Index Catalog // ScholarsArchive@OSU

Ultrashort Near-Infrared Fiber-Optic Sensors for Carbon Dioxide Detection

Creator:: Chong, Xinyuan, Kim, Ki-Joong, Ohodnicki, Paul R., Li, Erwen, Chang, Chih-Hung, and Wang, Alan X.
Abstract:: In this paper, we report a fiber-optic carbon dioxide (CO₂) near-infrared (IR) absorption sensor with only 8-cm sensing length that is coated with nanoporous metalorganic framework material Cu-BTC (BTC = benzene-1,3, 5-tricarboxylate). The multimode optical fiber was etched by hydrofluoric acid to remove the cladding and part of the core,...
Resource Type:: Article
Full Text:: . 2002. [7] W.-C. Lai, S. Chakravarty, X. Wang, C. Lin, and R. T. Chen, “On-chip methane sensing by near

Large-scale Generation of Patterned Bubble Arrays on Printed Bi-functional Boiling Surfaces

Creator:: Choi, Chang-Ho, David, Michele, Gao, Zhongwei, Chang, Alvin, Allen, Marshall, Wang, Hailei, and Chang, Chih-hung
Abstract:: Bubble nucleation control, growth and departure dynamics is important in understanding boiling phenomena and enhancing nucleate boiling heat transfer performance. We report a novel bi-functional heterogeneous surface structure that is capable of tuning bubble nucleation, growth and departure dynamics. For the fabrication of the surface, hydrophobic polymer dot arrays are...
Resource Type:: Article
Full Text:: (2012). 13. Hou, Y., Yu, M., Chen, X., Wang, Z. & Yao, S. Recurrent filmwise and dropwise condensation

Near-infrared absorption gas sensing with metal-organic framework on optical fibers

Creator:: Chong, Xinyuan, Kim, Ki-Joong, Li, Erwen, Zhang, Yujing, Ohodnicki, Paul R., Chang, Chih-Hung, and Wang, Alan X.
Abstract:: Despite significant advantages in terms of portability and cost, near-infrared (NIR) gas sensing still remains a great challenge due to its relatively weak overtone absorption from the fundamental vibrational bond absorption at the mid-IR frequency. In this paper, we demonstrated ultra-sensitive NIR gas sensing for carbon dioxide (CO₂) at 1.57...
Resource Type:: Article
Full Text:: . Wang, C.Y. Lin, R.T. Chen, On-chip methane sensing by near-IR absorption signatures in a photonic

XingZhenyuChemistryReducingCO2DenseNanoporous.pdf

Creator:: Xing, Zhenyu, Wang, Bao, Gao, Wenyang, Pan, Changqing, Halsted, Joshua K., Chong, Elliot S., Lu, Jun, Wang, Xingfeng, Luo, Wei, Chang, Chih-Hung, Wen, Youhai, Ma, Shengqian, Amine, Khalil, and Ji, Xiulei
Abstract:: Converting CO2 to valuable materials is attractive.Herein, we report using simple metallothermic reactions to reduce atmospheric CO2 to dense nanoporous graphene. By using a Zn/Mg mixture as a reductant, the resulted nanoporous graphene exhibits highly desirable properties: high specific surface area of 1900 m2/g, a great conductivity of 1050 S/m...
Full Text:: . Lin, Z.W. Chen, Y.Z. Li, P.F. Qiang, M. Ebrahimi, W.J. Mai, C.P. Wong, Z.L. Wang, Nano Lett. 14 (2014

KimKi-JoongChemBioEnvEngPlasmonics-Enhanced.pdf

Creator:: Kim, Ki-Joong, Chong, Xinyuan, Kreider, Peter B., Ma, Guoheng, Ohodnicki, Paul R., Baltrus, John P., Wang, Alan X., and Chang, Chih-Hung
Abstract:: Combined plasmonic nanocrystals and metal–organic framework thin-films are fabricated for sensing gases in the near-infrared range. This nanocomposite thin-film shows a highly sensitive response in near-infrared absorption, which is attributed to preconcentration of gas molecules in metal–organic framework pores causing close proximity to the electromagnetic fields at the plasmonic nanocrystal...
Full Text:: . Chakravarty, A. X. Wang, C.-Y. Lin and R. T. Chen, Opt. Lett., 2011, 36, 984; (b) J. T. Robinson, L. Chen and

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:: B: Environ 91(1-2):308-318 Lai JJ, Lin YJ, Chen YH, Chang HC, Liu CJ, Zou YY, Shih YT, Wang MC

Finite difference time domain modeling of subwavelength-structured anti-reflective coatings

Creator:: Han, Katherine, Han, Hai-Yue, Stack, James, Jr., and Chang, Chih-Hung
Abstract:: The finite difference time domain (FDTD) method was used to model anti-reflective properties of a variety of sub-wavelength structures for 300 to 1300 nm input light. Light hitting non-tapered nanostructures exhibited interference patterns similar to thin film anti-reflective coatings (ARCs), increasing the anti-reflective effect at several wavelengths. The lowest reflectance...
Resource Type:: Article
Full Text:: . [12] N. Wang, Y. Zhu, W. Wei, J. J. Chen, P. Li, and Y. M. Wen, "Conversion efficiency

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:: of recipes based on the work of Chang and Chen [31]. For batch mixing, reactants were mixed in a

Synthesis of colloidal PbSe nanoparticles using a microwave-assisted segmented flow reactor

Creator:: Hostetler, Eric B., Kim, Ki-Joong, Oleksak, Richard P., Fitzmorris, Robert C., Peterson, Daniel A., Padmavathi, Chandran, Chang, Chih-Hung, Paul, Brian K., Schut, David M., and Herman, Gregory S.
Abstract:: Colloidal lead selenide nanoparticles (PbSe NPs) were synthesized using a microwave-assisted continuous flow reactor. Rapid heating of precursors was performed in the microwave reaction zone to initiate nucleation and was followed by an oil bath growth zone. In this study we have evaluated the effect of the nucleation temperature on...
Resource Type:: Article
Full Text:: -501. [8] Zhu J-J, Wang H, Xu S, Chen H-Y. Sonochemical method for the preparation of monodisperse

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:: . Mater. Chem., 2010, 20, 8134- 8138. 12. J.-Q. Xi, M. F. Schubert, J. K. Kim, E. F. Schubert, M. Chen

ScholarsArchive@OSU

Ultrashort Near-Infrared Fiber-Optic Sensors for Carbon Dioxide Detection

Large-scale Generation of Patterned Bubble Arrays on Printed Bi-functional Boiling Surfaces

Near-infrared absorption gas sensing with metal-organic framework on optical fibers

XingZhenyuChemistryReducingCO2DenseNanoporous.pdf

KimKi-JoongChemBioEnvEngPlasmonics-Enhanced.pdf

Visible-light-sensitive nanoscale Au-ZnO photocatalysts

Finite difference time domain modeling of subwavelength-structured anti-reflective coatings

Continuous precipitation of ceria nanoparticles from a continuous flow micromixer

Synthesis of colloidal PbSe nanoparticles using a microwave-assisted segmented flow reactor

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

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