The polymerization of 1,4-diethynylbenzene was studied on a Cu(111) surface using scanning tunneling microscopy (STM) under ultra-high vacuum conditions. Thermal activation yielded disordered covalent networks, where distinct basic structural motifs indicate different coupling reactions.

Abstract The phenomenal strides in the modifications and use of supplementary cementitious materials conjunction with superplasticizers discrete fiber distributions concrete made it possible to arrive at structural material termed as “ultra-high performance concretes” (UHPC) or its extension reinforced (UHPFRC). Its development heralded a new era, opening vistas configurations forms that could ...

A comprehensive study of Schottky barrier MOSFET (SBMOSFET) scaling issue is performed to determine the role of wafer orientation and structural parameters on the performance of this device within Non-equilibrium Green's Function formalism. Quantum confinement increases the effective Schottky barrier height (SBH). (100) orientation provides lower effective Schottky barrier height in compa...

Metamaterials as artificially structural materials exhibit customized properties unattainable in nature. While dynamic response is highly desired, metamaterials are usually passive and cannot be tuned post-fabrication. A conventional active metamaterial consists of rigid resonators mounted on flexible substrates that permit a limited amount mechanical tuning. Given permanently deform or debond ...