Publications

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Journal Article
Qorbani, M, Chou T-chin, Lee Y-H, Samireddi S, Naseri N, Ganguly A, Esfandiar A, Wang C-H, Chen L-C, Chen K-H, Moshfegh AZ.  2017.  Multi-porous Co3O4 nanoflakes @ sponge-like few-layer partially reduced graphene oxide hybrids: towards highly stable asymmetric supercapacitors. Journal of Materials Chemistry A. 5:12569-12577.
Lin, CH, Chen RS, Lin YK, Wang SB, Chen LC, Chen KH, Wen MC, Chou MMC, Chang L.  2017.  Photoconduction properties and anomalous power-dependent quantum efficiency in non-polar ZnO epitaxial films grown by chemical vapor deposition. APPLIED PHYSICS LETTERS . 110:052101.
Huang, H-C, Chang S-T, Hsu H-C, Du H-Y, Wang C-H, Chen L-C, Chen K-H.  2017.  Pyrolysis of Iron–Vitamin B9 As a Potential Nonprecious Metal Electrocatalyst for Oxygen Reduction Reaction. Search Results ACS Sustainable Chemistry & Engineering. 5 (4):2897–2905.
Lee, S-W, Chen J-C, Wu J-A, Chen K-H.  2017.  Synthesis and Properties of Poly(ether sulfone)s with Clustered Sulfonic Groups for PEMFC Applications under Various Relative Humidity. ACS Appl. Mater. Interfaces. 9(11):9805–9814.
Lee, C-P, Chen W-F, Billo T, Lin Y-G, Fu F-Y, Samireddi S, Lee C-H, Hwang J-S, Chen K-H, Chen L-C.  2016.  Beaded stream-like CoSe2 nanoneedle array for efficient hydrogen evolution electrocatalysis, 2016. Journal of Materials Chemistry A. 4(12):4553-4561.: The Royal Society of Chemistry AbstractWebsite

The development of earth-abundant and efficient electrocatalysts for the hydrogen evolution reaction (HER) is one of the keys to success for future green energy systems using hydrogen fuel. Nanostructuring of electrocatalysts is a promising way to enhance their electrocatalytic performance in the HER. In this study, pure pyrite-type beaded stream-like cobalt diselenide (CoSe2) nanoneedles are directly formed on flexible titanium foils through treating a cobalt oxide (Co3O4) nanoneedle array template with selenium vapor. The beaded stream-like CoSe2 nanoneedle electrode can drive the HER at a current density of 20 mA cm−2 with a small overpotential of 125 mV. Moreover, the beaded stream-like CoSe2 nanoneedle electrode remains stable in an acidic electrolyte for 3000 cycles and continuously splits water over a period of 18 hours. The enhanced electrochemical activity is facilitated by the unique three-dimensional hierarchical structure, the highly accessible surface active sites, the improved charge transfer kinetics and the highly attractive force between water and the surface of the nanoneedles that exceeds the surface tension of water.

Tran Nguyen, NH, Nguyen TH, Liu Y-ren, Aminzare M, Pham ATT, Cho S, Wong DP, Chen K-H, Seetawan T, Pham NK, Ta HKT, Tran VC, Phan TB.  2016.  Thermoelectric Properties of Indium and Gallium Dually Doped ZnO Thin Films, 2016. ACS Applied Materials & InterfacesACS Applied Materials & Interfaces. 8(49):33916-33923.: American Chemical Society AbstractWebsite
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Lin, Y-K, Chen R-S, Chou T-chin, Lee Y-H, Chen Y-F, Chen K-H, Chen L-C.  2016.  Thickness-Dependent Binding Energy Shift in Few-Layer MoS2 Grown by Chemical Vapor Deposition, 2016. ACS Applied Materials & InterfacesACS Applied Materials & Interfaces. 8(34):22637-22646.: American Chemical Society AbstractWebsite
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Lee, CP, Chen* WF, Billo T, Lin YG, Fu FY, Samireddi S, Lee CH, Hwang JS, Chen* LC, Chen* KH.  2016.  Beaded-stream-like CoSe2 nanoneedles array for efficient hydrogen evolution electrocatalysis. J. Mater. Chem. A . 4 :4553-4561.
Wei-ChaoChen, Cheng-YingChen, Tunuguntla V, HungLu S, ChaochinSu, Lee C-H, Chen K-H, Chen L-C.  2016.  Enhanced solar cell performance of Cu2ZnSn(S,Se)4 thin films through structural control by using multi-metallic stacked nanolayers and fast ramping process for sulfo-selenization. Nano Energy. 30:762-770.
Wong, DP, Huang CY, Chien WL, Chang CE, Ganguly A, Lyu LM, Hwang JS, Chen LC, Chen KH.  2016.  Enhanced thermoelectric performance in percolated bismuth sulfide composite. RSC Advances . 6:98952.
Chen, WC, Tunuguntla V, Li HW, Chen CY, Li SS, Hwang JS, Lee CH, Chen LC, Chen KH.  2016.  Fabrication of Cu2ZnSnSe4 solar cells through multi-step selenization of layered metallic precursor film. Thin Solid Films .
Chen, IN, Chong CW, Lyu LM, Wong DP, Chien WL, Anbu A, Chen YF, Chen LC, Chen KH.  2016.  Improving the thermoelectric performance of metastable rock-salt GeTe-rich Ge-Sb-Te thin films through tuning of grain orientation and vacancies. Physica Status Solidi A . :1-8.
Wang, B-Y, Wang HT, Chen L-Y, Hsueh HC, Chiou JW, Wang W-H, Wang PH, Chen K-H, Chen Y-C, Chen L-C, Chen C-H, Pong WF, Wang J, Guo J-H.  2016.  Nonlinear opening of the band gap of BN-co-doped graphene. Carbon.
Myers, J, Mou* S, Chen KH, Zhuang Y.  2016.  Scanning microwave microscope imaging of micro-patterned monolayer graphene grown by chemical vapor deposition. Applied Physics Letters . 108:053101.
Shown, I, Ganguly A, Chen L-C, Chen K-H.  2015.  Conducting polymer-based flexible supercapacitor, 2015. Energy Science & EngineeringEnergy Science & Engineering. 3(1):2-26.: John Wiley & Sons, Ltd AbstractWebsite

Abstract Flexible supercapacitors, a state-of-the-art material, have emerged with the potential to enable major advances in for cutting-edge electronic applications. Flexible supercapacitors are governed by the fundamentals standard for the conventional capacitors but provide high flexibility, high charge storage and low resistance of electro active materials to achieve high capacitance performance. Conducting polymers (CPs) are among the most potential pseudocapacitor materials for the foundation of flexible supercapacitors, motivating the existing energy storage devices toward the future advanced flexible electronic applications due to their high redox active-specific capacitance and inherent elastic polymeric nature. This review focuses on different types of CPs-based supercapacitor, the relevant fabrication methods and designing concepts. It describes recent developments and remaining challenges in this field, and its impact on the future direction of flexible supercapacitor materials and relevant device fabrications.

Chen*, RS, Tsai HY, Chan CH, Huang YS, Chen YT, Chen KH, Chen LC.  2015.  Comparison of CVD- and MBE-grown GaN nanowires: crystallinity, photoluminescence, and photoconductivity. J. Electronic Mater. . 44 :177.
Huang, YF, Jen YJ, Chen LC, Chen KH, Chattopadhyay S.  2015.  Design for approaching cicada-wing reflectance in low and high index biomimetic nanostructures. ACS Nano . 9:301-311.
Nataraj, SK, Wang CH, Huang HC, Du HY, Chen LC, Chen KH.  2015.  Functionalizing biomaterials to be an efficient proton-exchange membrane and methanol barrier for DMFCs. ACS Sustainable Chemistry & Engineering . 3:302.
Han, HC, Lo HC, Wu CY, Chen KH, Chen LC, Ou KL, Hosseinkhani* H.  2015.  Nano-textured Fluidic Biochip as Biological Filter for Selective Survival of Neuronal Cells. J. Biomed. Mater. Res. A . 103:2015.
Du, HY, Yang CS, Hsu H-C, Huang HC, Chang ST, Wang C-H, Chen J-C, Chen KH, Chen LC.  2015.  Pulsed electrochemical deposition of Pt NPs on polybenzimidazole-CNT hybrid electrode for high-temperature proton exchange membrane fuel cells. International Journal of Hydrogen Energy. 40:14398.
Wong, DP, Suriyaprabha R, Yuvakumar R, Rajendran V, Chen YT, Hwang BJ, Chen LC, Chen KH.  2014.  Binder-free rice husk-based silicon-graphene composite as energy efficient Li-ion battery anodes. J. Mater. Chem. A. 2:13437-13441.
Huang, LW, Chang CK, Chien FC, Chen KH, Chen P, Chen FR, Chang CS.  2014.  Characterization of the cleaning process on a transferred graphene. J. Vac. Sci. Tech. A . 32:050601.
Lien, HT, Wong DP, Tsao NH, Huang CI, Su C, Chen KH, Chen LC.  2014.  Effect of copper oxide oxidation state on the polymer-based solar cell buffer layers. ACS Appl. Mater. & Inter. .
Lin, YG, Chen YC, Miller JT, Chen LC, Chen KH, Hsu YK.  2014.  Hierarchically porous Ca-containing MnO2 nanorod bundles with superior photoelectrochemical activity. ChemCatChem . 6:1684.
Du, HY, Wang CH, Yang CS, Hsu HC, Chang ST, Huang HC, Lai SW, Chen JC, Yu LT, Chen LC, Chen KH.  2014.  A high performance polybenzimidazole-CNT hybrid electrode for high-temperature proton exchange membrane fuel cells. J. of Mater. Chem. . 2:7015-7019.