Title

Work Function Control of Germanium through Carborane-Carboxylic Acid Surface Passivation

ACS Citation

Serino, A.C.; Anderson, M.E.; Heidenreich, L.; Dunn, B.S.; Spokoyne, A.M.; Weiss, P.S. Work Function Control of Germanium Through Carboxyl-Carborane Surface Passivation. ACS Appl. Mater. Interfaces.2017,9, 34592-34596.

Abstract

Self-assembled monolayers (SAMs) of carborane isomers with different dipole moments passivate germanium to modulate surface work function while maintaining chemical environment and surface energy. To identify head groups capable of monolayer formation on germanium surfaces, we studied thiol-, hydroxyl-, and carboxyl-terminated carboranes. These films were successfully formed with carboxylic acid head groups instead of the archetypal thiol, suggesting that the carborane cluster significantly affects headgroup reactivity. Film characterization included X-ray and ultraviolet photoelectron spectroscopies as well as contact angle goniometry. Using these carboranes, the germanium surface work function was tailored over 0.4 eV without significant changes to wetting properties.

Source Name

Applied Materials & Interfaces

Publication Date

9-18-2017

Volume

9

Issue

40

Page(s)

34592-34596

Document Type

Citation

Citation Type

Article

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