scholarly journals Microfluidic Lab-on-a-Chip characterization of nano- to microparticles suspensions by light extinction spectrometry

2021 ◽  
Author(s):  
Fabrice Onofri ◽  
Isaac RODRIGUEZ-RUIZ ◽  
Fabrice Lamadie
Keyword(s):  
Lab On A Chip ◽  
Light Extinction

(Invited) Electrochemical Characterization of Nanogap Interdigitated Electrode Arrays for Lab-on-a-Chip Applications

2017 ◽  
Vol 80 (10) ◽  
pp. 1295-1308 ◽  
Author(s):  
Volha Matylitskaya ◽  
S Kasemann ◽  
G Urban ◽  
C Dincer ◽  
Stefan Partel
Keyword(s):  
Lab On A Chip ◽  
Electrochemical Characterization ◽  
Electrode Arrays ◽  
Interdigitated Electrode

Characterization of a Piezoresistive Microcantilever as a Sensor for Detecting the Bio-Molecules

2006 ◽  
Vol 510-511 ◽  
pp. 1090-1093
Author(s):  
Kyung-Ah Yoo ◽  
Kwang Ho Na ◽  
Seung-Ryong Joung ◽  
D. Jeon ◽  
Y.J. Choi ◽  
...  
Keyword(s):  
Surface Stress ◽  
Cost Efficiency ◽  
Detection Method ◽  
Lab On A Chip ◽  
Cell System ◽  
Fused Silica ◽  
The Difference ◽  
Fused Silica Glass ◽  
Fluid Cell

We propose an electrical detection method for detecting the various bio-molecules effectively with microcantilevers. The piezoresistive microcantilevers were fabricated employing surface micromachining technique that has attractive advantages in terms of cost efficiency, simplicity, and ability of fabricating in array. The fluid cell system for injection of bio-molecular solution is fabricated using polydimethylsiloxane (PDMS) and a fused silica glass. The microcantilever is deflected with respect to the difference of the surface stress caused by the formation of self-assembled bio-molecules on the gold coated side of the microcantilever. We confirmed that the deflections occurred by the bio-molecule adsorption and microcantilever can be widely used to a &-TAS and a lab-on-a-chip as a sensor for the potential detection of various biomolecules.

scholarly journals Design, fabrication and characterization of drug delivery systems based on lab-on-a-chip technology

2013 ◽  
Vol 65 (11-12) ◽  
pp. 1403-1419 ◽  
Author(s):  
Nam-Trung Nguyen ◽  
Seyed Ali Mousavi Shaegh ◽  
Navid Kashaninejad ◽  
Dinh-Tuan Phan
Keyword(s):  
Drug Delivery ◽  
Drug Delivery Systems ◽  
Lab On A Chip ◽  
Delivery Systems ◽  
Chip Technology ◽  
Fabrication And Characterization

A Lab-on-a-Chip Device Using a Dielectrophoresis-Aligned Carbon Nanotube Sensor Array

2011 ◽  
Author(s):  
Pengfei Li ◽  
Nan Lei ◽  
Jie Xu ◽  
Wei Xue
Keyword(s):  
Carbon Nanotube ◽  
Sensor Array ◽  
Uv Light ◽  
Lab On A Chip ◽  
High Sensitivity ◽  
Metal Electrodes ◽  
Flow Sensors ◽  
Single Walled Carbon Nanotube ◽  
Ph Values

Here we report the design, fabrication, and characterization of a lab-on-a-chip device using a nanotube-based sensor array. The microfluidic components are composed of an ultraviolet (UV) light-defined, cross-linked SU-8 microchannel and a polydimethylsiloxane (PDMS) top cover. The hybrid microfluidic structure provides a fully sealed microchannel, well-aligned features, and precisely positioned nanosensors. Well-organized single-walled carbon nanotube (SWNT) thin films are deposited and aligned across the electrodes on a silicon substrate with dielectrophoresis. The assembly of SWNTs is carried out in a sealed microchannel. The SWNT devices are configured as two-terminal resistor-type sensors with the metal electrodes as the probing pads and the dielectrophoretically captured SWNTs as the sensing elements. The SWNT devices are used as integrated flow sensors to monitor the flow rate in the microchannel. In addition, when exposed to aqueous solutions with various pH values, these sensors change their resistance accordingly and demonstrate high sensitivity towards pH solutions.

scholarly journals Radiative behavior and canopy light extinction coefficient in a savanna urban area

2020 ◽  
Vol 42 ◽  
pp. e18
Author(s):  
Levi Pires de Andrade ◽  
Jonathan Willian Zangeski Novais ◽  
Marta Cristina de Jesus Albuquerque Nogueira ◽  
Luciana Sanches ◽  
José De Souza Nogueira ◽  
...  
Keyword(s):  
Urban Area ◽  
Extinction Coefficient ◽  
Incident Radiation ◽  
Light Extinction ◽  
Area Index ◽  
Transmitted Radiation ◽  
Light Extinction Coefficient ◽  
Radiation Incidence ◽  
Radiative Characteristics

The knowledge of the radiative characteristics of an area is essential to understanding the flows of matter and energy. The value of the Light Extinction Coefficient (K) is a parameter that describes the efficiency of the interception of light in a given canopy, being required, as input, for several SWAP (Soil-Water-Atmosphere-Plant) models, which allow the characterization of the interactive properties among  soil, plant and atmosphere concerning these exchanges of matter and energy. This study aimed to obtain the light extinction coefficient (K) for a savanna fragment located in the urban area of Cuiabá. The used data correspond to one measurement each month, totaling twelve measurements in 30 points during the period from October 2014 to September 2015. The measured variables  were the LAI (Leaf Area Index), the photosynthetically active incident radiation (PARinc) and the transmitted radiation  (PARtrans), and the calculated ones were the zenith angle (Zh) and the extinction coefficient (K). Was observed an annual variability for the light extinction coefficient between 0.49 and 0.69. There are seasonal changes that interfere with the canopy geometry and the position of the study area in relation to the solar radiation incidence, concluding that the K variability is predominantly temporal.

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