A5089193564- Nanomaterials and Printing Technologies
- Quantum Dots Synthesis And Properties
- Nanofabrication and Lithography Techniques
- Electrowetting and Microfluidic Technologies
- TiO2 Photocatalysis and Solar Cells
- Photonic and Optical Devices
- Gamma-ray bursts and supernovae
- Advanced Sensor and Energy Harvesting Materials
- Optical Coatings and Gratings
- nanoparticles nucleation surface interactions
- ZnO doping and properties
- Advanced Surface Polishing Techniques
- Force Microscopy Techniques and Applications
- Conducting polymers and applications
- Semiconductor Quantum Structures and Devices
- Thermal properties of materials
- Copper-based nanomaterials and applications
- Semiconductor materials and devices
- Nonlinear Optical Materials Studies
- Analytical Chemistry and Sensors
- Gold and Silver Nanoparticles Synthesis and Applications
- Semiconductor materials and interfaces
- Astronomy and Astrophysical Research
- Nanowire Synthesis and Applications
- Laser Material Processing Techniques
Kyung Hee University
2015-2017
Ewha Womans University
2010-2012
Korea Advanced Institute of Science and Technology
2010-2011
Ewha Womans University Medical Center
2011
University of California, Berkeley
2010
Kyungil University
1998
A highly stretchable metal electrode is developed via the solution-processing of very long (>100 μm) metallic nanowires and subsequent percolation network formation low-temperature nanowelding. The from demonstrated high electrical conductivity (∼9 ohm sq−1) mechanical compliance (strain > 460%) at same time. This method expected to overcome performance limitation current electronics such as graphene, carbon nanotubes, buckled nanoribbons. Detailed facts importance specialist readers are...
In this paper, in order to increase the power conversion efficiency we demonstrated selective growth of "nanoforest" composed high density, long branched "treelike" multigeneration hierarchical ZnO nanowire photoanodes. The overall light-conversion DSSCs was almost 5 times higher than constructed by upstanding nanowires. is due greatly enhanced surface area for dye loading and light harvesting, also reduced charge recombination providing direct conduction pathways along crystalline...
A digital, direct nanoscale metal patterning method is developed using femtosecond laser digital processing of nanoparticles for electronics fabrication without conventional vacuum deposition or a photolithography mask. This expected to be potential alternative the electron beam lithography arbitrary in single-step, low-temperature, and non-vacuum environments.
Inkjet printing of functional materials is a key technology toward ultra-low-cost, large-area electronics. We demonstrate low-temperature 3D micro metal structure fabrication by direct inkjet nanoparticles (NPs) as versatile, structuring approach representing an alternative to conventional vacuum deposition and photolithographic methods. Metal NP ink was inkjet-printed exploit the large melting temperature drop nanomaterial ease formulation. Parametric studies on basic conditions for stable...
In this paper we have demonstrated the simple, low cost, temperature, hydrothermal growth of weeping willow ZnO nano-trees with very long branches to realize high efficiency dye-sensitized solar cells (DSSCs). We also discuss effects branching on cell efficiency. By introducing branched backbone nanowires (NWs), short circuit current density and overall light conversion NW DSSCs increased almost four times that for vertically grown NWs. The increase is attributed in surface area higher dye...
In this article, we introduce fully digital selective ZnO nanowire array growth on inkjet-printed seed patterning. Through proper natural convection suppression during hydrothermal growth, successful local can be achieved. Without any need for photolithographic processing or stamp preparation, the location easily modified when inkjet printing process is integrated with a CAD (computer-aided design) system to allow high degree of freedom design needs changed. The current proposed very fast,...
Abstract Nanofabrication has seen an increasing demand for applications in many fields of science and technology, but its production still requires relatively difficult, time-consuming expensive processes. Here we report a simple very effective one dimensional (1D) nano-patterning technology that suggests new nanofabrication method. This technique involves the control naturally propagating cracks initiated through simple, manually generated indentation, obviating necessity complicated...
The epidermal growth factor receptor (EGFR) protein has received significant attention in medical biotechnology because it is an important component cell and division. We report the results of a study on binding between EGFR associated aptamer, measured real time. Aptamers can be used for clinical purposes including macromolecular medicine basic research. In particular, aptamers are promising molecular agents targeting cancer. data were obtained in-situ with total internal reflection...
A novel six-beam piezoresistive accelerometer with self-cancelling cross-axis sensitivity was constructed using a unique porous silicon micromachining technique. The comparatively low of structure, due to the additional beams, can be simply overcome summing circuit. Moreover, significantly reduced. sensor circuit exhibit 0.68 mV/g nonlinearity < 2.0% up 8 g, 1.0%, and first resonant frequency ~4.24 kHz.
A planar, integrated total internal reflection (TIR) sensor for the characterizations of biofouling has been demonstrated based on angular interrogation Fraunhofer diffraction.This is made a two-mask process to have optical prism and built-in waveguides 4×0.25μm 2 in cross section area.The core cladding layer waveguide are silicon nitride dioxide, respectively 780nm wavelength light source used experiments.Water, ethanol, acetone glycerol, all tested illustrate basic refractive index sensing...
The UFFO (Ultra-Fast Flash Observatory) Pathfinder is a space instrument onboard the <i>Lomonosov</i> satellite scheduled to be launched in November 2011. It designed for extremely fast observation of optical counterparts Gamma Ray Bursts (GRBs). consists two subsystems; i) UBAT (UFFO Burst Alert & Trigger Telescope) and ii) SMT (Slewing Mirror Telescope). This study concerned with opto-mechanical subsystem design performance test. F/11.4 Ritchey-Chretien type telescope benefited from...