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Wearable piezoresistive strain sensor based on graphene ...

Oct 22, 2019· We present a highly elastic and wearable piezoresistive strain sensor based on threedimensional, microporous graphenecoated polydimethylsiloxane (PDMS) sponge suitable for being attached on human skin. The proposed strain sensors are simply fabricated by a sugar templating process and dip coating method based graphene ink in a facile and cost effective …


Fabrication of fluorescent oxygen gas sensor probe module ...

Fabrication of fluorescent oxygen gassensor probe module based on asymmetric 1 × 2 optical waveguides using UV imprint lithography SeungHun Oh, * KiDo Ahn, and HyunYoung Choi


On the gas permeation in PDMS

J. Micromech. Microeng. 20 (2010) 115033 LJ Yang Figure 1. The configuration of the pressure sensor packaged by PDMS. The silicon piezoresistive pressure sensor has a chip size of


New generation of αMnO2 nanowires PDMS composite as a ...

Up to12%cash back· Feb 16, 2018· New hydrogen gas sensor has been prepared by αMnO2 nanowires in polydimethylsiloxane matrix. For this purpose, the high aspect ratio αMnO2 nanowires has been prepared by the aid of hydrothermal method and then dispersed into polydimethyl siloxane polymer media. For gas sensing, the samples have been exposed under different gas concentrations from 0 to …


Gas Permeation in PDMS Monitored by Onsite Pressure …

the output performance of pressure sensors in a quite Abstract—This paper proposes a new methodology to detect the gasleakage and the corresponding diffusion coefficient of PDMS. The authors use PDMS instead of Pyrex 7740 glass to


New generation of αMnO2 nanowires PDMS composite as …

253 S. M. Hamidi et al. 1 3 Page 2 of 6 of deionized water. Then mol of (NH 4 2 SO 4 in 42 ml of deionized water was added to the initial solution.


Colorimetric Gas Sensing Washable Threads for Smart ...

Apr 04, 2019· A fabrication method for a stable entrapment of optically responsive dyes on a thread substrate is proposed to move towards a detection system that can be integrated into clothing. We use the dyes ...


analytical chemistry How to adjust selectivity of gas ...

Chemistry Stack Exchange is a question and answer site for scientists, academics, teachers, and students in the field of chemistry. It only takes a minute to sign up.


Modeling carbon dioxide transport in PDMSbased ...

Dec 01, 2015· First, CO 2 transport modeling is covered before presenting equations required for estimation of liquid pH in cell culturing devices. Carbon dioxide transport and concentration. In a PDMS cell culture device, CO 2 concentration can be in gas, liquid and solid phases ( Forry and Locascio, 2011, Polinkovsky et al., 2009 ).


Highly Sensitive Porous PDMSBased Capacitive Pressure ...

A novel porous polydimethylsiloxane (PDMS)based capacitive pressure sensor was fabricated by optimizing the dielectric layer porosity for widerange pressure sensing applications in the sports field. The pressure sensor consists of a porous PDMS dielectric layer and two fabricbased conductive elec …


Micropressure sensor made of conductive PDMS for ...

We report on results of fabrication and characterization of a conductive gel based pressure sensor which can be easily integrated into the commonly used …


Fabrication of fluorescent oxygen gassensor probe module ...

Sep 06, 2019·

We proposed and developed an integrated fluorescent oxygen gassensor probe module based on asymmetric 1 × 2 optical waveguides that can transmit power from an optical source and the fluorescence signal with high efficiency simultaneously. The fluorescent oxygen gassensor comprises an optical source part, optical detector part, and optical sensing …


Pneumatic gas regulator with cascaded PDMS seal valves ...

This paper presents for the first time the pneumatic gas regulator with cascaded polydimethylsiloxane (PDMS) seal valves toward the miniaturization of the gas detection system.


NQSDoped PDMS Solid Sensor: From Water Matrix to Urine ...

biosensors Article NQSDoped PDMS Solid Sensor: From Water Matrix to Urine Enzymatic Application Adrià MartínezAviñó, Lusine Hakobyan, Ana BallesterCaudet * , …


A facile PDMS coating approach to roomtemperature …

Dec 15, 2020· Fig. 1 shows the schematic illustration for the preparation of PDMSPd/TiO 2 NTs. Pd/TiO 2 NTs were firstly prepared according to previously reported method [25,27].To synthesize PDMSPd/TiO 2 NTs, the pristine Pd/TiO 2 NTs were placed in a sealed glass container with freshly prepared PDMS stamp. The glass container was kept at 235 °C for a certain of time and then allowed to cool to room ...


(PDF) Microstructured Ceramics by PDMS Molds for Gas ...

Mar 11, 2002· Microstructured Ceramics by PDMS Molds for Gas Sensor Arrays. March 2002


Pd films on soft substrates: a visual, highcontrast and ...

Jan 09, 2019· A simple, lowcost sensor, designed for remotely detecting dangerous hydrogen levels, is extremely desired in hydrogenrelated applications. Chongjun …


US Patent for Gas sensor array and method Patent (Patent ...

Jun 29, 2015· The invention relates to a method for analyzing the composition of a gaseous stream comprising at least two gaseous components, one of which is methane; and to a sensor array and a gas sensor comprising such sensor array. The method comprises contacting the gaseous mixture with a sensor, wherein the sensor comprises a sensor array comprising at …


A facile PDMS coating approach to roomtemperature …

The interference from relative humidity (RH) poses a critical issue for the practical application of roomtemperature gas sensors. We demonstrate herein coating gas sensors with a hydrophobic polydimethylsiloxane (PDMS) layer can significantly enhance their humidity resistance.


Novel PDMSBased Sensor System for MPWM Measurements of ...

In order for automatic microinjection to serve biomedical and genetic research, we have designed and manufactured a PDMSbased sensor with a circular section channel using the microwire molding technique. For the very precise control of microfluidic transport, we developed a microfluidic pulse width …


Heterogenous Integration of MEMS Gas Sensor using FOWLP ...

Jun 30, 2020· The exponentially increasing global population has led to environmental pollution which drastically affects human health; emphasizing the need for personal environmental monitoring. This demands the development of wearable devices capable of sensing the local environment and wirelessly transmitting data to cloud for spatial pollution this …


Stretchable gas sensors for detecting biomarkers from ...

Dec 01, 2020· The stretchable ZnO/PDMS gas sensor also exhibits larger sensitivity and faster response/recovery rates when compared to the rigid ZnO/silicon sensor. This superior sensing performance is attributed to the highly gas permeable nature of PDMS and the unique microtectonic morphology of the ZnO plates on PDMS, which both lead to an increased ...


Sensors | Free FullText | PtOEP–PDMSBased Optical Oxygen ...

The advanced and widespread use of microfluidic devices, which are usually fabricated in polydimethylsiloxane (PDMS), requires the integration of many sensors, always compatible with microfluidic fabrication processes. Moreover, current limitations of the existing optical and electrochemical oxygen sensors regarding longterm stability due to sensor degradation, …


PDMS Based Air Pollution Detection Sensor Using ...

Apr 24, 2018· PDMS Based Air Pollution Detection Sensor Using Microfluidics Technology written by Sudhanshu Singh, Yuvraj Vidyadhar, Lav Ishan published on 2018/04/24 download full article with reference data and citations


A selfpowered gas sensor based on PDMS/Ppy triboelectric ...

Jun 21, 2019· Conflict of interest The authors declare that they have no conflicts of interest.. Haoxuan He is currently studying for the doctoral degree in the College of Sciences, Northeastern University, China. Now his research interests focus on the selfpowered sensor, selfpowered electronic skin and selfcharging power unit system.


Characterization of longterm stability of PDMSbased ...

May 30, 2016· Longterm chemical stability of organometallic reagents incorporated into polydimethylsiloxane matrix of polymercladoptical fibres by soaking method is investigated by means of VIS/NIR absorption spectroscopy, protoninduced Xrayemission and electron paramagnetic resonance spectroscopy. Based on the obtained experimental results, a …


Holographic metasurface gas sensors for instantaneous ...

The arrangement of ultrathin metallic or dielectric nanostructures into arrays of artificial metaatoms, often called optical metasurfaces, has been used for ultracompact displays and photonic sensor platforms (12–14).Most early metasurface sensors are based on metallic nanostructures, or plasmonic metasurfaces (15–18), to exploit the strongly focused light to …


(PDF) Gas permeation in PDMS monitored by onsite …

This paper studies the permeability of PDMS membrane to CO 2 and He for the thickness smaller than 55 μm. The reasons of the choice of PDMS are in its wide use: from gas separation membrane field ...


Gas sensors using ordered macroporous oxide …

May 24, 2021· A photovoltaic selfpowered gas sensor based on MoS2/GaSe heterojunction is fabricated via mechanical exfoliation and alldry transfer method. Under visible light illumination, large numbers of free ...