Macroscopic Behavior and Microscopic Factors of Electron Emission from Chained Nanocarbon Coatings

Daleri Boqizoda,Anatoly Slesarev,Daria Osheva,Tatiana Kitayeva,Anatoly Zatsepin,Evgeny Buntov

doi:10.3390/c5030055

Abstract

The carbyne-containing films based on linear-chain carbon are promising materials for the manufacture of electronic equipment components. These carbyne-containing materials can be used as active elements of computational electronics and as ultra-miniature sensors of gaseous environment. The temperature studies of the electrical characteristics of carbyne-containing films by most of the scientific groups are limited to the low temperature range in which the quantum properties of nanostructures are most pronounced. We studied carbyne-containing films with a thickness of 20 and 400 nm on copper and silicon substrates using optically stimulated electron emission (OSEE) in the temperature range from room temperature (RT) to 400 °C. Theoretical modeling explains the dependence of work function on termination groups and substrate lattice. Experimental data revealed a relationship between the spectral characteristics of electron emission and temperature. The spectral contributions of both surface states and bulk interband transitions were clearly distinguishable.

Highlights

Carbon materials have formed an interesting area of materials science research in recent decades.Of particular interest are the low-dimensional carbon modifications—nanodiamonds, graphene, fullerenes, and nanotubes
We studied carbyne-containing films with a thickness of 20 and 400 nm on copper and silicon substrates using optically stimulated electron emission (OSEE)
We use optically stimulated electron spectroscopy (OSEE) in combination with ab initio modeling, which allowed us to reveal the influence of temperature, thickness, and substrate type on the band structure and low vacuum photoemission threshold of linear-chained carbon

Summary

Introduction

Carbon materials have formed an interesting area of materials science research in recent decades. The information available on the surface layer of functional materials, amorphous, is incomplete and is usually obtained by numerical modeling techniques. We use optically stimulated electron spectroscopy (OSEE) in combination with ab initio modeling, which allowed us to reveal the influence of temperature, thickness, and substrate type on the band structure and low vacuum photoemission threshold of linear-chained carbon. We use optically stimulated electron spectroscopy (OSEE) in combination with ab which allowed us to reveal the influence of temperature, thickness, and substrate type on the band structure and low vacuum photoemission threshold of linear-chained carbon (LCC)containing coatings. The modeling aimed to interpret the emission properties on substrate type, while thermal issues were addressed experimentally.

Samples and Methods

Discussion

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Conclusions