Atomic-Scale Derivatives of Solid-State Materials

Abstract

There has been an expanding library of materials in which the framework connectivity of prevalent solid-state crystal structure types is terminated with ligands along specific axes to produce robust, crystalline, single-and few-atom/polyhedral thick fragments. The abrupt termination of the ionic/covalent inorganic framework along a particular direction, gives these materials fundamentally different electronic, optical, thermal, and magnetic properties, which can be manipulated via the design of the organic component. These new materials often exhibit advantageous electronic and optoelectronic behavior, making them viable platforms for applications ranging from light emitting phosphors, to thin film field effect transistors, to photovoltaics. This Perspective highlights our current understanding and future opportunities in the synthesis, properties, and applications of these atomic-scale derivatives of solid-state materials.

Chemical Functionalization of Pentagermanene Leads to Stabilization and Tunable Electronic Properties by External Tensile Strain

“…37,45 Indeed, previous experimental studies have shown that both hydrogenated- and methylated-germanene sheets with graphene-like lattices are stable at room temperature. 33,36,42 The fluorinated-germanene sheet and various chemically functionalized group-IV 2D nanosheets hereafter are suggested to be topological insulators. 3,46−48 The methylated germanene can also be driven into a topologically nontrivial state by biaxial strain.…”

“…32−34 More importantly, previous studies have shown that the structural stability, electronic structure, and transport properties of Ge-based 2D nanomaterials can be improved by covalent chemistry decoration of different surface ligands, 35−38 allowing us to tailor desirable properties to achieve practical applications in the fields of electronics and optoelectronics. 39−42…”

NONLINEAR OPTICAL PROPERTIES OF BC5CLUSTERS

“…13 Tendo em vista a inviabilidade computacional de modelar um cristal inteiro em cálculos de orbitais moleculares, o uso de modelos de cluster para representar um sistema cristalino é uma estratégia utilizada na literatura. 21 As propriedades eletrônicas e estruturais de clusters permanecem um dos problemas relevantes em ciência de materiais. 22 Os clusters podem exibir propriedades que não são características dos átomos ou do estado sólido.…”

Corrosion of Late- and Post-Transition Metals into Metal–Organic Chalcogenolates and Implications for Nanodevice Architectures

“…The metal chalcogenides are a diverse material class that includes the sulfides, selenides, and tellurides of metallic elements . This diverse material class includes high-mobility semiconductors (e.g., MoSe 2 ), superconductors (FeSe), superionic conductors (Ag 2 S), and topological insulators (HgTe). , In particular, low-dimensional semiconductor phases of these materials have drawn considerable interest because of the emergence of new properties when these compounds are reduced in size to few- or single-layer materials and are finding optoelectronic − and catalytic applications. ,− Hybrid coordination polymers have emerged as an alternate family of well-defined low-dimensional nanostructures in both the hybrid chalcogenolate − and hybrid perovskite material classes. − The organic side groups common to these compounds impart an additional dimension of chemical functionality and versatility. , In hybrid solids, one- (1D) or two-dimensional (2D) inorganic phases can be paired with ligands to form three-dimensional, crystalline supramolecular assemblies. In crystalline hybrid materials like MOChas, the organic constituent can be tailored to impact both the dimensionality and optoelectronic properties of the inorganic phase through ligand selection, forming ensemble nanostructures with well-defined chemical functionality and structure.…”