XPS/NEXAFS spectroscopic and conductance studies of glycine on AlGaN/GaN transistor devices

Interfacial Chemistry Modulation via Amphoteric Glycine for a Highly Reversible Zinc Anode

“…For the pure Gly, due to the zwitterionic structure of Gly in the solid state, characteristic peaks of protonated amino groups (NH 3 + ) and deprotonated carboxyl groups (COO – ) can be observed from N 1s and O 1s spectra (Figure S6). For the Zn metal after being soaked in Gly/ZnSO 4 , apparent peaks of C–N and strong amino groups appear in C 1s (Figure f) and N 1s spectra (Figure g). Additionally, compared to the peak of carboxyl groups of Gly in O 1s spectra, the peak of COO-Zn becomes broadened and shifts to lower binding energy (Figure h), indicating that Gly chemically absorbs on the Zn surface instead of weakly physically absorbs.…”

Preparation of controllable double-selective etched porous substrate for HVPE growth of GaN crystals with excellent optical properties

“…In order to investigate the impurities in the GaN crystal, XPS characterization was performed. [28][29][30][31] Fig. 6a shows that the impurity elements presented in the GaN crystal grown on the HMGA substrate are Si, O and C. The Si and O elements are brought in by the quartz parts in the growth environment, and the C element is brought in by graphite, such as the substrate holder (high resolution XPS profile for each element, please refer to ESI † 3).…”