0000000000513275

AUTHOR

L.d. Yu

showing 3 related works from this author

In-Situ atomic force microscopic observation of ion beam bombarded plant cell envelopes

2007

Abstract A program in ion beam bioengineering has been established at Chiang Mai University (CMU), Thailand, and ion beam induced transfer of plasmid DNA molecules into bacterial cells (Escherichia coli) has been demonstrated. However, a good understanding of the fundamental physical processes involved is lacking. In parallel work, onion skin cells have been bombarded with Ar+ ions at energy 25 keV and fluence1–2 × 1015 ions/cm2, revealing the formation of microcrater-like structures on the cell wall that could serve as channels for the transfer of large macromolecules into the cell interior. An in-situ atomic force microscope (AFM) system has been designed and installed in the CMU bio-impl…

In situNuclear and High Energy PhysicsIon beamAtomic force microscopyChemistryMoleculeNanotechnologyPlant cellInstrumentationMolecular physicsMicroscopic observationMacromoleculeIonNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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Development of economic MeV-ion microbeam technology at Chiang Mai University

2017

Abstract Developing high technologies but in economic manners is necessary and also feasible for developing countries. At Chiang Mai University, Thailand, we have developed MeV-ion microbeam technology based on a 1.7-MV Tandetron tandem accelerator with our limited resources in a cost-effective manner. Instead of using expensive and technically complex electrostatic or magnetic quadrupole focusing lens systems, we have developed cheap MeV-ion microbeams using programmed L-shaped blade aperture and capillary techniques for MeV ion beam lithography or writing and mapping. The programmed L-shaped blade micro-aperture system consists of a pair of L-shaped movable aperture pieces which are contr…

Nuclear and High Energy PhysicsMaterials scienceIon beamAperturemicrobeam02 engineering and technologyIon beam lithography01 natural scienceslaw.inventionOpticslaw0103 physical sciencesQuadrupole magnetInstrumentationLithography010302 applied physicsbusiness.industryta1182MicrobeamMeV ionL-shaped blade aperture021001 nanoscience & nanotechnologytapered glass capillaryComputer Science::OtherLens (optics)Physics::Accelerator Physicslithography0210 nano-technologybusinessBeam (structure)Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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Development of economic MeV-ion microbeam technology at Chiang Mai University

2017

Developing high technologies but in economic manners is necessary and also feasible for developing countries. At Chiang Mai University, Thailand, we have developed MeV-ion microbeam technology based on a 1.7-MV Tandetron tandem accelerator with our limited resources in a cost-effective manner. Instead of using expensive and technically complex electrostatic or magnetic quadrupole focusing lens systems, we have developed cheap MeV-ion microbeams using programmed L-shaped blade aperture and capillary techniques for MeV ion beam lithography or writing and mapping. The programmed L-shaped blade micro-aperture system consists of a pair of L-shaped movable aperture pieces which are controlled by …

microbeamPhysics::Accelerator PhysicsMeV ionL-shaped blade aperturelitografia (grafiikka)tapered glass capillaryComputer Science::Other
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