Lanthanide has attracted much attention in the field of optical communications in recent years. Some property analyses on optical waveguide of Nd doped crystal Nd x Y 1-x A1 3(BO 3) 4 and Nd∶MgO∶LiNbO 3 are made in ...Lanthanide has attracted much attention in the field of optical communications in recent years. Some property analyses on optical waveguide of Nd doped crystal Nd x Y 1-x A1 3(BO 3) 4 and Nd∶MgO∶LiNbO 3 are made in this paper, followed by introduction of the methods of experimentation and theoretical calculation for the planar optical waveguides. The refractive index profiles of the optical waveguides are analyzed. The above work offers useful information for study on new type materials for optical communications.展开更多
Poneratoxin （PoTX） is an insect neuropeptide isolated from ant venom. It was previously demonstrated that administration of synthetic PoTX into the lateral brain ventricle （icv） induced in rats significant antinoc...Poneratoxin （PoTX） is an insect neuropeptide isolated from ant venom. It was previously demonstrated that administration of synthetic PoTX into the lateral brain ventricle （icv） induced in rats significant antinociceptive effect. Moreover it was demonstrated that this effect was not mediated by opioid receptors. The aim of present study was to determine other probable mechanisms mediating antinociceptive effect of PoTX, above all： （1） to check if insect-derived pentapeptide Any-GS may influence on PoTX-induced analgesia in rats, and （2） to estimate the role of voltage-gated sodium channels in rat＇s brain in antinociceptive effect of PoTX. The study was performed on adult, female wistar rats, which a week before experiments were implanted with polyethylene cannulas into the lateral brain ventricle （icv）. Antinociceptive effect of PoTX applied directly icv was determined in rats by the test of the tail immersion. PoTX applied icv at the dose of 1 or 5 nmol induced significant antinociceptive effect in rats. Pretreatment rats with equimolar dose of 1 or 5 nmol of veratridine, an agent, which opens voltage-gated sodium channels in neurons of rat brain, did not modify effect of PoTX. On the other hand, prior icv administration of pentapeptide Any-GS significantly inhibited antinociceptive effect of both icv doses of 1 and 5 nmols of PoTX. The results of the present study demonstrated antagonistic effect Any-GS against PoTX-induced analgesia. Thus blocking effect Any-GS on PoTX-induced analgesia indicates that this insect peptide is a probable antagonist of PoTX.展开更多
Utilization of visible light is of crucial importance for exploiting efficient semiconductor catalysts for solar water splitting. In this study, an advanced ion implantation method was utilized to dope Cu ions into Zn...Utilization of visible light is of crucial importance for exploiting efficient semiconductor catalysts for solar water splitting. In this study, an advanced ion implantation method was utilized to dope Cu ions into ZnO nanorod arrays for photoelectrochemical water splitting in visible light. X-ray diffraction （XRD） and X-ray photo-electron spectroscopy （XPS） results revealed that Cu^＋ together with a small amount of Cu^2＋ were highly dispersed within the ZnO nanorod arrays. The Cu ion doped ZnO nanorod arrays displayed extended optical absorption and enhanced photoelectrochemical performance under visible light illumination （A 〉 420 nm）. A considerable photocurrent density of 18 μA/cm^2 at 0.8 V （vs. a saturated calomel electrode） was achieved, which was about 11 times higher than that of undoped ZnO nanorod arrays. This study proposes that ion implantation could be an effective approach for developing novel visible-light-driven photocatalytic materials for water splitting.展开更多
We consider the backreaction of the fundamental flavor degrees of freedom on the A dSs-Schwarz background, and calculate their contributions to the shear viscosity and jet-quenching parameter of the thermal quark-gluo...We consider the backreaction of the fundamental flavor degrees of freedom on the A dSs-Schwarz background, and calculate their contributions to the shear viscosity and jet-quenching parameter of the thermal quark-gluon plasma.展开更多
Cesium lead halide perovskite nanocrystals(NCs)have attracted unprecedented attention owing to their compelling properties for optoelectronic applications.Compared with the classical hot-injection method,the roomtempe...Cesium lead halide perovskite nanocrystals(NCs)have attracted unprecedented attention owing to their compelling properties for optoelectronic applications.Compared with the classical hot-injection method,the roomtemperature(RT)synthetic strategy is more facile and tender,but it is hard to obtain stable CsPbI3 NCs and it usually uses polar solvents that sometimes reduce the stability and properties of NCs.Here,we reported a simple approach to synthesize highly efficient and stable CsPbI3 as well as other colortunable CsPbX3 NCs with high quantum efficiency at room temperature via an anion exchange at the water-oil interface,in which the as-synthesized pristine CsPbBr3 NCs in toluene were treated in aqueous solutions of HX(X=Cl,Br,and I)and protonated oleylamine(OAm)acted as a carrier.The synthesized CsPbI3 NCs had an emission at 680 nm and even showed excellent colloidal stability after being stored for 32 d.The high efficiency and stability of the obtained CsPbX3 NCs were ascribed to the facts that:(ⅰ)the polar reagents were almost removed from the surface of NCs;(ⅱ)the defect-related nonradiative recombination was suppressed efficiently by surface passivation.展开更多
Organic electroluminescent device,also known as organic light-emitting diode (OLED),is a kind of solid state light emitting device by carrier injection which can directly transform electrical energy into luminous ener...Organic electroluminescent device,also known as organic light-emitting diode (OLED),is a kind of solid state light emitting device by carrier injection which can directly transform electrical energy into luminous energy.Due to its low operating voltage,low energy consumption,high brightness,flexibility in the choice of materials and easy realization of full color display,OLED is the potential material both in the display and illumination fields.However,there is much scope to improve the efficiency,lifetime,and reduce the cost in mass production before OLEDs can replace traditional technology in some application fields.In this work,we report the oxygen plasma immersion ion implantation (PIII) to improve the surface oxygen ratio of ITO films for further increase of surface work function above the common treatment of O2 inductively coupled plasma (ICP).The ratio of oxygen content at the surface layer was improved to be much higher than by O2 ICP treatment.A further surface work function relative increase of 0.4e V above OICP sample and 0.4 eV above the as-prepared sample can be estimated by the peak relative shift in the X-ray photoelectron spectroscopy (XPS) diagram.Moreover,the XPS characterization was carried out at least 50 h after the PIII implantation to indicate that the surface modifying effects are stable.The variations of transparency and conductivity of the PIII treated ITO samples can be neglected.展开更多
文摘Lanthanide has attracted much attention in the field of optical communications in recent years. Some property analyses on optical waveguide of Nd doped crystal Nd x Y 1-x A1 3(BO 3) 4 and Nd∶MgO∶LiNbO 3 are made in this paper, followed by introduction of the methods of experimentation and theoretical calculation for the planar optical waveguides. The refractive index profiles of the optical waveguides are analyzed. The above work offers useful information for study on new type materials for optical communications.
文摘Poneratoxin （PoTX） is an insect neuropeptide isolated from ant venom. It was previously demonstrated that administration of synthetic PoTX into the lateral brain ventricle （icv） induced in rats significant antinociceptive effect. Moreover it was demonstrated that this effect was not mediated by opioid receptors. The aim of present study was to determine other probable mechanisms mediating antinociceptive effect of PoTX, above all： （1） to check if insect-derived pentapeptide Any-GS may influence on PoTX-induced analgesia in rats, and （2） to estimate the role of voltage-gated sodium channels in rat＇s brain in antinociceptive effect of PoTX. The study was performed on adult, female wistar rats, which a week before experiments were implanted with polyethylene cannulas into the lateral brain ventricle （icv）. Antinociceptive effect of PoTX applied directly icv was determined in rats by the test of the tail immersion. PoTX applied icv at the dose of 1 or 5 nmol induced significant antinociceptive effect in rats. Pretreatment rats with equimolar dose of 1 or 5 nmol of veratridine, an agent, which opens voltage-gated sodium channels in neurons of rat brain, did not modify effect of PoTX. On the other hand, prior icv administration of pentapeptide Any-GS significantly inhibited antinociceptive effect of both icv doses of 1 and 5 nmols of PoTX. The results of the present study demonstrated antagonistic effect Any-GS against PoTX-induced analgesia. Thus blocking effect Any-GS on PoTX-induced analgesia indicates that this insect peptide is a probable antagonist of PoTX.
基金The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China （Nos. 51102194, 51323011, and 51121092）, the Doctoral Program of the Ministry of Education （No. 20110201120040） and the Nano Research Program of Suzhou City （ZXG2013003）. S. Shen is supported by the Foundation for the Author of National Excellent Doctoral Dissertation of China （No. 201335） and the Fundamental Research Funds for the Central Universities.
文摘Utilization of visible light is of crucial importance for exploiting efficient semiconductor catalysts for solar water splitting. In this study, an advanced ion implantation method was utilized to dope Cu ions into ZnO nanorod arrays for photoelectrochemical water splitting in visible light. X-ray diffraction （XRD） and X-ray photo-electron spectroscopy （XPS） results revealed that Cu^＋ together with a small amount of Cu^2＋ were highly dispersed within the ZnO nanorod arrays. The Cu ion doped ZnO nanorod arrays displayed extended optical absorption and enhanced photoelectrochemical performance under visible light illumination （A 〉 420 nm）. A considerable photocurrent density of 18 μA/cm^2 at 0.8 V （vs. a saturated calomel electrode） was achieved, which was about 11 times higher than that of undoped ZnO nanorod arrays. This study proposes that ion implantation could be an effective approach for developing novel visible-light-driven photocatalytic materials for water splitting.
基金Supported by K.C.Wong Magna Fund in Ningbo University,National Natural Science Foundation of China under Grant No.11205093National Natural Science Foundation of under Grant No.11347020
文摘We consider the backreaction of the fundamental flavor degrees of freedom on the A dSs-Schwarz background, and calculate their contributions to the shear viscosity and jet-quenching parameter of the thermal quark-gluon plasma.
基金supported by the Natural Science Foundation of Fujian Province(2019J05041)the Education Foundation of Fujian Province(JAT170021)the“Double-First Class”Foundation of Materials and Intelligent Manufacturing Discipline of Xiamen University。
文摘Cesium lead halide perovskite nanocrystals(NCs)have attracted unprecedented attention owing to their compelling properties for optoelectronic applications.Compared with the classical hot-injection method,the roomtemperature(RT)synthetic strategy is more facile and tender,but it is hard to obtain stable CsPbI3 NCs and it usually uses polar solvents that sometimes reduce the stability and properties of NCs.Here,we reported a simple approach to synthesize highly efficient and stable CsPbI3 as well as other colortunable CsPbX3 NCs with high quantum efficiency at room temperature via an anion exchange at the water-oil interface,in which the as-synthesized pristine CsPbBr3 NCs in toluene were treated in aqueous solutions of HX(X=Cl,Br,and I)and protonated oleylamine(OAm)acted as a carrier.The synthesized CsPbI3 NCs had an emission at 680 nm and even showed excellent colloidal stability after being stored for 32 d.The high efficiency and stability of the obtained CsPbX3 NCs were ascribed to the facts that:(ⅰ)the polar reagents were almost removed from the surface of NCs;(ⅱ)the defect-related nonradiative recombination was suppressed efficiently by surface passivation.
基金supported by the National Natural Science Foundation of China (Grant Nos. 11005021 and 51177017)
文摘Organic electroluminescent device,also known as organic light-emitting diode (OLED),is a kind of solid state light emitting device by carrier injection which can directly transform electrical energy into luminous energy.Due to its low operating voltage,low energy consumption,high brightness,flexibility in the choice of materials and easy realization of full color display,OLED is the potential material both in the display and illumination fields.However,there is much scope to improve the efficiency,lifetime,and reduce the cost in mass production before OLEDs can replace traditional technology in some application fields.In this work,we report the oxygen plasma immersion ion implantation (PIII) to improve the surface oxygen ratio of ITO films for further increase of surface work function above the common treatment of O2 inductively coupled plasma (ICP).The ratio of oxygen content at the surface layer was improved to be much higher than by O2 ICP treatment.A further surface work function relative increase of 0.4e V above OICP sample and 0.4 eV above the as-prepared sample can be estimated by the peak relative shift in the X-ray photoelectron spectroscopy (XPS) diagram.Moreover,the XPS characterization was carried out at least 50 h after the PIII implantation to indicate that the surface modifying effects are stable.The variations of transparency and conductivity of the PIII treated ITO samples can be neglected.
