简介：Chalcopyrite-typeCuInSe2nanoparticlesaresuccessfullypreparedbyusingIn2Se3nanoparticlesasaprecursorreactedwithcopperchloride(CuCl)solutionviaaphasetransformationprocessinlowtemperature.Thereactiontimeisakeyparameter.Afterthereactiontimeincreasingfrom0.5hto8h,In2Se3andCuClreactwitheachothergraduallyviaphasetransformationintoCuInSe2withoutanyintermediatephase.ThecrystallinestructureandmorphologyoftheCuInSe2nanoparticlesarecharacterizedbyX-raydiffraction(XRD)andfieldemissionscanningelectronmicroscopy(FESEM).ThediameterofCuInSe2nanoparticleswithgooddispersibilityrangesfrom10nmto20nm.ThebandgapoftheCuInSe2nanoparticlesis1.04eVcalculatedfromtheultraviolet-visible(UV-VIS)spectrum.

简介：Thispaperproposesanewtechniquethatisusedtoembeddepthmapsintocorresponding2-dimensional(2D)images.Sincea2Dimageanditsdepthmapareintegratedintoonetypeofimageformat,theycanbetreatedasiftheywereone2Dimage.Thereby,itcanreducetheamountofdatain3Dimagesbyhalfandsimplifytheprocessesforsendingthemthroughnetworksbecausethesynchronizationbetweenimagesfortheleftandrighteyesbecomesunnecessary.Weembeddepthmapsinthequantizeddiscretecosinetransform(DCT)dataof2Dimages.Thekeytothistechniqueiswhetherthedepthmapscouldbeembeddedinto2Dimageswithoutperceivablydeterioratingtheirquality.Wetrytoreducetheirdeteriorationbycompressingthedepthmapdatabyusingthedifferencesfromthenextpixeltotheleft.Weassumethatthereisonlyonenon-zeropixelatmostononehorizontallineintheDCTblockbecausethedepthmapvalueschangeabruptly.Weconductanexperimenttoevaluatethequalityofthe2Dimagesembeddedwithdepthmapsandfindthatsatisfactoryqualitycouldbeachieved.

简介：Wetheoreticallypresenttheintrinsiclimitstoelectronmobilityinthemodulation-dopedAlGaN/GaNtwo-dimensionalelectrongas(2DEG)duetoeffectsincludingacousticdeformationpotential(DP)scattering,piezoelectricscattering(PE),andpolar-opticphononscattering(POP).WefindthatDEandPEarethemoresignificantlimitingfactorsatintermediatetemperaturesof40Kto250K,whilePOPbecomesdominantasroomtemperatureisapproached.Detailednumericalresultsarepresentedforthechangeofelectronmobilitywithrespecttotemperatureandcarrierdensity.Weconcludethatthesethreetypesofphononscattering,whicharegenerallydeterminedbythematerialpropertiesbutnotthetechnicalprocessing,arehardlimitstothe2DEGmobility.

简介：研究表明含氟气体的性质决定了原子氟（F）的转化效率,通常在CxFy气体中x的值越大,氟（F）的转化效率也就会越高。所以C3F8（八氟丙烷）比C2F6（乙氟烷）具有更高的利用效率,更少的PFC（全氟化物）的排放。文章主要研究在以四乙氧基硅烷（TOES）为基础的离子增强化学气相沉积（PlasmaEnhancedChemicalVaporDeposition,PECVD）的清洗制程中,利用分解效率高的C3F8气体取代C2F6气体。通过实验设计（DesignOfExperiment,DOE）,调整腔体压力、射频（RF）功率、气体流量等参数,最终得到最优化的新清洗配方。应用到实际的量产中,有效地降低了成本,减少了PFC的排放。