A5101723039- Gas Sensing Nanomaterials and Sensors
- Analytical Chemistry and Sensors
- Advanced biosensing and bioanalysis techniques
- Graphene research and applications
- Advanced Chemical Sensor Technologies
- Plasmonic and Surface Plasmon Research
- Mechanical and Optical Resonators
- Force Microscopy Techniques and Applications
- Terahertz technology and applications
- Nanowire Synthesis and Applications
- Retinal Development and Disorders
- Indoor and Outdoor Localization Technologies
- Wood Treatment and Properties
- Advanced Statistical Methods and Models
- Advanced MEMS and NEMS Technologies
- Advanced Fluorescence Microscopy Techniques
- Statistical Methods and Inference
- Video Surveillance and Tracking Methods
- Molecular Junctions and Nanostructures
- Photonic Crystal and Fiber Optics
- Gold and Silver Nanoparticles Synthesis and Applications
- Superconducting and THz Device Technology
- Energy Efficient Wireless Sensor Networks
- Mobile Ad Hoc Networks
- Anodic Oxide Films and Nanostructures
Korea Institute of Science and Technology
2013-2022
Korean Association Of Science and Technology Studies
2018
Korea Forest Service
2012-2017
Minot State University
2017
Seoul National University
2015-2016
Soongsil University
2009-2016
University of Wisconsin–Madison
2010-2011
Jeonbuk National University
2003-2007
Clemson University
2002
Ewha Womans University
1999
Abstract Molecular recognition and discrimination of carbohydrates are important because perform essential roles in most living organisms for energy metabolism cell-to-cell communication. Nevertheless, it is difficult to identify or distinguish various carbohydrate molecules owing the lack a significant distinction physical chemical characteristics. Although there has been considerable effort develop sensing platform individual selectively using receptors an ensemble array, their detection...
Detection of gas-phase chemicals finds a wide variety applications, including food and beverages, fragrances, environmental monitoring, chemical biochemical processing, medical diagnostics, transportation. One approach for these tasks is to use arrays highly sensitive selective sensors as an electronic nose. Here, we present high performance chemiresistive nose (CEN) based on array metal oxide thin films, metal-catalyzed nanostructured films. The gas sensing properties the CEN show enhanced...
We report that single-stranded deoxyribonucleic acids (ssDNAs) at very low concentrations can be detected using graphene-combined nano-slot-based terahertz (THz) resonance. A combination of the resonant structure and tuned electro-optical properties graphene provide unprecedentedly sensitive biomolecule sensing even energy THz photons, overcoming huge scale difference 10,000:1 between wavelength size ssDNAs. Ultrahigh sensitivity is obtained by significant increase in absorption...
Nanofibres of TiO2–SiO2 (Ti:Si = 50: 50 mol%) with diameters 50–400 nm were prepared by calcining electrospun nanofibres polyvinyl acetate (PVac)/titania–silica composite as precursor. These PVac/titania–silica hybrid obtained from a homogenous solution PVac sol–gel titanium isopropoxide (TiP) and tetraethoxysilane using the electrospinning technique. The characterized scanning electron microscopy (SEM), wide-angle x-ray diffraction (WAXD), Fourier transform infrared (FTIR) spectroscopy...
A motion recognition-based 3D pedestrian navigation system that employs a smartphone is presented. In existing inertial measurement unit (IMU)-based dead-reckoning (PDR) systems, sensor axes are fixed regardless of user motion, because the IMU mounted on shoes or helmet. On other hand, changed according to walking user, usually carried by hand kept in pocket. Therefore, conventional PDR method cannot apply smartphone-based system. To overcome this limitation, status detected using...
Highly sensitive and selective chemiresistive sensors based on graphene functionalized by metals metal oxides have attracted considerable attention in the fields of environmental monitoring medical assessment because their ultrasensitive gas detecting performance cost‐effective fabrication. However, operation, terms detection limit reliability, is limited traditional applications ambient humidity. Here, enhanced sensitivity selectivity single‐stranded DNA‐functionalized (ssDNA‐FG) to NH 3 H...
We present a novel type of highly sensitive and selective detection method for residual pesticide molecules including, e.g., methomyl using nanoscale metamaterials based terahertz (THz) time-domain spectroscopy (TDS) system. Nanoscale slot-antenna-based were designed the strong THz resonance at certain frequency, where specific molecule has intramolecular or intermolecular collective vibrational mode. Enhanced near-field via nano-antenna metamaterial strongly increases absorption cross...
Abstract Toward the development of surface-sensitive analytical techniques for biosensors and diagnostic biochip assays, a local integration low-concentration target materials into sensing region interest is essential to improve sensitivity reliability devices. As result, dynamic process sorting accurate positioning nanoparticulate biomolecules within pre-defined micro/nanostructures critical, however, it remains huge hurdle realization practical biochips. A scalable, massive,...
This paper presents a new pattern recognition approach for enhancing the selectivity of gas sensor arrays clustering intelligent odor detection. The aim this was to accurately classify an using in order enhance arrays. achieved monitoring system with newly developed neural-genetic classification algorithm (NGCA). shows enhancement sensitivity detected gas. Experiments showed that proposed NGCA delivered better performance than previous genetic (GA) and artificial neural networks (ANN)...
The decoration of p ‐type nickel oxide (NiO) with n hematite (α‐Fe 2 O 3 ) to achieve vertically ordered 1D nanostructures is an attractive strategy enhance gas sensing properties. Herein, the authors report a facile method for α‐Fe whole surface vertical NiO nanorods. An NiO/Fe heterostructure deposited in multiple steps using glancing angle deposition method, which followed by oxidation Fe into . Thermally agglomerated nanoparticles are uniformly distributed on Due decoration, nanorods...
Recently, evidence was presented that certain single-walled carbon nanotubes (SWNTs) possess helical defective traces, exhibiting distinct cleaved lines, yet their mechanical characterization remains a challenge. On the basis of spiral growth model SWNTs, here we present atomic details defects and investigate how tensile behaviors SWNTs change with presence using molecular dynamics simulations. have exhibited substantially lower strength strain than theoretical results obtained from seamless...
Hollow-structured nanomaterials are presented as an outstanding sensing platform because of their unique combination high porosity in both the micro- and nanoscale, biocompatibility, flexible template applicability. Herein, we introduce a bacterial skeleton method allowing for cost-effective fabrication with nanoscale precision. As proof-of-concept, fabricated hollow SnO2 hemipill network (HSHN) Pt-functionalized (HPN). A superior detecting capability HPN toward acetone, diabetes biomarker,...
Polyhedral oligosilsesquioxane (POSS)-containing amphiphilic poly(vinyl alcohol) (PVA) hybrids (PVA−POSS hybrids) were synthesized by urethane linkage between the hydroxyl groups of PVA and monoisocyanate group POSS macromers. The hydrophobicity PVA−POSS was varied changing incorporated amounts hydrophobic macromers, resulting in control over water resistance. characterized 1H NMR, FT-IR, DSC, TGA revealed modified thermal stability solubility depending on That is, modification both solid...
Europium decorated graphene provides photoluminescence feature changes with an enhancement of blue emission located at 458 nm after thermal reduction.
Despite technological advances in biomolecule detections, evaluation of molecular interactions via potentiometric devices under ion-enriched solutions has remained a long-standing problem. To avoid severe performance degradation bioelectronics by ionic screening effects, we cover probe surfaces field effect transistors with single film the supported lipid bilayer, and realize respectable signals from receptor-ligand bindings irrespective strength bulky placing an ion-free water layer...
We report the enhancement of hole injection and electroluminescence (EL) in an organic light emitting diode (OLED) with ordered Ag nanodot array on indium-tin-oxide (ITO) anode. Until now, most researches have focused improved performance OLEDs by plasmonic effects metal nanoparticles due to difficulty fabricating arrays. A well-ordered is fabricated ITO anode OLED using nanoporous alumina as evaporation mask. The device arrays shows higher current density EL than one without any...
Abstract The adverse effects of air pollution on respiratory health make quality monitoring with high spatial and temporal resolutions essential especially in cities. Despite considerable interest efforts, the application various types sensors is considered immature owing to insufficient sensitivity cross‐interference under ambient conditions. Here, a fully integrated chemiresistive sensor array (CSA) parts‐per‐trillion demonstrated its for on‐road NO x monitoring. An analytical model...
We constructed lanthanide ion doped double-crossover DNA lattices grown on a silica substrate and studied their photoluminescence characteristics.
A liquid-permeable concept in a metal–insulator–metal (MIM) structure is proposed to achieve highly sensitive color-tuning property through the change of effective refractive index dielectric insulator layer. semicontinuous top metal film with nanoapertures, adopted as transreflective layer for MIM resonator, allows tailor nanomorphology selective etching underneath layer, resulting nanopillars and hollow voids By allowing outer mediums enter into such architecture enables wavelength shift...
We demonstrate single electron shuttling through two coupled nanomechanical pendula. The pendula are realized as nanopillars etched out of the semiconductor substrate. Coulomb blockade is found at room temperature, allowing metrological applications. By controlling mechanical frequency we able to validate different regimes shuttling.