International Journal of Extreme Manufacturing, Volume. 2, Issue 1, 15401(2020)

Periodic energy decomposition analysis for electronic transport studies as a tool for atomic scale device manufacturing

Paven Thomas Mathew1 and Fengzhou Fang1,2、*
Author Affiliations
  • 1Centre of Micro/Nano Manufacturing Technology, MNMT-Dublin, University College Dublin, Ireland
  • 2State Key Laboratory of Precision Measuring Technology and Instruments, Centre of Micro/Nano
  • show less

    Atomic scale manufacturing is a necessity of the future to develop atomic scale devices with high precision. A different perspective of the quantum realm, which includes the tunnelling effect, leakage current at the atomic-scale, Coulomb blockade and Kondo effect, is inevitable for the fabrication and hence, the mass production of these devices. For these atomic-scale device development, molecular level devices must be fabricated. Proper theoretical studies could be an aid towards the experimental realities. Electronic transport studies are the basis to realise and interpret the problems happening at this minute scale. Keeping these in mind, we present a periodic energy decomposition analysis (pEDA) of two potential candidates for moletronics: phthalocyanines and porphyrins, by placing them over gold substrate cleaved at the (111) plane to study the adsorption and interaction at the interface and then, to study their application as a channel between two electrodes, thereby, providing a link between pEDA and electronic transport studies. pEDA provides information regarding the bond strength and the contribution of electrostatic energy, Pauli’s energy, orbital energy and the orbital interactions. Combining this analysis with electronic transport studies can provide novel directions for atomic/close-toatomic- scale manufacturing (ACSM). Literature survey shows that this is the first work which establishes a link between pEDA and electronic transport studies and a detailed pEDA study on the above stated molecules. The results show that among the molecules studied, porphyrins are more adsorbable over gold substrate and conducting across a molecular junction than phthalocyanines, even though both molecules show a similarity in adsorption and conduction when a terminal thiol linker is attached. A further observation establishes the importance of attractive terms, which includes interaction, orbital and electrostatic energies, in correlating the pEDA study with the transport properties. By progressing this research, further developments could be possible in atomic-scale manufacturing in the future.

    Tools

    Get Citation

    Copy Citation Text

    Paven Thomas Mathew, Fengzhou Fang. Periodic energy decomposition analysis for electronic transport studies as a tool for atomic scale device manufacturing[J]. International Journal of Extreme Manufacturing, 2020, 2(1): 15401

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Received: Aug. 4, 2019

    Accepted: --

    Published Online: Jun. 4, 2020

    The Author Email: Fang Fengzhou (fengzhou.fang@ucd.ie)

    DOI:10.1088/2631-7990/ab5d8a

    Topics

    Please enter the answer below before you can view the full text.
    5+5=
    Submit