A5048328291- Gas Sensing Nanomaterials and Sensors
- Analytical Chemistry and Sensors
- Advanced Chemical Sensor Technologies
- Educational Systems and Policies
- Advanced Sensor and Energy Harvesting Materials
- Dielectric materials and actuators
- Molecular Junctions and Nanostructures
- Asian Culture and Media Studies
- Blind Source Separation Techniques
- Speech and Audio Processing
- Ferroelectric and Piezoelectric Materials
- Fuel Cells and Related Materials
- ZnO doping and properties
- Force Microscopy Techniques and Applications
- Sensor Technology and Measurement Systems
- Conducting polymers and applications
- Image and Signal Denoising Methods
- Neural Networks and Applications
- Electrowetting and Microfluidic Technologies
- Diverse Approaches in Healthcare and Education Studies
- Semiconductor materials and interfaces
- Graphene research and applications
- Media Studies and Communication
- Surface Modification and Superhydrophobicity
- Advanced Cellulose Research Studies
Electronics and Telecommunications Research Institute
2008-2017
Daejeon University
2014
Seoul National University
2005-2008
Kyungpook National University
2001-2005
Abstract Electric components based on fibers or textiles have been investigated owing to their potential applications in wearable devices. High performance response gas, drape-ability and washing durability are of important for gas sensors fiber substrates. In this report, we demonstrate the bendable washable electronic textile ( e -textile) composed reduced graphene oxides (RGOs) using commercially available yarn molecular glue through an electrostatic self-assembly. The -textile sensor...
Since metal oxide semiconductors were investigated as chemiresistors, rapid advances have been reported in this field. However, better performance metrics are still required, such higher sensitivity and selectivity levels for practical applications. To improve the sensing performance, we discuss an optimal composition of active material, nonstoichiometric Co-rich ZnCo2O4, prepared by partial substitution Co2+ into Zn2+ Co3O4 without altering a hollow sphere morphology. Remarkably, ZnCo2O4...
Ultra-sensitive RGO gas sensors with a facile preparation method are presented. The sensor composed of nanofibers showed excellent sensitivity to NO<sub>2</sub>gas.
The detection of formaldehyde at a very low concentration is significant research topic, due to its detrimental impact on human health. In the present study, we fabricated hierarchical structure by rational assembly single-crystalline Co3O4 nanoparticles. A hollow morphology using sacrificial ZnO spheres could form three-dimensional conducting network in solid state. resulting was selectively active for sensing, and limit 50 ppb, which nearly close record-high value among other...
We present a statistical method to investigate the electronic transport of molecular devices. Electrical characterizations are performed with subsequent analysis on 6745 devices nanometer-scale junction diameter. The comprehensive temperature-variable current-voltage measurements also elucidate dominant charge conduction mechanism responsible for intrinsic properties. entity data acquired represents reliable basis analysis, which consequently provides an objective criterion determine most...
Plasma etching was performed to improve displacement and response speed of IPMC actuator through homogeneous roughening anisotropic surface treatment. We found that the treatment by plasma Nafion in pre-treatment process gave resulting which 2 times faster 1.5 larger than those manufactured sandblasting, respectively.
Simple and highly efficient microvalve systems based on an ionic polymer-metal composite (IPMC) diaphragm actuator have been developed. The system that was fabricated in this work operates when open close voltage is applied, due to the phenomena of lithium ion flux subsequent electro-osmotic drag water cathode. IPMC prepared by compositing with platinum nanoparticles both sides Nafion thin film. SEM images showed high density uniform size distribution Pt interpenetrating layer ensure proper...
This research reports efficient reducing method of graphene oxide for gas sensor application. Graphene has been known to response such as nitrogen (NO2) or ammonia (NH3) and change resistivity corresponding the concentration. Here we carried out reduction by hydriodic acid (HI) [1], NH2NH2 [2] thermal annealing [3] under H2 atmosphere compared sensing behavior each reduced oxide. We found that HI responded strongly (sensitivity 5%) 2%) 0.15%).
Thick film semiconductor gas sensors based on indium oxide were fabricated Si substrate. The sensing materials substrate characterized using optical microscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM), so on. They very fine uniform we found out that particle sizes about 20~30 nm through XRD analysis. Gas responses of measured in a chamber where flow was controlled by mass controller (MFC). Their resistance changes monitored real time data acquisition board personal...
Recently, it has become increasingly important to control molecular layers, especially with regard the formation of bilayers, in order avoid electrical shorts electronics. In this paper, we report on characterization an situ thiol-terminated bilayer that is formed by hydrogen bonding between amine group aminoalkanethiol monolayer a gold surface and free aminoalkanethiolates bulk solution. We also use rose bengal (RB) for purpose application memory device. Using surface-sensitive techniques...
In this paper, micro gas sensor was fabricated using indium oxide nanowire for effective detection and monitoring system. Indium grown thermal CVD, their structural properties were examined by the SEM, XRD TEM. The electric microdropped device measured, response characteristics CO gas. Sensors showed high sensitivity stability And with below 20 mw power consumption, 5 ppm could be detected.