A5013566132- Carbon Nanotubes in Composites
- Graphene research and applications
- Enzyme-mediated dye degradation
- Biochemical and biochemical processes
- Biofuel production and bioconversion
- Gyrotron and Vacuum Electronics Research
- Radiation Effects in Electronics
- Lignin and Wood Chemistry
- Mass Spectrometry Techniques and Applications
- Diamond and Carbon-based Materials Research
- Quantum and electron transport phenomena
- Molecular Junctions and Nanostructures
- Microbial Metabolic Engineering and Bioproduction
- Advanced Electron Microscopy Techniques and Applications
- Nanowire Synthesis and Applications
- Thermal Radiation and Cooling Technologies
- Mechanical and Optical Resonators
- Nanotechnology research and applications
- Fiber-reinforced polymer composites
- Silicon Nanostructures and Photoluminescence
- Nanomaterials and Printing Technologies
- Photocathodes and Microchannel Plates
- Microbial Metabolism and Applications
- Nanofabrication and Lithography Techniques
- Semiconductor materials and devices
Kyoto University
2023-2024
Aixtron (United Kingdom)
2010-2023
Universiti Tunku Abdul Rahman
2019
University of Cambridge
2004-2011
Massachusetts Institute of Technology
2007
University of Victoria
2000
Australian National University
1977
The University of Queensland
1977
Monash University
1977
The University of Western Australia
1977
Rice straw (RS), an agricultural residue rich in carbohydrates, has substantial potential for bioethanol production. However, the presence of lignin impedes access to these hindering efficient carbohydrate-to-bioethanol conversion. Here, we expressed versatile peroxidase (VP), a lignin-degrading enzyme, Pichia pastoris and used it delignify RS at 30 °C using membrane bioreactor that continuously discarded degraded lignin. Klason analysis revealed VP-treatment led 35% delignification RS. We...
Manganese peroxidase (MnP) has been well studied for woody biomass degradation. MnP exhibits a biotechnological potential producing lignin-based materials through Kraft lignin (KL) polymerization. derived from Ceriporiopsis subvermispora (CsMnP) is particularly intriguing as this fungus predominantly utilizes to degrade/modify lignin. Here, we investigated CsMnP's catalytic activity toward the phenolic β-O-4′ substructure, utilizing guaiacylglycerol-β-guaiacyl ether (GGE) model substrate....
Bacteria and fungi utilize carbohydrate-active enzymes, such as feruloyl esterases (FAEs), to degrade lignocellulosic biomass. FAEs in subfamily 5 (SF5) of carbohydrate esterase family 1 target larger substrates, making them particularly interesting. However, their mechanisms are not well understood due limited structural information. This study presents the first structure catalytic domain (CD) an SF5 FAE from Acremonium alcalophilum (AaFaeD), both free a complex with ferulic acid (FA). FA...
Herein we present an inexpensive facile wet‐chemistry‐free approach to the transfer of chemical vapour‐deposited multiwalled carbon nanotubes flexible transparent polymer substrates in a single‐step process. By controlling nanotube length, demonstrate accurate control over electrical conductivity and optical transparency transferred thin films. Uniaxial strains up 140% induced only minor reductions sample conductivity, opening number applications stretchable electronics. Nanotube alignment...
We report a gas ionizer based on arrays of microfabricated double-gated isolated vertically aligned carbon nanofibers (VA-CNFs) for application in low-power portable mass spectrometers. Field-emitted electrons from VA-CNFs are accelerated to high energy and subsequently collide with neutral molecules, leading ionization/fragmentation the molecules. Double-gated field-emitter VA-CNF tips were fabricated using photoresist planarization technique. Two types devices characterized. The first type...
A study highlighting the benefits associated with continuous separation of MnP- (or LiP-) depolymerized lignin fragments from reaction medium using a membrane bioreactor.
We report micro-fabricated double-gated vertically aligned carbon nanofiber (CNF) arrays for ionization of gasses in low power portable mass spectrometers. The devices can be operated one two modes - electron impact (EII ) or field (FI). When as ionizer, dissipation was reduced from >1 W typical thermionic emission based ionizers to <100 mW. a the turn-on voltage is 5-10 kV ungated 350 V.
Polaritons in layered materials (LMs) are a promising platform to manipulate and control light at the nanometer scale. Thus, observation of polaritons wafer-scale LMs is critically important for development industrially relevant nanophotonics optoelectronics applications. In this work, phonon (PhPs) multilayer hexagonal boron nitride (hBN) grown by chemical vapor deposition reported. By infrared nanoimaging, PhPs visualized, PhP lifetimes ≈0.6 ps measured, comparable that micromechanically...
The joining of macroscopic films vertically aligned multiwalled carbon nanotubes (CNTs) to titanium substrates is demonstrated by active vacuum brazing at 820 °C with a Ag-Cu-Ti alloy and 880 Cu-Sn-Ti-Zr alloy. methodology was elaborated in order enable the production highly electrically thermally conductive CNT/metal substrate contacts. interfacial electrical resistances joints were measured be as low 0.35
We investigate, by combining physical and electrical measurements together with an atomistic-to-circuit modeling approach, the conductance of doped carbon nanotubes (CNTs) their eligibility as possible candidate for next generation back-end-of-line (BEOL) interconnects. Ab-initio simulations predict a doping-related shift Fermi level, which reduces shell chirality variability improves up to 90% converting semiconducting shells metallic. Circuit-level 88% signal delay improvement vs. pristine...
Conversion of microalgae biomass to bioethanol is actively being researched establish a cost effective and sustainable production technology. The main challenge break down the carbohydrates content in obtain fermentable sugar for subsequent fermentation process. This study focuses on effectiveness usage phosphoric acid pretreatment capability Saccharomyces diastaticus as microbe produce ethanol. Scenedesmus dimorphus was used feedstock due its high carbohydrate content. Mild hydrolysis at...
In this work, we designed and fabricated two types of double-gated isolated vertically aligned carbon nanofiber field emission arrays (VACNF FEAs) to study how the tip position relative gate affects device performance. first type, is in-plane with gate, in second 0.9 mum below gate. To quantify effectiveness gates affect total current, factor (beta <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">G</sub> ) focus...
For devices such as next generation x-ray radiography equipment, a small spot along with fast switching is desired to obtain high resolution images. Since the intensity of radiation proportional emission current hitting anode, combined focal electron for spatial resolution. To minimize motion-induced blurring images moving organs heart, temporal which in turns depends on time sources. This combination and renders conventional hot cathode less suitable due its non-Gaussian beam slow response...
Cold cathodes based on carbon nanotubes (CNs) allow to produce a pulsed/directly modulated electron beam. Using an array of vertically aligned CNs that exhibit aspect ratio around 200, we demonstrated the modulation 1.5 A/cm/sup 2/ beam at GHz frequency. Such CN are very promising for their use in new generation compact and low cost microwave amplifiers operates between 30 100 GHz.
Carbon nanotubes are grown, as opposed to being lithographically defined, with diameters between 1.3 - 100 nm and lengths of a few micrometers. They have the 'natural' geometry required for field emission. The challenge is develop technology which allows CNTs be incorporated into emission cathode back plane together gating contact structures.
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This paper presents the fabrication and characterization of carbon nanotubes cold cathodes their improvement to photocathodes by adding p-i-n photodiodes in device structure. Integration operation based prototype dual x-ray tube is presented.
An abstract is not available for this content so a preview has been provided. As you have access to content, full PDF via the ‘Save PDF’ action button.
An abstract is not available for this content so a preview has been provided. As you have access to content, full PDF via the ‘Save PDF’ action button.