As compared to Si-NCs:SiO 2 prepared by the regular method of phase separation of silicon oxide (SiOx) (1 < x < 2), the Si-NCs:SiO 2 prepared from HSQ is more luminescent and the PL peak position is readily tunable by chemical etching. PL peak positions of 570 nm, 610 nm and ...
.TheGe film()isGe220-1preferablyorientatedandtheRamanpeakpositionforthisfilm isat300.3cm.AllresultsindicatethatHWCVDisanexcellentmethodforfilmep itaxyatlowtemperature. Keywords:hot2wireCVD;lowtemperatureepitaxialtechnique;c2Sisubstrate; Sifilm;Gefilm 1引言 大规模、超大规模集成电路及高速器件的发展,需要衬底...
substratesbymetal—organicchemicalvapordeposition(MOCVD)wereinvestigated.TheRaman peakpositionsintheE2(TO) 一highmodeofGaNareapproachtOthatofbulkGaN(568cm叫) withtheincreaseoflow—temperatureAlNinterlayers.ThestressofGaNgrownonSisubstrates wasreducedfrom1.09GPato0.42GPa.Thereductionofthestresswasalsoconfirmedbythe...
Raman investigations of the surface modes of the crystallites in CdS thin films grown by pulsed laser and thermal evaporation CdS films have been grown on Corning glass by pulsed laser evaporation (PLE) and thermal evaporation (TE) techniques at a substrate temperature between roo... DS Chuu,...
The LSPR peak position of the particle mode can be tuned by changing the size of the Ag cap, and can be hybridized by leaning of pillars. The resonance position of the cavity resonance mode can be tuned primarily via the diameter of the Si pillar, and cannot be tuned via leaning of Ag...
Raman peak to move away from the intrinsic peak and towards the high wave number (blue shift), while dislocation defects, quantum confinement effect, and tensile strain make the Raman peak shift from intrinsic position to low wave number (red shift). The blue shift of the Ge–Ge peak in ...
Surface enhanced Raman spectroscopy (SERS) has been established as a powerful tool to detect very low-concentration bio-molecules. One of the challenging problems is to have reliable and robust SERS substrate. Here, we report on a simple method to grow coherently embedded (endotaxial) silver nano...
(e) Raman spectrum of R6G with the concentration of 10−12 M on the GO/AgNPs/ PCu@Si substrate under the laser wavelength with 473, 532 and 633 nm respectively. (f) The intensity of the R6G at 613 cm−1 peak changes as a function of the laser wavelength. Figure 5. (a...
In addition, the pump photon flux dependence of the PL peak position has two different ranges. The PL band blueshifts with the pump flux; however, the rate of this shift clearly decreases in the high-flux excitation range. The blue spectral shift at low powers is commonly attributed to the...
Compared to bulk silicon, silicon nanocrystals (Si-NCs) show modified properties, such as tunable emission and enhanced radiative rate, as a result of the quantum confinement, surface chemistry and environment. While the effect of quantum confinement is well understood and experimentally confirmed on ...