Towards Ge-based electronic devices: Increased longevity of alkanethiol-passivated Ge(100) in low humidity environments

Coverage Dependent Structural Change in Tetrahydrothiophene Adsorbed on Ge(100) Surface

“…The functionalization of group IV (100) semiconductor surfaces with organic molecules has attracted considerable attention because organic-functionalized semiconductors formed by surface chemical reactions can be applied in various devices, such as sensors and electronic devices. − To tailor the properties of (100) semiconductor surfaces through the covalent bonding of organic molecules, it is necessary to understand the adsorption reactions of organic molecules on semiconductor surfaces and their associated mechanisms. − Organic molecules with sulfur, oxygen, or nitrogen atoms are frequently used to functionalize semiconductor surfaces to achieve desired properties such as passivation, layer growth, and organic thin film growth. − In particular, sulfur-based molecules are known to be outstanding passivators on semiconductor surfaces. ,,− Tetrahydrothiophene is a five-membered heterocyclic molecule containing a sulfur atom that is commonly used as a catalyst in the hydrodesulfurization process. − Although several studies have investigated the adsorption behavior of tetrahydrothiophene on Au(111) and Pt(100) metal surfaces, , its adsorption on a semiconductor surface has not yet been reported. Because the adsorption of a molecule on a metal surface is generally different from that on a semiconductor surface, the adsorption of tetrahydrothiophene on (100) semiconductor surfaces should be investigated to understand its adsorption structure and the related reaction pathway.…”

Investigating Chain‐Like Core‐Shell Ge Nanowires Coated with Carbon Nanotubes Through Atomic Simulations: Implication for Improving Binding and Mechanical Properties

“…Besides, the nanowires are sensitive to oxygen and water vapor in lithiumion batteries, resulting in degradation of the nanodevice performance. [12][13][14] Consequently, a robust or self-adapted constraint is required to confine Ge nanowires as anode structures, including coating the Ge nanowires with organic monolayer such as those based on alkanethiols [15,16] or alkyl groups, [17] or with a protective shell of carbon nanotubes (CNTs). [18,19] In these coating materials, CNTs have hollow and cage-like structures with a closed topological configuration, where carbon atoms in the nanotubes can form strong covalent bonds through sp 2 hybridization, resulting in high mechanical strength.…”