Search

Your search keyword '"Huang, Tzu-Ming"' showing total 23 results
Start Over Author "Huang, Tzu-Ming" Publication Year Range Last 50 years
23 results on '"Huang, Tzu-Ming"'

6. Concentration effect on properties of Pt-NiOx nanocompounds converted from mixed chloroplatinic acid and nickel acetate precursor films using an atmospheric-pressure plasma jet.

Author

Huang, Tzu-Ming, Cheng, I-Chun, Hsu, Cheng-Che, and Chen, Jian-Zhang

Subjects
*CHLOROPLATINIC acid, *PLASMA jets, *DYE-sensitized solar cells, *NICKEL, *X-ray photoelectron spectroscopy, *PLATINUM nanoparticles
Abstract

A direct current-pulse nitrogen atmospheric-pressure plasma jet (APPJ) is used to convert Pt-NiOx nanocompounds from liquid precursor films consisting of a mixture of chloroplatinic acid and nickel acetate. The Pt-NiOx nanoparticles are well-distributed on the fluorine-doped tin oxide (FTO) glass substrates. X-ray photoelectron spectroscopy results indicate that the reaction product mainly contains metallic Pt and oxidized Ni. Electrochemical impedance spectroscopy and Tafel experiments reveal an improvement in electrochemical catalytic effects. The APPJ-processed Pt-NiOx nanocompounds on FTO glass substrates are used as the counter electrodes (CEs) of dye-sensitized solar cells (DSSCs). J − V curves indicate that DSSCs with 5-s APPJ-processed Pt-NiOx CEs showed significantly improved performance. The sample properties become stable after ∼45 s of APPJ calcination. Precursor solutions with three different mole ratios of chloroplatinic acid and nickel acetate are investigated. With the addition of an adequate amount of oxidized nickel, the transfer charge current density and electrochemical catalytic effects are enhanced. [ABSTRACT FROM AUTHOR]

Published
2020
Full Text
View/download PDF

12. On Scalable Service Function Chaining with O(1) Flowtable Entries

Author

Ren, Yi, Huang, Tzu-Ming, Lin, Kate Ching-Ju, and Tseng, Yu-Chee

Abstract

The emergence of Network Function Virtualization (NFV) enables flexible and agile service function chaining in a Software Defined Network (SDN). While this virtualization technology efficiently offers customization capability, it however comes with a cost of consuming precious TCAM resources. Due to this, the number of service chains that an SDN can support is limited by the flowtable size of a switch. To break this limitation, this paper presents CRT-Chain, a service chain forwarding protocol that requires only constant flowtable entries, regardless of the number of service chain requests. The core of CRT-Chain is an encoding mechanism that leverages Chinese Remainder Theorem (CRT) to compress the forwarding information into small labels. A switch does not need to insert forwarding rules for every service chain request, but only needs to conduct very simple modular arithmetic to extract the forwarding rules directly from CRT-Chain's labels attached in the header. We further incorporate prime reuse and path segmentation in CRT-Chain to reduce the header size and, hence, save bandwidth consumption. Our evaluation results show that, when a chain consists of no more than 5 functions, CRT-Chain actually generates a header smaller than the legacy 32-bit header defined in IETF. By enabling prime reuse and segmentation, CRT-Chain further reduces the total signaling overhead to a level lower than the conventional scheme, showing that CRT-Chain not only enables scalable flowtable-free chaining but also improves network efficiency.

Published
2018

18. Investigation of ultrashort (< 1 min) calcination processes for conversion of Pt–SnOxfrom mixture of chloroplatinic acid and tin(II) chloride

Author

Lee, Chia-Chun, Huang, Tzu-Ming, Cheng, I-Chun, and Chen, Jian-Zhang

Abstract

We investigate the ultrashort (< 1 min) calcination process for Pt–SnOxcatalysts converted from a mixture solution of chloroplatinic acid and tin(II) chloride in air. An electric furnace is used to test the ultrashort calcination of Pt–SnOxcatalysts used as counter electrodes (CEs) of DSSCs. By using a conventional electric furnace instead of an atmospheric pressure plasma jet (Metals 8:690, 2018), the effect of reactive plasma species can be ruled out, and only the bare thermal effect is considered in this study. Scanning electron microscopy reveals that Pt–SnOxnanoparticles are well-distributed on the substrates. X-ray photoelectron spectroscopy indicates the conversion of a large amount of metallic Pt and oxidized Sn. No metallic Pt is observed with 5-s calcination; however, ~ 74% Pt is converted into metallic Pt with 15-s calcination. Further increasing the calcination time does not increase the conversion rate of metallic Pt. By contrast, metallic Sn shows its maximum conversion rate of ~ 18% with 30-s calcination. Further increasing the calcination time to 30 min reduces the metallic Sn content to ~ 6%, possibly owing to Sn re-oxidation. When applying Pt–SnOxcatalysts to CEs of DSSCs, the efficiency greatly increases as the calcination time increases from 15 to 30 s. The efficiency remains relatively unchanged for calcination time of 60 s to 30 min. The efficiencies of DSSCs with a Pt–SnOxCE calcined at longer processing times (≥ 60 s) are comparable to those of DSSCs with conventional Pt CEs. The left-hand-side image shows the Pt–SnOxnanoparticulate compounds. The right-hand-side figure shows the J–V curves.

Published
2019
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results