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| 1 | Influence of oxygen partial pressure on properties of N-doped ZnO films deposited by magnetron sputtering显示文摘N-doped ZnO films were radio frequency(RF)sputtered on glass substrates and studied as a function of oxygen partial pressure(OPP)ranging from 3.0×10-4 to 9.5×10-3 Pa.X-ray diffraction patters confirmed the polycrystalline nature of the deposited films.The crystalline structure is influenced by the variation of OPP.Atomic force microscopy analysis confirmed the agglomeration of the neighboring spherical grains with a sharp increase of root mean square(RMS)roughness when the OPP is increased above 1.4×10-3 Pa.X-ray photoelectron spectroscopy analysis revealed that the incorporation of N content into the film is decreased with the increase of OPP,noticeably N 1s XPS peaks are hardly identified at 9.5×10-3 Pa.The average visible transmittance(380-700 nm) is increased with the increase of OPP(from~17%to 70%),and the optical absorption edge shifts towards the shorter wavelength.The films deposited with low OPP(≤3.0×10-4 Pa)show n-type conductivity and those deposited with high OPP(≥9.0×10-4 Pa)are highly resistive(>105Ω·cm) | 王金忠 E.ElANGOVAN N.FRANCO A.ALVESE A.REGO R.MARTINS E.FORTUNATO | 2010 | Transactions of Nonferrous Metals Society of China2010，20，12： | 5 |
| 2 | 不同衬底温度下射频磁控溅射磷掺杂ZnO薄膜的性质显示文摘为研究在低温衬底上沉积磷掺杂ZnO薄膜的性质,从室温到350°C的范围内磷掺杂的ZnO被磁控溅射到蓝宝石衬底上。样品的XRD谱显示薄膜为<001>方向择优生长,ZnO(002)面的衍射峰在250°C时最低。原子力图像分析显示:薄膜的表面形貌随沉积温度而变化,粗糙度随温度升高而增加。样品的XPS谱在134eV附近清晰地观测到了磷的P2p峰,且组分随衬底温度而变化。在400~600nm的范围内样品的平均光学透射率大于60%,所计算的光学带隙大约为3.2 eV。薄膜的Hall测量表明薄膜为n型电导,且薄膜中的载流子浓度随温度的升高而降低。该工作有助于对ZnO低温磷掺杂薄膜性质的了解,从而在低温下获得磷掺杂的ZnO p型导电薄膜。 | 王金忠 李美成 Vincent Sallet A.Rego R.Martins E.Fortunato | 2011 | 红外与激光工程2011，40，8： | 4 |
| 3 | Antiglycation,antioxidant,antiacne,and photoprotective activities of crude extracts and triterpene saponin fraction of Sapindus saponaria L.fruits:An in vitro study显示文摘Objective:To evaluate the photoprotective,antioxidant,antiglycation,and antiacne activities of crude extract(CESs)and triterpene saponin fraction(TSSs)of Sapindus saponaria.Methods:HPLC-MS purification was performed on a Symmetry TM C18 column.The saponins were identified by a UV detector.Antioxidant activity was evaluated by DPPH and O_(2)^(−)radicals scavenging,and FRAP and TBARS assays.Glycation activity was assessed by relative electrophoretic mobility and inhibition of advanced glycation end products(AGEs)formation.Additionally,antiacne activity was determined by inhibition of Cutibacterium acnes,and photoprotective effect was evaluated by Mansur’s method.Results:Most of the triterpene saponins detected in the fraction by HPLC-MS analysis were hederagenin as the aglycon.CESs and TSSs presented varying antioxidant activity in DPPH(CESs:75.69%and TSSs:83.65%),FRAP(CESs:425.39μM TE/g DW and TSSs:649.36μM TE/g DW),TBARS(CESs:42.96%and TSSs:52.16%)and O_(2)^(−)radicals scavenging(CESs:61.33%and TSSs:86.69%)tests.CESs and TSSs also exhibited antiglycation activity comparable to bovine serum albumin treated with aminoguanidine.In addition,CESs and TSSs showed inhibition of AGE formation(34.48%and 61.85%,respectively).Antiacne activity against Cutibacterium acnes was observed with a minimum inhibitory concentration equal to minimum bactericidal concentration(CESs:36.11µg/mL and TSSs:18.34µg/mL).In photoprotective assays,CESs and TSSs showed maximum absorbance of 1.42 to 0.20 and 2.80 to 1.30,respectively,in the wavelength range of 260 to 400 nm.Furthermore,CESs and TSSs showed sun protection factors of 8.89 and 14.89,respectively.Conclusions:Sapindus saponaria fruit extracts show strong antioxidant potential and antiglycation activity against bovine serum albumin glycation and AGE formation.Besides,they presented antibacterial activity against Cutibacterium acnes and photoprotective effect against UV-A and UV-B. | Regildo M.G.Silva Gustavo R.Martins Laura M.B.Nucci Filipe O.Granero Célia C.M.Figueiredo Patrícia S.Santiago Luciana P.Silva | 2022 | Asian Pacific Journal of Tropical Biomedicine2022，12，9： | 1 |
| 4 | Recent progress in water splitting and hybrid supercapacitors based on nickel-vanadium layered double hydroxides显示文摘Environmentally friendly energy sources alternatives to fossil fuels such as solar and wind are strategic for meeting the needs of an increasingly energy demanding society,despite their periodic/intermittent nature.Thus,urge the development of clean and renewable energy sources such as based on solar energy and water in a cyclic way,by photoinduced water-splitting and regeneration in fuel cells.In this context,energy storage devices such as hybrid supercapacitors become fundamental for realization of a sustainable society.In this review,the early discovery and recent advances concerning synthetic strategies,hierarchical structures,and oxygen evolution reaction(OER)/hydrogen evolution reactions(HER) catalytic performances of nickel-vanadium double hydroxides(NiV-LDHs) based nanomaterials are summarized.A discussion about the role of vanadium ions in HER/OER was also included,highlighting the recent progress in theoretical calculations in this field.Finally,some hybrid supercapacitor electrode materials based on NiV-LDHs are described,including the strategies to circumvent the parasitic oxygen evolution reaction during charge-discharge of those energy storage devices.In short,catalysts for HER/OER and hybrid supercapacitor electrode materials based on NiV-LDHs were reviewed considering their key multifunctional role in the way to a more sustainable society. | JosuéM.Gonçalves Paulo R.Martins Koiti Araki Lucio Angnes | 2021 | Journal of Energy Chemistry2021，30，6： | 1 |
| 5 | Optimizing the use of open chambers to measure ammonia volatilization in field plots amended with urea显示文摘Measuring ammonia(NH_(3))volatilization from urea-fertilized soils is crucial for evaluation of practices that reduce gaseous nitrogen(N)losses in agriculture.The small area of chambers used for NH_(3)volatilization measurements compared with the size of field plots may cause significant errors if inadequate sampling strategies are adopted.Our aims were:i)to investigate the effect of using multiple open chambers on the variability in the measurement of NH_(3)volatilization in urea-amended field plots and ii)to define the critical period of NH_(3)-N losses during which the concentration of sampling effort is capable of reducing uncertainty.The use of only one chamber covering 0.015%of the plot(51.84 m^(2))generates a value of NH_(3)-N loss within an expected margin of error of 30%around the true mean.To reduce the error margin by half(15%),3–7 chambers were required with a mean of 5 chambers per plot.Concentrating the sampling efforts in the first two weeks after urea application,which is usually the most critical period of N losses and associated errors,represents an efficient strategy to lessen uncertainty in the measurements of NH_(3)volatilization.This strategy enhances the power of detection of NH_(3)-N loss abatement in field experiments using chambers. | Márcio R.MARTINS Leonardo F.SARKIS Selenobaldo A.C.SANT’ANNA Camila A.SANTOS Karla E.ARAUJO Ricardo C.SANTOS Ednaldo S.ARAÚJO Bruno J.R.ALVES Claudia P.JANTALIA Robert M.BODDEY Mohammad ZAMAN Segundo URQUIAGA | 2021 | Pedosphere2021，31，2： | 0 |
| 6 | A simple and easy method to measure ammonia volatilization:Accuracy under field conditions显示文摘Field studies on soil ammonia(NH_(3))volatilization are restricted in many countries owing to the high costs commonly demanded for accurate quantification.We assessed the accuracy of a simple,open chamber design to capture NH_(3)under field conditions,as affected by different chamber placement schemes.Urea-15 N was surface applied to lysimeters installed in the spaces between maize rows.Open chambers made from plastic bottles were installed on each lysimeter with variations in i)N rates(3,8,13,and 18 g m^(-2)),ii)the height of the chamber above the soil surface(0,5,and 10 mm),and iii)chamber relocation(static vs.dynamic).Reference lysimeters without chambers were used to measure NH_(3)losses by^(15)N-balance.Losses of NH_(3)-N accounted for more than 50%of the applied N.Relocation of the chambers had no impact on their NH_(3)-trapping efficiencies,proving to be an unnecessary procedure.Variation in the height of the chambers above the soil surface affected the capture of NH_(3),but the results still maintained high linearity with the NH_(3)losses quantified by the reference method(R^(2)>0.98).When the same placement scheme used in the introductory study describing the chamber was utilized(static and touching the soil surface),we found a trapping efficiency of 60%,which was very similar to that(57%)obtained in the previous study.Our results show that this simple,open chamber design can be used with satisfactory accuracy under field conditions,provided that simple,standardized procedures are warranted. | Márcio R.MARTINS Leonardo F.SARKIS Roni F.GUARESCHI Camila A.SANTOS Selenobaldo A.C.SANT’ANNA Mohammad ZAMAN Claudia P.JANTALIA Bruno J.R.ALVES Robert M.BODDEY Ednaldo S.ARAÚJO Segundo URQUIAGA | 2021 | Pedosphere2021，31，2： | 0 |
| 7 | Light management with quantum nanostructured dots-in-host semiconductors显示文摘Insightful knowledge on quantum nanostructured materials is paramount to engineer and exploit their vast gamut of applications.Here,a formalism based on the single-band effective mass equation was developed to determine the light absorption of colloidal quantum dots(CQDs)embedded in a wider bandgap semiconductor host,employing only three parameters(dots/host potential barrier,effective mass,and QD size).It was ascertained how to tune such parameters to design the energy level structure and consequent optical response.Our findings show that the CQD size has the biggest effect on the number and energy of the confined levels,while the potential barrier causes a linear shift of their values.While smaller QDs allow wider energetic separation between levels(as desired for most quantumbased technologies),the larger dots with higher number of levels are those that exhibit the strongest absorption.Nevertheless,it was unprecedently shown that such quantum-enabled absorption coefficients can reach the levels(10^(4)–10^(5) cm^(−1))of bulk semiconductors. | M.Alexandre H.Águas E.Fortunato R.Martins M.J.Mendes | 2021 | Light(Science & Applications)2021，10，12： | 0 |
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