyaniline molecules. Infrared spectrum showed the vibrational peaks attributed with the presence of polyaniline molecules on the samples. Four-point probe measurements were done to obtain the surface conductivity of the samples. Upon increasing the dipping cycles, the conductivity of cotton fabric significantly increases. The optimum number of dipping cycle is found to be at 130. Beyond the optimum dipping cycle, the conductivity starts to decrease.

Assembly of Alternating Polycation and DNA Multilayer Films by Electrostatic Layer-by-Layer Adsorption

2001 ◽  
Vol 2 (2) ◽  
pp. 463-468 ◽  
Author(s):  
Renjun Pei ◽  
Xiaoqiang Cui ◽  
Xiurong Yang ◽  
Erkang Wang
Keyword(s):  
Multilayer Films ◽  
Layer By Layer ◽  
Layer Adsorption
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