Chemically-resolved determination of hydrogenated graphene–substrate interaction

Abstract

Selective photo-electron emission from hydrogenated graphene driven by standing wave field at Bragg condition.

Hydrogenated Graphene Improves Neuronal Network Maturation and Excitatory Transmission

“…In the case of HGr, the situation is crucially different: neurons could be expected to adhere more strongly to HGr thanks to high wettability so that, when a mature and functional network is formed, a tensile strain may be induced in the underlying HGr film. Other than having high wettability, HGr might as well be semi-suspended from the substrate as an effect of strong adhesive forces exerted by the neurons (as similarly occurs when graphene interacts with alkane layers [76] ) or even be corrugated (as CH bonds can weaken the interaction with the substrate [77] ): These two conditions could further motivate a strong mechanical interaction between neurons and HGr, and should be investigated more in the future.…”

Growth and electronic properties of bi- and trilayer graphene on Ir(111)

“…A coherent fraction of about 0.75 was found for a CVD grown single layer graphene on Ir(111) at an estimated two thirds coverage 40 and full coverage. 41 Yet MLG with a coherent fraction as low as 0.38 was reported for an oversaturated graphene sheet on Ir(111) and was suggested to arise due to wrinkles, step edges, and increased corrugation. 42 The relatively low coherent fraction of the higher energy C 1s component, associated with the presence of additional graphene layers, can similarly be attributed to the presence of wrinkles as well as to the presence of multilayer islands of different heights.…”

“…The coherent position of the sp 3 component, P 111 = 0.98 ± 0.04, is close to that of hydrogenated monolayer graphene found in ref. 41, noting that coherent positions of 0 and 1 are equivalent. These XSW results (see ESI † for details) also confirm that only the monolayer graphene areas become hydrogenated.…”

Selective hydrogenation of graphene on Ir(111): an X-ray standing wave study

“…The chemical functionalisation of graphene with elements such as uorine, 1,2,25 oxygen, 8,12,13,33 and hydrogen [3][4][5][6]18,19,23,28 has attracted attention because of the resulting changes in material properties. For hydrogen, these effects include ferromagnetism, 23,31 increased spin-orbit coupling, 26 and the opening of an electronic band gap, 5,14,24,29 which additionally can be controlled by the degree and pattern of hydrogenation.…”