Index Catalog // ScholarsArchive@OSU

Enhancement of pool boiling heat transfer using nanostructured surfaces on aluminum and copper

Creator:: Hendricks, Terry J., Krishnan, Shankar, Choi, Changho, Chang, Chih-hung, and Paul, Brian
Abstract:: Enhanced pool boiling critical heat fluxes (CHF) at reduced wall superheat on nanostructured substrates are reported. Nanostructured surfaces were realized using a low temperature process, microreactor-assisted-nanomaterial-deposition. Using this technique we deposited ZnO nanostructures on Al and Cu substrates. We observed pool boiling CHF of 82.5 W/cm2 with water as fluid...
Resource Type:: Article
Full Text:: – 97330 Changho Choi, Chih-hung Chang School of Chemical, Biological, and Environmental Engineering

Formation of zinc oxide films using submicron zinc particle dispersions

Creator:: Rajachidambaram, Meena S., Varga, Tamas, Kovarik, Libor, Sanghavi, Rahul, Shutthanandan, Vaithiyalingam, Thevuthasan, Suntharampillai, Han, Seung-Yeol, Chang, Chih-Hung, and Herman, Gregory S.
Abstract:: The thermal oxidation of submicron metallic Zn particles was studied as a method to form nanostructured ZnO films. The particles used for this work were characterized by electron microscopy, x ray diffraction, and thermal analysis to evaluate the Zn-ZnO core shell structure, surface morphology, and oxidation characteristics. Significant nanostructural changes...
Resource Type:: Article
Full Text:: National Laboratory, Richland, Washington 99354 Seung-Yeol Han, Chih-Hung Chang, and Gregory S. Hermana

Cadmium sulfide thin film deposition: A parametric study using microreactor-assisted chemical solution deposition

Creator:: Ramprasad, Sudhir, Su, Yu-Wei, Chang, Chih-hung, Paul, Brian K., and Palo, Daniel R.
Abstract:: Cadmium sulfide (CdS) thin films are commonly used as buffer layers in thin film solar cells and can be produced by a number of solution and vacuum methods. We report the continuous solution deposition of CdS on fluorine-doped tin oxide coated glass substrates using Microreactor-Assisted Solution Deposition (MASD (TM)). A...
Resource Type:: Article
Full Text:: chemical solution deposition Sudhir Ramprasad a,d, Yu-Wei Su b,d, Chih-hung Chang b,d, Brian K. Paul c,d

Continuous precipitation of ceria nanoparticles from a continuous flow micromixer

Creator:: Tseng, Chih Heng T., Paul, Brian K., Chang, Chih-Hung, and Engelhard, Mark H.
Abstract:: Cerium oxide nanoparticles were continuously precipitated from a solution of cerium(III) nitrate and ammonium hydroxide using a static microchannel T-mixer. Tmixer synthesis results were compared with synthesis results from batch precipitation. Findings show that the method of mixing is important in the ceria precipitation process. Uniform porous film structures and...
Resource Type:: Article
Full Text:: nanoparticles from a continuous flow micromixer Chih Heng T. Tseng & Brian K. Paul & Chih-Hung Chang & Mark H

Nanostructured ZnO as Biomimetic Anti-reflective Coatings on Textured Silicon Using a Continuous Solution Process

Creator:: Han, Seung-Yeol, Paul, Brian K., and Chang, Chih-hung
Abstract:: A novel table-top, microreactor-assisted nanomaterial deposition (MAND™) process, which combines the merits of microreaction technology with solution-phase nanomaterial synthesis and film deposition, was used to grow a nanostructured ZnO anti-reflective coating on a textured silicon substrate from aqueous solution. The subwavelength, anti-reflective nanostructures mimicked the structure and performance of the...
Resource Type:: Article
Full Text:: b and Chih-hung Chang a, * a School of Chemical, Biological, and Environmental Engineering

Dense CdS Thin Films on Fluorine-doped Tin Oxide Coated Glass by High-rate Microreactor-Assisted Solution Deposition

Creator:: Su, Yu-Wei, Ramprasad, Sudhir, Han, Seung Yeol, Wang, Wei, Ryu, Si Ok, Palo, Daniel R., Paul, Brian K., and Chang, Chih-hung
Abstract:: Continuous microreactor-assisted solution deposition is demonstrated for the deposition of CdS thin films on fluorine-doped tin oxide (FTO) coated glass. The continuous flow system consists of a microscale T-junction micromixer with the co-axial water circulation heat exchanger to control the reacting chemical flux and optimize the heterogeneous surface reaction. Dense,...
Resource Type:: Article
Full Text:: Solution Deposition Yu-Wei Sua' f*, Sudhir Ramprasadb' f, Seung Yeol Han' f, Wei Wang' f, Si Ok Ryuc

Effects of Fluid Flow on the Growth and Assembly of ZnO Nanocrystals in a Continuous Flow Microreactor

Creator:: Choi, Chang-Ho, Su, Yu-Wei, and Chang, Chih-hung
Abstract:: Assembly of nanocrystals is considered one of the most promising approaches to design nano-, microstructures, and complex mesoscopic architectures. A variety of strategies to induce nanocrystal assembly have been reported, including directed assembly methods that apply external forces to fabricate assembled structures. In this study ZnO nanocrystals were synthesized in...
Resource Type:: Article
Full Text:: -Wei Su, a and Chih-hung Chang* a Received (in XXX, XXX) Xth XXXXXXXXX 20XX, Accepted Xth

Visible-light-sensitive nanoscale Au-ZnO photocatalysts

Creator:: Kim, Ki-Joong, Kreider, Peter B., Chang, Chih-Hung, Park, Chul-Min, and Ahn, Ho-Geun
Abstract:: The role of gold nanoparticles supported on ZnO in photocatalytic activity for dye degradation was investigated. To do this, gold nanoparticles supported on ZnO (Au-ZnO) were prepared using a simple co-precipitation method. The prepared nanocatalyst was characterized by high resolution transmission electron microscopy, X-ray diffraction, temperature programmed reduction, X-ray photoelectron...
Resource Type:: Article
Full Text:: -Joong Kima, Peter B. Kreider', Chih-Hung Chang" Chul-Min Parkb, Ho-Geun Ahnb a Oregon Process

Growth Kinetics of Copper Sulfide Thin Films by Chemical Bath Deposition

Creator:: Vas-Umnuay, Paravee and Chang, Chih-hung
Abstract:: Copper sulfides (CuxS) are compound semiconductor materials that exhibit considerable variations of optical and electrical properties. Copper sulfide thin films can be used in many applications, such as solar control coatings, solar cells, photothermal conversion of solar energy, electroconductive coatings, and microwave shielding coatings. In this paper, chemical bath deposition...
Resource Type:: Article
Full Text:: Kinetics of Copper Sulfide Thin Films by Chemical Bath Deposition Paravee Vas-Umnuay and Chih-hung Chang∗,z

Continuous Microreactor-Assisted Solution Deposition for Scalable Production of CdS Films

Creator:: Ramprasad, Sudhir, Su, Yu-Wei, Chang, Chih-Hung, Paul, Brian K., and Palo, Daniel R.
Abstract:: Solution deposition offers an attractive, low temperature option in the cost effective production of thin film solar cells. Continuous microreactor-assisted solution deposition (MASD) was used to produce nanocrystalline cadmium sulfide (CdS) films on fluorine doped tin oxide (FTO) coated glass substrates with excellent uniformity. We report a novel liquid coating...
Resource Type:: Article
Full Text:: Microreactor-Assisted Solution Deposition for Scalable Production of CdS Films Sudhir Ramprasad,a,b,z Yu-Wei Su

ScholarsArchive@OSU

Enhancement of pool boiling heat transfer using nanostructured surfaces on aluminum and copper

Formation of zinc oxide films using submicron zinc particle dispersions

Cadmium sulfide thin film deposition: A parametric study using microreactor-assisted chemical solution deposition

Continuous precipitation of ceria nanoparticles from a continuous flow micromixer

Nanostructured ZnO as Biomimetic Anti-reflective Coatings on Textured Silicon Using a Continuous Solution Process

Dense CdS Thin Films on Fluorine-doped Tin Oxide Coated Glass by High-rate Microreactor-Assisted Solution Deposition

Effects of Fluid Flow on the Growth and Assembly of ZnO Nanocrystals in a Continuous Flow Microreactor

Visible-light-sensitive nanoscale Au-ZnO photocatalysts

Growth Kinetics of Copper Sulfide Thin Films by Chemical Bath Deposition

Continuous Microreactor-Assisted Solution Deposition for Scalable Production of CdS Films

Limit your search

Academic Affiliation

Creator

Date

Decade

Language

Peer Reviewed

Resource Type

Rights Statement

Search Constraints

Search Results

Limit your search