Browsing USN Open Archive by Author "Chen, Xuyuan"
Now showing items 1-20 of 27
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Bio-electro chemical process for power to gas application
Rabby, Md Fazle (Master thesis, 2023)Fossil fuels are non-renewable resources, so their scarcity will increase day by day. Extracting and using fossil fuels also have an impact on the environment. This challenge needs to be solved by developing sustainable ... -
Combination of micro-scanning mirrors and multi-mode fibers for speckle reduction in high lumen laser projector applications
Tong, Zhaomin; Shen, Wenjiang; Song, Shaohua; Cheng, Wenzhi; Cai, Zhuo; Ma, Yifei; Wei, Lei; Ma, Weiguang; Xiao, Liantuan; Jia, Suotang; Chen, Xuyuan (Peer reviewed; Journal article, 2017)In high lumen laser projectors, it is required to use laser diodes coupled to multi-mode fibers (MMFs) to obtain a high power illumination module. In this paper, we have fabricated an electromagnetic micro-scanning mirror ... -
Compact Packaging and Testing of Carbon Nanotubes (CNTs) Based Supercapacitors
Rifat, Rashid Ahmed (Master thesis, 2023)This study explored different compact packaging techniques and evaluated their impact on the performance of carbon nanotube (CNT)-based supercapacitors. The increasing demand for high-performance energy storage devices in ... -
Doping and etching processes of iCL – CNT for high energy density supercapacitors
Muhandiram, Diani Indrachapa (Master thesis, 2023)The purpose of this study is to investigate the defects resulting from the etching and N2 doping process which have the potential to increase the surface area of carbon nanotubes (CNTs), and consequently enhance the energy ... -
DRIE Si Nanowire Arrays Supported Nano-Carbon Film for Deriving High Specific Energy Supercapacitors On-Chip
Lu, Pai; Chen, Xuyuan; Øhlckers, Per; Halvorsen, Einar; Hoffmann, Martin; Müller, Lutz (Peer reviewed; Journal article, 2021)Supercapacitor is a promising solution to storage of pulsed energy generated by MEMS energy harvesting systems, relying on its faster charging/discharging capability than secondary battery. To improve the energy density ... -
Electrophoretic deposition of graphene-based materials: A review of materials and their applications
Ma, Yifei; Han, Jiemin; Wang, Mei; Chen, Xuyuan; Jia, Suotang (Journal article; Peer reviewed, 2018)Recently, graphene-based materials have been successfully fabricated by the electrophoretic deposition (EPD) technique and exhibited various extraordinary properties. Here, research progress of the field of graphene-based ... -
Fabrication of thick anodic films on 304-type stainless steel for binder-free supercapacitors
Wang, Yingge; Li, Gang; Wang, Kaiying; Chen, Xuyuan (Journal article, 2020)We report the fabrication of thick nanoporous oxide films on stainless steel (SS) foils via long-term constant-potential anodization at room temperature. The anodization potential of 50 V was employed for 1, 2 and 3 h, ... -
Facile synthesis of NFL-ZnWO4 for pseudocapacitor applications
Fan, Xiao; Chen, Xuyuan (Peer reviewed; Journal article, 2019)In this report, NFL-ZnWO4 was synthesized by a hydrothermal route and investigated for application in supercapacitors for the first time. The physical and chemical characterizations of the prepared nanomaterial were analyzed ... -
Graphene synthesized on porous silicon for active electrode material of supercapacitors
Su, Binbin; Chen, Xuyuan; Halvorsen, Einar (Journal article; Peer reviewed, 2016)We present graphene synthesized by chemical vapour deposition under atmospheric pressure on both porous nanostructures and flat wafers as electrode scaffolds for supercapacitors. A 3nm thin gold layer was deposited on ... -
Heterojunction engineering on TiO2 nanotubes electrodes and their applications
Du, Kang (Doctoral dissertations at the University of South-Eastern Norway;9, Doctoral thesis, 2018)Abstract With the dramatic progress in nanotechnology, TiO2 nanomaterials have shown blooming applications in the field of energy and environment since the discovery of water photolysis on a TiO2 electrode in 1972. In ... -
Hierarchical Porous Chitosan Sponges as Robust and Recyclable Adsorbents for Anionic Dye Adsorption
Wang, Mei; Ma, Yifei; Sun, Yan; Hong, Sung Yong; Lee, Stephanie K; Yoon, Bumyong; Chen, Long; Ci, Lijie; Nam, Jae-Do; Chen, Xuyuan; Suhr, Jonghwan (Journal article; Peer reviewed, 2017)Biomass waste treatment and detrimental dye adsorption are two of the crucial environmental issues nowadays. In this study, we investigate to simultaneously resolve the aforementioned issues by synthesizing chitosan sponges ... -
Laser Spatial Coherence Suppression With Refractive Optical Elements Toward the Improvement of Speckle Reduction by Light Pipes
Tong, Zhaomin; Sun, C; Ma, Y; Wang, M; Jia, S; Chen, Xuyuan (Peer reviewed; Journal article, 2019)We study laser speckle reduction by light pipes, and we propose a new method to improve its efficiency. Proof-of-concept refractive optical elements (ROEs) with a staircase-like structure are introduced before a holographic ... -
Microbial electrochemical approaches of carbon dioxide utilization for biogas upgrading
Aryal, Nabin; Zhang, Yifeng; Bajracharya, Suman; Pant, Deepak; Chen, Xuyuan (Peer reviewed; Journal article, 2021)Microbial electrochemical approach is an emerging technology for biogas upgrading through carbon dioxide (CO2) reduction and biomethane (or value-added products) production. There is limited literature critically reviewing ... -
Nano fabricated silicon nanorod array with titanium nitride coating for on-chip supercapacitors
Lu, Pai; Ohlckers, Per; Müller, Lutz; Leopold, Steffen; Hoffmann, Martin; Grigoras, Kestutis; Ahopelto, Jouni; Prunnila, Mika; Chen, Xuyuan (Journal article; Peer reviewed, 2016)We demonstrate high aspect ratio silicon nanorod arrays by cyclic deep reactive ion etching (DRIE) process as a scaffold to enhance the energy density of a Si-based supercapacitor. By unique atomic layer deposition (ALD) ... -
Nanoscale hetero-structured Co-Co(OH)2 composite/amorphous carbon core/shell bi-functional electrocatalysts electrochemically evolved from metastable hexagonal-phase cobalt for overall water splitting
Lu, Pai; Chen, Xuyuan (Peer reviewed; Journal article, 2021)Bi-functional electrocatalysts suited to alkaline water splitting systems are highly pursued, towards the most realistic application enabled by simplified electrolyzer design and cost-effective operation. Herein, a novel ... -
Nonsequential Speckle Reduction Method by Generating Uncorrelated Laser Subbeams with Equivalent Intensity Using a Reflective Spatial Light Modulator
Tong, Zhaomin; Song, Shaohua; Jia, Suotang; Chen, Xuyuan (Journal article; Peer reviewed, 2017)Sequential speckle reduction methods demand the usage of fast modulators due to the short integration period of human eyes. Here, a nonsequential speckle reduction method by splitting one laser beam with short coherence ... -
On-chip supercapacitor electrode based on polypyrrole deposited into nanoporous Au scaffold
Lu, Pai; Øhlckers, Per; Chen, Xuyuan (Journal article; Peer reviewed, 2016)On-chip supercapacitors hold the potential promise for serving as the energy storage units in integrated circuit system, due to their much higher energy density in comparison with conventional dielectric capacitors, high ... -
Optimized growth of iCL-CNT on a microstructured Al substrate for high energy density supercapacitors
Farook, Tasfia Nowshin (Master thesis, 2023)This study presents the synthesis of millimeter-tall interconnected cross-linked carbon nanotubes (iCL-CNTs) with high specific capacitance, grown directly on pre-etched Aluminium (Al) substrates. Atmospheric pressure ... -
Optimized Microstructure Al Substrate for iCL-CNT Growth for High Energy Density Supercapacitors
Shabbir, Javeria (Master thesis, 2023)The thesis study investigates the effect of Al surface morphology on the growth of inter-connected cross-linked carbon nanotubes for high-energy-density supercapacitors. This study aims to improve the electrochemical ... -
Optimized Ni Nanoparticle Deposition for iCL-CNT Growth for High Energy Density Supercapacitors
Ahmed, Hamza (Master thesis, 2023)This thesis investigates the effect of different sputter deposition parameters on the diameter, morphology, and distribution of nickel nanoparticles, and the consequently synthesized interconnected cross-linked carbon ...