Conveners
M2-11 Materials synthesis and characterization II (DCMMP) | Synthèse et caractérisation de matériaux II (DPMCM)
- Emanuele Orgiu (Institut national de la recherche scientifique (INRS), EMT Centre)
The isolation of single layer graphene in 2004 by Geim and Novoselov introduced a technique that researchers could extend to the broad family of van der Waals materials. Just as the van der Waals bonds responsible for holding together adjacent layers of two-dimensional (2D) materials can be broken, they can also be put back together. Crystals can then be reassembled with layers from different...
2D transition-metal dichalcogenides (TMDs) exhibit unique optical and electronic properties that make them highly appealing to the scientific community. Like graphene, they have strong in-plane bonds and weak out-of-plane bonds, allowing for easy fabrication of complex single layer structures or molecular heterostructures. In particular, MoS2 is a TMD semiconductor that displays emerging...
Experiments were performed on natural crystals of biotite in an attempt to quantify the effects of impurities on acoustic phonon behaviour and elastic properties in this mica series. Electron probe microanalyzer(EPMA) was used to quantify the chemical compositions of biotite with differing concentrations of Fe and Mg. Brillouin light scattering spectra of these samples contained peaks due to...
GaN nanowires (NWs) have been applied in devices including light emitting diodes (LEDs) photodetectors and laser diodes, but control of the dopant distribution has been a difficult task [1]. Also it is well known that polarization effects have an influence on device properties. A previous report on GaN NWs found an effect of strain on the charge distribution via off-axis electron holography EH...
Silicon nanowires (SiNWs) are attractive for a variety of applications such as photoelectrochemical (PEC) devices for hydrogen fuel production which require precise compositional and morphological control for abrupt electrical interfaces. However, SiNWs grown by the vapour-solid-liquid method typically encounters problems such as nonselective deposition on sidewalls, catalyst-induced...
ZnO is a II-VI semiconductor with a wide bandgap of 3.37 eV. This makes it a good candidate for transparent solar cells and for near-ultraviolet LEDs. In the following, a Ta/Ru/Au thin film is sputter deposited on a (110) Si substrate as a seed layer. The Ta layer appears to be amorphous while the orientation of the deposited metal films is found to be Ru (001), Au (111) by X-ray diffraction....
