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Cheng YW, Hsieh TH, Huang YC, Tseng PH, Wang YZ, Ho KS, Huang YJ. Calcined Co(II)-Chelated Polyazomethine as Cathode Catalyst of Anion Exchange Membrane Fuel Cells. Polymers (Basel) 2022; 14:polym14091784. [PMID: 35566952 PMCID: PMC9101812 DOI: 10.3390/polym14091784] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/09/2022] [Accepted: 04/25/2022] [Indexed: 02/05/2023] Open
Abstract
Polyazomethine (PAM) prepared from the polycondensation between p-phenylene diamine (PDA) and p-terephthalaldehyde (PTAl) via Schiff reaction can physically crosslink (complex) with Co ions. Co-complexed PAM (Co-PAM) in the form of gel is calcined to become a Co, N-co-doped carbonaceous matrix (Co-N-C), acting as cathode catalyst of an anion exchange membrane fuel cell (AEMFC). The obtained Co-N-C catalyst demonstrates a single-atom structure with active Co centers seen under the high-resolution transmission electron microscopy (HRTEM). The Co-N-C catalysts are also characterized by XRD, SEM, TEM, XPS, BET, and Raman spectroscopy. The Co-N-C catalysts demonstrate oxygen reduction reaction (ORR) activity in the KOH(aq) by expressing an onset potential of 1.19–1.37 V vs. RHE, a half wave potential of 0.70–0.92 V, a Tafel slope of 61–89 mV/dec., and number of exchange electrons of 2.48–3.79. Significant ORR peaks appear in the current–voltage (CV) polarization curves for the Co-N-C catalysts that experience two-stage calcination higher than 900 °C, followed by double acid leaching (CoNC-1000A-900A). The reduction current of CoNC-1000A-900A is comparable to that of commercial Pt-implanted carbon (Pt/C), and the max power density of the single cell using CoNC-1000A-900A as cathode catalyst reaches 275 mW cm−2.
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Affiliation(s)
- Yu-Wei Cheng
- Department of Chemical Engineering, Ming Chi University of Technology, New Taipei City 243303, Taiwan;
| | - Tar-Hwa Hsieh
- Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, 415, Chien-Kuo Road, Kaohsiung 80782, Taiwan; (T.-H.H.); (Y.-C.H.); (Y.-J.H.)
| | - Yu-Chang Huang
- Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, 415, Chien-Kuo Road, Kaohsiung 80782, Taiwan; (T.-H.H.); (Y.-C.H.); (Y.-J.H.)
| | - Po-Hao Tseng
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan;
| | - Yen-Zen Wang
- Department of Chemical and Materials Engineering, National Yu-Lin University of Science & Technology, 123, Sec. 3, University Road, Dou-Liu City, Yun-Lin 64301, Taiwan
- Correspondence: (Y.-Z.W.); (K.-S.H.)
| | - Ko-Shan Ho
- Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, 415, Chien-Kuo Road, Kaohsiung 80782, Taiwan; (T.-H.H.); (Y.-C.H.); (Y.-J.H.)
- Correspondence: (Y.-Z.W.); (K.-S.H.)
| | - Yue-Jie Huang
- Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, 415, Chien-Kuo Road, Kaohsiung 80782, Taiwan; (T.-H.H.); (Y.-C.H.); (Y.-J.H.)
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2
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Huang WY, Jheng LC, Hsieh TH, Ho KS, Wang YZ, Gao YJ, Tseng PH. Calcined Co(II)-Triethylenetetramine, Co(II)- Polyaniline-Thiourea as the Cathode Catalyst of Proton Exchanged Membrane Fuel Cell. Polymers (Basel) 2020; 12:polym12123070. [PMID: 33371521 PMCID: PMC7767545 DOI: 10.3390/polym12123070] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 12/17/2020] [Accepted: 12/21/2020] [Indexed: 02/04/2023] Open
Abstract
Triethylenetetramine (TETA) and thiourea complexed Cobalt(II) (Co(II)) ions are used as cathode catalysts for proton exchanged membrane fuel cells (PEMFCs) under the protection of polyaniline (PANI) which can become a conducting medium after calcination. Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) spectra clearly reveal the presence of typical carbon nitride and sulfide bonds of the calcined Nitrogen (N)- or Sulfur (S)-doped co-catalysts. Clear (002) and (100) planes of carbon-related X-ray diffraction patterns are found for co-catalysts after calcination, related to the formation of a conducting medium after the calcination of PANI. An increasing intensity ratio of the D to G band of the Raman spectra reveal the doping of N and S elements. More porous surfaces of co-catalysts are found in scanning electronic microscopy (SEM) micropictures when prepared in the presence of both TETA and thiourea (CoNxSyC). Linear sweep voltammetry (LSV) curves show the highest reducing current to be 4 mAcm−2 at 1600 rpm for CoNxSyC, indicating the necessity for both N- and S-doping. The membrane electrode assemblies (MEA) prepared with the cathode made of CoNxSyC produces the highest maximum power density, close to 180 mW cm−2.
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Affiliation(s)
- Wen-Yao Huang
- Department of Photonics, National Sun Yat-sen University, 70 Lienhai Rd., Kaohsiung 80424, Taiwan;
| | - Li-Cheng Jheng
- Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, 415, Chien-Kuo Road, Kaohsiung 80782, Taiwan; (L.-C.J.); (T.-H.H.); (Y.-J.G.); (P.-H.T.)
| | - Tar-Hwa Hsieh
- Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, 415, Chien-Kuo Road, Kaohsiung 80782, Taiwan; (L.-C.J.); (T.-H.H.); (Y.-J.G.); (P.-H.T.)
| | - Ko-Shan Ho
- Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, 415, Chien-Kuo Road, Kaohsiung 80782, Taiwan; (L.-C.J.); (T.-H.H.); (Y.-J.G.); (P.-H.T.)
- Correspondence: (K.-S.H.); (Y.-Z.W.)
| | - Yen-Zen Wang
- Department of Chemical and Materials Engineering, National Yun-Lin University of Science and Technology, Yun-Lin 64002, Taiwan
- Correspondence: (K.-S.H.); (Y.-Z.W.)
| | - Yi-Jhun Gao
- Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, 415, Chien-Kuo Road, Kaohsiung 80782, Taiwan; (L.-C.J.); (T.-H.H.); (Y.-J.G.); (P.-H.T.)
| | - Po-Hao Tseng
- Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, 415, Chien-Kuo Road, Kaohsiung 80782, Taiwan; (L.-C.J.); (T.-H.H.); (Y.-J.G.); (P.-H.T.)
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3
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Hsiao JH, He Y, Yu JH, Tseng PH, Hua WH, Low MC, Tsai YH, Cai CJ, Hsieh CC, Kiang YW, Yang CC, Zhang Z. Enhancements of Cancer Cell Damage Efficiencies in Photothermal and Photodynamic Processes through Cell Perforation and Preheating with Surface Plasmon Resonance of Gold Nanoring. Molecules 2018; 23:molecules23123157. [PMID: 30513670 PMCID: PMC6321016 DOI: 10.3390/molecules23123157] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 11/27/2018] [Accepted: 11/30/2018] [Indexed: 11/22/2022] Open
Abstract
The methods of cell perforation and preheating are used for increasing cell uptake efficiencies of gold nanorings (NRIs), which have the localized surface plasmon resonance wavelength around 1064 nm, and photosensitizer, AlPcS, and hence enhancing the cell damage efficiency through the photothermal (PT) and photodynamic (PD) effects. The perforation and preheating effects are generated by illuminating a defocused 1064-nm femtosecond (fs) laser and a defocused 1064-nm continuous (cw) laser, respectively. Cell damage is produced by illuminating cell samples with a focused 1064-nm cw laser through the PT effect, a focused 1064-nm fs laser through both PT and PD effects, and a focused 660-nm cw laser through the PD effect. Under various conditions with and without cell wash before laser illumination, through either perforation or preheating process, cell uptake and hence cell damage efficiencies can be enhanced. Under our experimental conditions, perforation can be more effective at enhancing cell uptake and damage when compared with preheating.
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Affiliation(s)
- Jen-Hung Hsiao
- Institute of Photonics and Optoelectronics, and Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
| | - Yulu He
- Institute of Photonics and Optoelectronics, and Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
- Institute of Micro/Nano Photonic Materials and Application, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
| | - Jian-He Yu
- Institute of Photonics and Optoelectronics, and Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
| | - Po-Hao Tseng
- Institute of Photonics and Optoelectronics, and Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
| | - Wei-Hsiang Hua
- Institute of Photonics and Optoelectronics, and Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
| | - Meng Chun Low
- Institute of Photonics and Optoelectronics, and Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
| | - Yu-Hsuan Tsai
- Institute of Photonics and Optoelectronics, and Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
| | - Cheng-Jin Cai
- Institute of Photonics and Optoelectronics, and Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
| | - Cheng-Che Hsieh
- Institute of Photonics and Optoelectronics, and Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
| | - Yean-Woei Kiang
- Institute of Photonics and Optoelectronics, and Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
| | - Chih-Chung Yang
- Institute of Photonics and Optoelectronics, and Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
| | - Zhengxi Zhang
- Key Laboratory of Biomedical Information Engineering of Education Ministry, Institute of Biomedical Analytical Technology and Instrumentation, School of Life Science and Technology, Xi'an Jiaotong University, No.28, Xianning West Road, Xi'an 710049, Shanxi, China.
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Yin A, Tseng PH, Rajangam S, Lebedev MA, Nicolelis MAL. Place Cell-Like Activity in the Primary Sensorimotor and Premotor Cortex During Monkey Whole-Body Navigation. Sci Rep 2018; 8:9184. [PMID: 29907789 PMCID: PMC6003955 DOI: 10.1038/s41598-018-27472-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 06/04/2018] [Indexed: 11/28/2022] Open
Abstract
Primary motor (M1), primary somatosensory (S1) and dorsal premotor (PMd) cortical areas of rhesus monkeys previously have been associated only with sensorimotor control of limb movements. Here we show that a significant number of neurons in these areas also represent body position and orientation in space. Two rhesus monkeys (K and M) used a wheelchair controlled by a brain-machine interface (BMI) to navigate in a room. During this whole-body navigation, the discharge rates of M1, S1, and PMd neurons correlated with the two-dimensional (2D) room position and the direction of the wheelchair and the monkey head. This place cell-like activity was observed in both monkeys, with 44.6% and 33.3% of neurons encoding room position in monkeys K and M, respectively, and the overlapping populations of 41.0% and 16.0% neurons encoding head direction. These observations suggest that primary sensorimotor and premotor cortical areas in primates are likely involved in allocentrically representing body position in space during whole-body navigation, which is an unexpected finding given the classical hierarchical model of cortical processing that attributes functional specialization for spatial processing to the hippocampal formation.
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Affiliation(s)
- A Yin
- Duke Center for Neuroengineering, Duke University, Durham, NC, 27710, USA.,Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - P H Tseng
- Duke Center for Neuroengineering, Duke University, Durham, NC, 27710, USA.,Department of Neurobiology, Duke University Medical Center, Durham, NC, 27710, USA
| | - S Rajangam
- Duke Center for Neuroengineering, Duke University, Durham, NC, 27710, USA.,Department of Neurobiology, Duke University Medical Center, Durham, NC, 27710, USA
| | - M A Lebedev
- Duke Center for Neuroengineering, Duke University, Durham, NC, 27710, USA.,Department of Neurobiology, Duke University Medical Center, Durham, NC, 27710, USA
| | - M A L Nicolelis
- Duke Center for Neuroengineering, Duke University, Durham, NC, 27710, USA. .,Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA. .,Department of Neurobiology, Duke University Medical Center, Durham, NC, 27710, USA. .,Department of Psychology and Neuroscience, Duke University, Durham, NC, 27708, USA. .,Edmond and Lily Safra International Institute of Neuroscience of Natal, Natal, 59066060, Brazil.
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He Y, Hua WH, Low MC, Tsai YH, Cai CJ, Chiang HC, Yu JH, Hsiao JH, Tseng PH, Kiang YW, Yang CC, Zhang Z. Exocytosis of gold nanoparticle and photosensitizer from cancer cells and their effects on photodynamic and photothermal processes. Nanotechnology 2018; 29:235101. [PMID: 29570098 DOI: 10.1088/1361-6528/aab933] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We first illustrate the faster decrease of the photothermal (PT) effect with the delay time of laser treatment, in which the illumination of a 1064 nm laser effectively excites the localized surface plasmon (LSP) resonance of cell-up-taken gold nanoring (NRI) linked with a photosensitizer (PS), when compared with the photodynamic (PD) effect produced by the illumination of a 660 nm laser for effective PS excitation. The measurement results of the metal contents of Au NRI and PS based on inductively coupled plasma mass spectroscopy and the PS fluorescence intensity based on flow cytometry show that the linkage of NRI and PS is rapidly broken for releasing PS through the effect of glutathione in lysosome after cell uptake. Meanwhile, NRI escapes from a cell with a high rate such that the PT effect decays fast while the released PS can stay inside a cell longer for producing a prolonged PD effect. The effective delivery of PS through the linkage with Au NRI for cell uptake and the advantageous effect of LSP resonance at a PS absorption wavelength on the PD process are also demonstrated.
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Affiliation(s)
- Yulu He
- Key Laboratory of Biomedical Information Engineering of Education Ministry, Institute of Biomedical Analytical Technology and Instrumentation, School of Life Science and Technology, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an, Shaanxi, 710049 People's Republic of China. Institute of Photonics and Optoelectronics, National Taiwan University, No. 1, Section 4, Roosevelt, Road, Taipei, 10617 Taiwan
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Tseng PH, Wang YZ, Hsieh TH, Ho KS, Tsai CH, Chen KT. Preparation of sub 3 nm copper nanoparticles by microwave irradiation in the presence of triethylene tetramin. Nanotechnology 2018; 29:085603. [PMID: 29350198 DOI: 10.1088/1361-6528/aaa35e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The preparation of sub 3 nm copper nanoparticles (CuNPs) in ethylene glycol (EG) using triethylene tetramine (TETA) as chelating and reducing agents via a rapid microwave (MW) irradiation is reported. The sub 3 nm CuNPs after MW irradiation are clearly seen from the electronic micrographs. The firm chelation of Cu2+ by TETA is illustrated by the dark blue color of Cu2+/TETA/EG solution and the redox reaction is confirmed by the appearance of red color of the mixtures. The optimal mole ratio of TETA/Cu 2+ is found to be 2.5/1 for preparing sub 3 nm CuNPs under the MW irradiation, operated at 800 W for 1 min. The plasmonic absorption λ max demonstrated in UV-vis spectra are found to close to 200 nm for sub 3 nm CuNPs, comparing to 500 ∼ 600 nm for regular, larger CuNPs. The extremely low Tm around 30 °C and the fusion/recrystallization sequence of sub 3 nm CuNPs can be directly measured by their differential scanning calorimetry thermograms.
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Affiliation(s)
- Po-Hao Tseng
- Graduate Institute of Electrical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
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Hsieh TH, Wang YZ, Tseng PH, Ho KS, Tsai YJ. Electrospun highly transparent, conducting Ag@polyacrylonitrile nanofibers prepared by post thermal treatment in the presence of tetraanilines. Polym Degrad Stab 2017. [DOI: 10.1016/j.polymdegradstab.2017.08.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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He Y, Hsiao JH, Yu JH, Tseng PH, Hua WH, Low MC, Tsai YH, Cai CJ, Hsieh CC, Kiang YW, Yang CC, Zhang Z. Cancer cell death pathways caused by photothermal and photodynamic effects through gold nanoring induced surface plasmon resonance. Nanotechnology 2017; 28:275101. [PMID: 28557805 DOI: 10.1088/1361-6528/aa75ad] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The different death pathways of cancer cells under the conditions of the photothermal (PT), effect, photodynamic (PD) effect, and their combination are evaluated. By incubating cells with Au nanoring (NRI) either linked with the photosensitizer, AlPcS, or not, the illumination of a visible continuous laser for exciting the photosensitizer or an infrared femtosecond laser for exciting the localized surface plasmon resonance of Au NRI, leads to various PT and PD conditions for study. Three different staining dyes are used for identifying the cell areas of different damage conditions at different temporal points of observation. The cell death pathways and apoptotic evolution speeds under different cell treatment conditions are evaluated based on the calibration of the threshold laser fluences for causing early-apoptosis (EA) and necrosis (NE) or late-apoptosis (LA). It is found that with the PT effect only, strong cell NE is generated and the transition from EA into LA is faster than that caused by the PD effect when the EA stage is reached within 0.5 h after laser illumination. By combining the PT and PD effects, in the first few hours, the transition speed becomes lower, compared to the case of the PT effect only, when both Au NRIs internalized into cells and adsorbed on cell membrane exist. When the Au NRIs on cell membrane is removed, in the first few hours, the transition speed becomes higher, compared to the case of the PD effect only.
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Affiliation(s)
- Yulu He
- Key Laboratory of Biomedical Information Engineering of Education Ministry, Institute of Biomedical Analytical Technology and Instrumentation, School of Life Science and Technology, Xi'an Jiaotong University, No.28, Xianning West Road, Xi'an, Shaanxi, 710049 People's Republic of China. Institute of Photonics and Optoelectronics, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, 10617 Taiwan
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Chu CK, Tu YC, Hsiao JH, Yu JH, Yu CK, Chen SY, Tseng PH, Chen S, Kiang YW, Yang CC. Combination of photothermal and photodynamic inactivation of cancer cells through surface plasmon resonance of a gold nanoring. Nanotechnology 2016; 27:115102. [PMID: 26878331 DOI: 10.1088/0957-4484/27/11/115102] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We demonstrate effective inactivation of oral cancer cells SAS through a combination of photothermal therapy (PTT) and photodynamic therapy (PDT) effects based on localized surface plasmon resonance (LSPR) around 1064 nm in wavelength of a Au nanoring (NRI) under femtosecond (fs) laser illumination. The PTT effect is caused by the LSPR-enhanced absorption of the Au NRI. The PDT effect is generated by linking the Au NRI with the photosensitizer of sulfonated aluminum phthalocyanines (AlPcS) for producing singlet oxygen through the LSPR-enhanced two-photon absorption (TPA) excitation of AlPcS. The laser threshold intensity for cancer cell inactivation with the applied Au NRI linked with AlPcS is significantly lower when compared to that with the Au NRI not linked with AlPcS. The comparison of inactivation threshold intensity between the cases of fs and continuous laser illuminations at the same wavelength and with the same average power confirms the crucial factor of TPA under fs laser illumination for producing the PDT effect.
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Affiliation(s)
- Chih-Ken Chu
- Institute of Photonics and Optoelectronics, National Taiwan University, No. 1, section 4, Roosevelt Road, Taipei, 10617 Taiwan
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Wang YZ, Tsai MJ, Hsieh TH, Tseng PH, Lu CY, Ho KS. Studies on one-dimensional polyanilines prepared with n-dodecylbenzenesulfonic and camphorsulfonic acids. POLYM INT 2015. [DOI: 10.1002/pi.4954] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Yen-Zen Wang
- Department of Chemical and Materials Engineering; National Yun-Lin University of Science and Technology; 640 Yun-Lin Taiwan
| | - Ming-Jer Tsai
- Department of Chemical and Materials Engineering; National Kaohsiung University of Applied Sciences; 415 Chien-Kuo Road Kaohsiung 807 Taiwan
| | - Tar-Hwa Hsieh
- Department of Chemical and Materials Engineering; National Kaohsiung University of Applied Sciences; 415 Chien-Kuo Road Kaohsiung 807 Taiwan
| | - Po-Hao Tseng
- Graduate Institute of Electrical Engineering; National Taiwan University; No. 1, Sec. 4, Roosevelt Road Taipei 10617 Taiwan
| | - Chung-Yi Lu
- Department of Chemical and Materials Engineering; National Kaohsiung University of Applied Sciences; 415 Chien-Kuo Road Kaohsiung 807 Taiwan
| | - Ko-Shan Ho
- Department of Chemical and Materials Engineering; National Kaohsiung University of Applied Sciences; 415 Chien-Kuo Road Kaohsiung 807 Taiwan
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Yang FC, Shih FJ, Tseng PH, Wang SS, Shih FJ. Holistic care for pediatric organ transplant recipients and their families during their dark postoperative recovery stage in the hospital. Transplant Proc 2014; 46:1026-8. [PMID: 24815118 DOI: 10.1016/j.transproceed.2013.11.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 11/15/2013] [Indexed: 11/25/2022]
Abstract
INTRODUCTION This study explored the difficulties in caring for pediatric organ transplant recipients (POTR) and their families during dark recovery experiences (DRE) in the hospital from the perspectives of Taiwan organ transplant health professionals (OTHP). METHODS A qualitative design was used, with a purposive sample of OTHP including OT surgeons (OTS) and nursing groups. Data were collected by thorough face-to-face interviews and were analyzed using content analysis. RESULTS Fifty-five subjects (39 female, 16 male) participated in this project. They included 15 OTS and 40 nurses. The nurses included registered nurses (n = 27), nurse practitioners (n = 5), and assistant or head nurses (n = 8). Their ages ranged from 25 to 66 (mean = 38.4) years old. Thirty-eight (69%) had college education, and 17 (31%) had graduate education. Their OT careers ranged from between 3 to 40 (mean = 23.8) years for OTS, and 0.5 to 15 (mean = 4.10) years for the OT nursing group. Five types of caring difficulties were reported: (1) threat of OT failure, (2) work overload, (3) insufficient collaboration within interdisciplinary teams due to incongruent surgical and nursing opinions, (4) poor communication between OTHP and POTR, and (5) lack of competent professional OT care. CONCLUSIONS The following suggestions were made to help relieve the OTHPs' stress in providing holistic care for POTR and their families during DRE: (1) increasing the amount of experienced OT manpower and professional communication liaisons, (2) providing systematic on-the-job interdisciplinary case seminars and OT workshops, and (3) enhancing the POTR's mental health care and helping manage their distress of DRE.
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Affiliation(s)
- F C Yang
- Department of Nursing, Central Taiwan University of Science and Technology, and Institute of Allied Health Sciences, College of Medicine, National Cheng Kung University, Taichung, Taiwan
| | - F Jong Shih
- Department of Gerontological Care and Management, Chang Gung University of Science and Technology, Taoyuan, Taiwan
| | - P H Tseng
- Department of Nursing, National Taiwan University Hospital, Taipei, Taiwan
| | - S S Wang
- Department of Cardiovascular Surgery, National Taiwan University Hospital, Taipei, Taiwan.
| | - F Jin Shih
- National Yang-Ming University, and Institute of Clinical and Community Health Nursing, Chayi, Taiwan; Department of Medical Research, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chayi, Taiwan.
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Tseng PH, Shih FJ, Yang FC, Shih FJ, Wang SS. Factors contributing to poor sleep quality as perceived by heart transplant recipients in Taiwan. Transplant Proc 2014; 46:903-6. [PMID: 24767377 DOI: 10.1016/j.transproceed.2013.12.046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 12/09/2013] [Accepted: 12/16/2013] [Indexed: 11/19/2022]
Abstract
BACKGROUND The aims of this project were to explore the factors contributing to poor sleep quality at 1 to 3 years after heart transplantation (post-HT), and to explore economic problems and social support for HT recipients (HTRs). METHODS This study used a cross-sectional retrospective triangulation approach combining qualitative and quantitative research method designs. Quantitative data included data from the visual analog scale and the Taiwanese version of the World Health Organization Quality of Life questionnaire. Qualitative data were derived from questions that explored physiological, psychological, and economic factors contributing to poor sleep quality postprocedure for HTRs. RESULTS Sixty-four subjects (81% male, 19% female) participated in this research. Their ages ranged from 20 to 70 (M = 46.88 ± 12.12) years old. Their post-HT timeframe ranged from 1 to 4.10 years; 33% received preoperative extracorporeal membrane oxygenation support. Sleeping disturbances were reported by 72.7% of subjects after HT. Poor sleeping quality at 2 to 3 years post-HT (P = .028) was a complaint, and was worse than at 1 to 2 years post-HT (P = .008). Six physiological (62.5%) and 3 psychological (37.5%) contributing factors were further identified in qualitative interviews. Physiological factors were the major causes affecting their sleep quality 2 to 3 years after HT, whereas psychological factors arose from various family roles, responsibilities, and economic-related pressures. CONCLUSIONS Medical teams should find the causes that lead to sleep disturbances and use the findings to improve HTR sleep quality. When the family financial status is affected, these teams should offer assistance and suggestions for patients who are unable to work due to post-HT physical decline. Establishing and providing good family support systems or patient support groups may allow patients to obtain physical, psychological, and spiritual comfort.
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Affiliation(s)
- P H Tseng
- Department of Nursing, National Taiwan University Hospital, Taipei, Taiwan
| | - F Jong Shih
- Department of Gerontological Care and Management, Chang Gung University of Science and Technology, Taoyuan, Taiwan
| | - F C Yang
- Department of Nursing, Central Taiwan University of Science and Technology, Taichung, Taiwan
| | - F Jin Shih
- National Yang-Ming University, Institute of Clinical and Community Health Nursing, Taipei, and Chayi Christian Hospital, Chayi, Taiwan.
| | - S S Wang
- Department of Cardiovascular Surgery, National Taiwan University Hospital, Taipei, Taiwan.
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Wu RH, Tsai MJ, Ho KS, Wei TE, Hsieh TH, Han YK, Kuo CW, Tseng PH, Wang YZ. Sulfonated polyaniline nanofiber as Pt-catalyst conducting support for proton exchange membrane fuel cell. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.02.066] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Shen SY, Wu YJ, Ho KS, Hsieh TH, Ho TH, Wang YZ, Tseng PH, Hsu YC. Branched and curved nanotubular polyaniline synthesized by emulsion polymerization in presence of zinc salts of n-dodecylbenzenesulfonic acid. POLYMER 2011. [DOI: 10.1016/j.polymer.2011.04.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lee CT, Chang CY, Lee YC, Tai CM, Wang WL, Tseng PH, Hwang JC, Hwang TZ, Wang CC, Lin JT. Narrow-band imaging with magnifying endoscopy for the screening of esophageal cancer in patients with primary head and neck cancers. Endoscopy 2010; 42:613-9. [PMID: 20669074 DOI: 10.1055/s-0030-1255514] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND STUDY AIM Although narrow-band imaging (NBI) in endoscopy can improve detection of early-stage esophageal malignancies in patients with head and neck cancers, false-positive results may be obtained in areas with nonspecific inflammatory changes. This study evaluated the feasibility of primary screening with NBI and magnification for the presence of esophageal malignancies in these cancer patients. PATIENTS AND METHODS Sixty-nine patients with documented head and neck cancers were enrolled from April 2008 to January 2009. All patients underwent a meticulous endoscopic examination of the esophagus using a conventional white-light system followed by re-examination using the NBI system and final confirmation with NBI plus magnification. RESULTS Twenty-one patients (30.4 %) were confirmed to have esophageal neoplasia. Among these 21, 16 (76.2 %) had synchronous lesions, 9 (42.9 %) were asymptomatic, and 10 (47.6 %) had early-stage neoplasia. The incidence of multiple esophageal neoplasia was 57.1 %. NBI was more effective than conventional endoscopy in detecting neoplastic lesions (35 lesions in 21 patients vs. 22 lesions in 18 patients) and was particularly effective in patients with dysplasia (13 lesions in 9 patients vs. 3 lesions in 3 patients). The sensitivity and accuracy of detection were 62.9 % and 64.4 % for conventional endoscopy, 100 % and 86.7 % for NBI alone, and 100 % and 95.6 % for NBI with high magnification, respectively. CONCLUSIONS Compared with current approaches, NBI followed by high magnification significantly increases the accuracy of detection of esophageal neoplasia in patients with head and neck cancers. The result warrants conducting prospective randomized controlled study to confirm its efficacy.
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Affiliation(s)
- C T Lee
- Department of Internal Medicine, E-Da Hospital/I-Shou University, Kaohsiung, Taiwan
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Hsieh BZ, Chuang HY, Chao L, Li YJ, Huang YJ, Tseng PH, Hsieh TH, Ho KS. Formation mechanism of a nanotubular polyanilines prepared by an emulsion polymerization without organic solvent. POLYMER 2008. [DOI: 10.1016/j.polymer.2008.07.008] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Hsieh BZ, Chuang HY, Chao L, Huang YJ, Tseng PH, Hsieh TH, Han YK, Ho KS. Degradation induced variation of LC transition of poly(n-undecyl isocyanate). Polym Degrad Stab 2008. [DOI: 10.1016/j.polymdegradstab.2008.01.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Chao L, Han YK, Hiseh BZ, Huang YJ, Hsieh TH, Lin CM, Lin SZ, Tseng PH, Ho KS. Conducting polymer blends prepared from polyaniline withn-dodecylbenzenesulfonic acid zinc salt as the secondary dopant. J Appl Polym Sci 2008. [DOI: 10.1002/app.27990] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Abstract
The antifreeze glycoproteins (AFGPs) 1 are composed of a repeating tripeptide unit (Ala-Thr-Ala) in which the threonine residue is glycosylated with the disaccharide beta-D-Gal-(1-->3)-alpha-D-GalNAc. A new procedure for synthesizing AFGPs using Fmoc-(Ac4-beta-D-Gal-(1-->3)-benzylidene- alpha-D-GalNAc)Thr-OH (10) as a building block has been developed. Total synthesis of the AFGPs (n = 4, 8) in overall yields of 61% and 33 %, respectively, has demonstrated the usefulness of the method. The synthetic AFGPs 1 (n = 4, 8) showed a similar conformation to the native AFGPs in their circular dichroism spectra.
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Affiliation(s)
- P H Tseng
- Institute of Biological Chemistry, Academia Sinica, Nankang, Taipei, Taiwan
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