Probing the coupling between the components in a graphene–mesoporous germanium nanocomposite using high-pressure Raman spectroscopy

Abstract

The nature of the interface between the components of a nanocomposite is a major determining factor in the resulting properties. Using a graphene-mesoporous germanium nanocomposite with a core-shell structure as...

Large‐Scale Formation of Uniform Porous Ge Nanostructures with Tunable Physical Properties

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a potential in wide range of implementations such as energy storage systems, [5][6][7][8][9][10] thermoelectric devices, [11] sensors, [12][13][14] optoelectronics, [15,16] or synthesis of nanocomposite materials. [17][18][19] Moreover, PGe has recently been demonstrated as an efficient virtual substrate for epitaxial growth of detachable Ge membranes [20] and III-V heterostructures with high crystalline quality [21,22] paving the way to direct application in the development of lightweight and flexible photovoltaics and optoelectronics. [23,24] Nevertheless, to bring these applications to the real world, a largescale formation of homogeneous PGe layers with on demand characteristics is necessary.The fabrication of PGe nanostructures was demonstrated using techniques such as thermal reduction of GeO 2 nanoparticles, [25] oxidative polymerization of the deltahedral [Ge 9 ] 4− cluster, [26] spark processing, [27] reduction-alloying-dealloying approach, [28] ion implantation, [29,30] growth by Molecular Beam epitaxy, [15] coupled plasma chemical vapor deposition, [31] metal-assisted chemical etching, [32] lithography and dry etching, [23] and electrochemical etching.

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“…a potential in wide range of implementations such as energy storage systems, [5][6][7][8][9][10] thermoelectric devices, [11] sensors, [12][13][14] optoelectronics, [15,16] or synthesis of nanocomposite materials. [17][18][19] Moreover, PGe has recently been demonstrated as an efficient virtual substrate for epitaxial growth of detachable Ge membranes [20] and III-V heterostructures with high crystalline quality [21,22] paving the way to direct application in the development of lightweight and flexible photovoltaics and optoelectronics. [23,24] Nevertheless, to bring these applications to the real world, a largescale formation of homogeneous PGe layers with on demand characteristics is necessary.…”