Electrons in nanostructures

Awan, Tahir Iqbal; Bashir, Almas; Tehseen, Aqsa; Bibi, Saliha

doi:10.1016/b978-0-12-818908-5.00007-x

Cited by 2 publications

(2 citation statements)

References 24 publications

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“…Electrons from the surfaces of metals or semiconductors can only be knocked off when an external force supplies additional energy [ 72 ]. This extra energy can be produced using a variety of methods, including thermal processes, energy storage in an electric field, using the kinetic energy of charges, or light energy.…”

Section: Resultsmentioning

confidence: 99%

Field Emission Properties of Cu-Filled Vertically Aligned Carbon Nanotubes Grown Directly on Thin Cu Foils

Nwanno,

Thapa,

Watt

et al. 2024

Nanomaterials

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Copper-filled vertically aligned carbon nanotubes (Cu@VACNTs) were grown directly on Cu foil substrates of 0.1 mm thicknesses at different temperatures via plasma-enhanced chemical vapor deposition (PECVD). By circumventing the need for additional catalyst layers or intensive substrate treatments, our in-situ technique offers a simplified and potentially scalable route for fabricating Cu@VACNTs with enhanced electrical and thermal properties on thin Cu foils. Comprehensive analysis using field emission scanning microscopy (FESEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS) mappings, and X-ray diffraction (XRD) revealed uniform Cu filling within the VACNTs across a range of synthesis temperatures (650 °C, 700 °C, and 760 °C). Field emission (FE) measurements of the sample synthesized at 700 °C (S700) showed low turn-on and threshold fields of 2.33 V/μm and 3.29 V/μm, respectively. The findings demonstrate the viability of thin Cu substrates in creating dense and highly conductive Cu-filled VACNT arrays for advanced electronic and nanoelectronics applications.

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Section: Resultsmentioning

confidence: 99%

Field Emission Properties of Cu-Filled Vertically Aligned Carbon Nanotubes Grown Directly on Thin Cu Foils

Nwanno,

Thapa,

Watt

et al. 2024

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…Two key upgrades for the comprehensive diagnostics of UHDR beams can be highlighted in the proposed prototype: (i) measuring the pulse duration to evaluate the instantaneous dose-rate of each pulse, and (ii) validating the instrument with commercial dosimeters (e.g., the PTW-microDiamond). Nevertheless, all-carbon detectors based on diamond samples [33] , [34] , [35] , with sputter-deposited or laser-induced graphitic contacts better fulfill the tissue equivalence requirement for radiotherapy dosimetry and would offer a valuable alternative to eliminate the possible spurious signals induced by secondary electrons emitted by metallic contacts [36] . Furthermore, we would like to emphasize that the implemented measurement method may mitigate the detrimental effects of non-linear conduction mechanisms induced by structural defects distributed within the active volume of the detectors [37] , as expected for laser-processed diamond samples [34] , [38] .…”

Section: Discussionmentioning

confidence: 99%