Media 2: White light on-axis digital holographic microscopy based on spectral phase shifting

Originally published in Optics Express on 09 January 2006 (oe-14-1-229

Media 1: White light on-axis digital holographic microscopy based on spectral phase shifting

Originally published in Optics Express on 09 January 2006 (oe-14-1-229

Highly Increased Flow-Induced Power Generation on Plasmonically Carbonized Single-Walled Carbon Nanotube

We generate networks and carbonization between individualized single-walled carbon nanotubes (SWCNTs) by an optimized plasmonic heating process using a halogen lamp to improve electrical properties for flow-induced energy harvesting. These properties were characterized by Raman spectra, a field-emission-scanning probe, transmission electron microscopy, atomic force microscopy and thermographic camera. The electrical sheet resistance of carbonized SWCNTs was decreased to 2.71 kΩ/□, 2.5 times smaller than normal-SWCNTs. We demonstrated flow-induced voltage generation on SWCNTs at various ion concentrations of NaCl. The generated voltage and current for the carbonized-SWCNTs were 9.5 and 23.5 times larger than for the normal-SWCNTs, respectively, based on the electron dragging mechanism

Highly Enhanced Electromechanical Stability of Large-Area Graphene with Increased Interfacial Adhesion Energy by Electrothermal-Direct Transfer for Transparent Electrodes

Graphene, a two-dimensional sheet of carbon atoms in a hexagonal lattice structure, has been extensively investigated for research and industrial applications as a promising material with outstanding electrical, mechanical, and chemical properties. To fabricate graphene-based devices, graphene transfer to the target substrate with a clean and minimally defective surface is the first step. However, graphene transfer technologies require improvement in terms of uniform transfer with a clean, nonfolded and nontorn area, amount of defects, and electromechanical reliability of the transferred graphene. More specifically, uniform transfer of a large area is a key challenge when graphene is repetitively transferred onto pretransferred layers because the adhesion energy between graphene layers is too low to ensure uniform transfer, although uniform multilayers of graphene have exhibited enhanced electrical and optical properties. In this work, we developed a newly suggested electrothermal-direct (ETD) transfer method for large-area high quality monolayer graphene with less defects and an absence of folding or tearing of the area at the surface. This method delivers uniform multilayer transfer of graphene by repetitive monolayer transfer steps based on high adhesion energy between graphene layers and the target substrate. To investigate the highly enhanced electromechanical stability, we conducted mechanical elastic bending experiments and reliability tests in a highly humid environment. This ETD-transferred graphene is expected to replace commercial transparent electrodes with ETD graphene-based transparent electrodes and devices such as a touch panels with outstanding electromechanical stability

Highly Enhanced Electromechanical Stability of Large-Area Graphene with Increased Interfacial Adhesion Energy by Electrothermal-Direct Transfer for Transparent Electrodes

Graphene, a two-dimensional sheet of carbon atoms in a hexagonal lattice structure, has been extensively investigated for research and industrial applications as a promising material with outstanding electrical, mechanical, and chemical properties. To fabricate graphene-based devices, graphene transfer to the target substrate with a clean and minimally defective surface is the first step. However, graphene transfer technologies require improvement in terms of uniform transfer with a clean, nonfolded and nontorn area, amount of defects, and electromechanical reliability of the transferred graphene. More specifically, uniform transfer of a large area is a key challenge when graphene is repetitively transferred onto pretransferred layers because the adhesion energy between graphene layers is too low to ensure uniform transfer, although uniform multilayers of graphene have exhibited enhanced electrical and optical properties. In this work, we developed a newly suggested electrothermal-direct (ETD) transfer method for large-area high quality monolayer graphene with less defects and an absence of folding or tearing of the area at the surface. This method delivers uniform multilayer transfer of graphene by repetitive monolayer transfer steps based on high adhesion energy between graphene layers and the target substrate. To investigate the highly enhanced electromechanical stability, we conducted mechanical elastic bending experiments and reliability tests in a highly humid environment. This ETD-transferred graphene is expected to replace commercial transparent electrodes with ETD graphene-based transparent electrodes and devices such as a touch panels with outstanding electromechanical stability

Media 2: Simultaneous measurement method of total and self-interference for the volumetric thickness-profilometer

Originally published in Optics Express on 02 February 2009 (oe-17-3-1352

Highly Enhanced Electromechanical Stability of Large-Area Graphene with Increased Interfacial Adhesion Energy by Electrothermal-Direct Transfer for Transparent Electrodes

Graphene, a two-dimensional sheet of carbon atoms in a hexagonal lattice structure, has been extensively investigated for research and industrial applications as a promising material with outstanding electrical, mechanical, and chemical properties. To fabricate graphene-based devices, graphene transfer to the target substrate with a clean and minimally defective surface is the first step. However, graphene transfer technologies require improvement in terms of uniform transfer with a clean, nonfolded and nontorn area, amount of defects, and electromechanical reliability of the transferred graphene. More specifically, uniform transfer of a large area is a key challenge when graphene is repetitively transferred onto pretransferred layers because the adhesion energy between graphene layers is too low to ensure uniform transfer, although uniform multilayers of graphene have exhibited enhanced electrical and optical properties. In this work, we developed a newly suggested electrothermal-direct (ETD) transfer method for large-area high quality monolayer graphene with less defects and an absence of folding or tearing of the area at the surface. This method delivers uniform multilayer transfer of graphene by repetitive monolayer transfer steps based on high adhesion energy between graphene layers and the target substrate. To investigate the highly enhanced electromechanical stability, we conducted mechanical elastic bending experiments and reliability tests in a highly humid environment. This ETD-transferred graphene is expected to replace commercial transparent electrodes with ETD graphene-based transparent electrodes and devices such as a touch panels with outstanding electromechanical stability

Synthesis, Structure, and Ethanol Gas Sensing Properties of In₂O₃ Nanorods Decorated with Bi₂O₃ Nanoparticles

Bi₂O₃-decorated In₂O₃ nanorods were synthesized using a one-step process, and their structure, as well as the effects of decoration of In₂O₃ nanorods with Bi₂O₃ on the ethanol gas-sensing properties were examined. The multiple networked Bi₂O₃-decorated In₂O₃ nanorod sensor showed responses of 171–1774% at ethanol concentrations of 10–200 ppm at 200 °C. The responses of the Bi₂O₃-decorated In₂O₃ nanorod sensor were stronger than those of the pristine-In₂O₃ nanorod sensors by 1.5–4.9 times at the corresponding concentrations. The two sensors exhibited short response times and long recovery times. The optimal Bi concentration in the Bi₂O₃-decorated In₂O₃ nanorod sensor and the optimal operation temperature of the sensor were 20% and 200 °C, respectively. The Bi₂O₃-decorated In₂O₃ nanorod sensor showed selectivity for ethanol gas over other gases. The origin of the enhanced response, sensing speed, and selectivity for ethanol gas of the Bi₂O₃-decorated In₂O₃ nanorod sensor to ethanol gas is discussed

Fully Automated Multiple Standard Addition on a Centrifugal Microfluidic System

We herein describe a novel centrifugal microfluidic system to achieve multiple standard additions, which could minimize the effects of matrix interference and consequently lead to more accurate and reliable measurements of analyte concentrations in complex samples. The system leverages laser-irradiated ferrowax microvalves to automatically control fluid transfer on the disc without the need for external pumps or pressure systems, simplifying the procedures and eliminating the need for manual intervention. The disc incorporates metering chambers with rationally designed varying sizes, which could lead to the formation of six standard addition samples very rapidly in just 2.5 min. The final solutions are designed to contain a target component at gradually increasing concentrations but have an equal final volume containing the same amount of an analyte solution, thereby equalizing the matrix effect that is supposedly caused by the unknown components in the analyte solution. By utilizing this design principle, we were able to successfully quantify a model target component, salivary thiocyanate ions, that could be used as a biomarker for exposure to tobacco smoke. Our centrifugal microfluidic system holds great promise as a powerful analytical tool to achieve fully automated diagnostic microsystems involving a standard addition process

Media 4: Simultaneous measurement method of total and self-interference for the volumetric thickness-profilometer

Originally published in Optics Express on 02 February 2009 (oe-17-3-1352