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《虎牙功夫嘉年华:两大王者主播将举行拳赛对决!被誉为是狼...》视频说明：这就是气墙杀招七星岩美景《科学》（20220729出书）一周论文导读2022-07-31 20:00·科学网编译 | 李言Science, 29 JUL 2022, VOL 377, ISSUE 6605《科学》2022年7月29日第377卷6605期质料科学Material ScienceInactive (PbI2)2RbCl stabilizes perovskite films for efficient solar cells非活性(PbI2)2RbCl稳固钙钛矿薄膜高效太阳能电池▲ 作者：YANG ZHAO, FEI MAZIHAN QU, SHIQI YU, TAO SHEN, HUI-XIONG DENG et al.▲ 链接：https://www.science.org/doi/10.1126/science.abp8873▲ 摘要：在卤化物钙钛矿太阳能电池中二次相过量碘化铅(PbI2)的形成对功率转换效率(PCE)有一定的起劲影响但会损害器件的稳固性并在电压扫描时造成较大的滞后效应通过RbCl掺杂我们将PbI2转化为非活性(PbI2)2RbCl化合物有用地稳固了钙钛矿相基于此要领我们获得了FAPbI3钙钛矿太阳能电池其认证功率转换效率PCE为25.6%在贮存1000小时后器件保存了96%原始功率转换效率PCE值在85°C下举行500小时热稳固性测试后保存了80%原始功率转换效率PCE值▲ Abstract：In halide perovskite solar cells the formation of secondary-phase excess lead iodide (PbI2) has some positive effects on power conversion efficiency (PCE) but can be detrimental to device stability and lead to large hysteresis effects in voltage sweeps. We converted PbI2 into an inactive (PbI2)2RbCl compound by RbCl doping, which effectively stabilizes the perovskite phase. We obtained a certified PCE of 25.6% for FAPbI3 (FA, formamidinium) perovskite solar cells on the basis of this strategy. Devices retained 96% of their original PCE values after 1000 hours of shelf storage and 80% after 500 hours of thermal stability testing at 85°C.Ion-modulated radical doping of spiro-OMeTAD for more efficient and stable perovskite solar cellsspiro-OMeTAD离子调制自由基掺杂钙钛矿电池▲ 作者：TIANKAI ZHANG, FENG WANG, HAK-BEOM KIM, IN-WOO CHOIN et al.▲ 链接：https://www.science.org/doi/10.1126/science.abo2757▲ 摘要：我们开发了一种新的spiro-OMeTAD掺杂方法通过使用稳固的有机自由基作为掺杂剂离子盐作为掺杂调制剂阻止了氧化后的问题我们实现了大于25%的能量转换效率并大大提高了卑劣条件下的装备稳固性自由基提供的空穴极化子可以瞬间增添电导率和功函数（WF）而离子盐通过影响空穴极化子的能量学进一程序节WF这种有机半导体掺杂方法可以将导电性和功函数WF可调性解耦可以引发其他光电器件的进一步优化▲ Abstract：We developed a new doping strategy for spiro-OMeTAD that avoids post-oxidation by using stable organic radicals as the dopant and ionic salts as the doping modulator (referred to as ion-modulated radical doping). We achieved PCEs of >25% and much-improved device stability under harsh conditions. The radicals provide hole polarons that instantly increase the conductivity and work function (WF), and ionic salts further modulate the WF by affecting the energetics of the hole polarons. This organic semiconductor doping strategy, which decouples conductivity and WF tunability, could inspire further optimization in other optoelectronic devices.DNA-guided lattice remodeling of carbon nanotubesDNA指导的碳纳米管晶格重构▲ 作者：ZHIWEI LIN, LETICIA C. BELTR?N, ZEUS A. DE LOS SANTOS, YINONG LI et al.▲ 链接：https://www.science.org/doi/10.1126/science.abo4628▲ 摘要：在此我们报告一种接纳鸟嘌呤碱基的DNA序列特异性交联化学的解决计划通过DNA筛选我们确定了一个序列C3GC7GC3与(8,3)对映体反应爆发最小的无序诱导拉曼模式强度和光致发光Stokes位移批注有序排列的晶格缺陷的形成冷冻电子显微镜显示C3GC7GC3-(8, 3)具有有序的DNA螺旋结构其螺距为6.5 ?反应机理剖析批注这种螺距是由一系列g修饰的碳-碳键沿着螺旋线按牢靠距离疏散而成的我们的发明可能用于纳米管晶格重构以获得新的电子特征▲ Abstract：We report a solution using DNA-directed, guanine (G)-specific cross-linking chemistry. Through DNA screening we identify a sequence, C3GC7GC3, whose reaction with an (8,3) enantiomer yields minimum disorder-induced Raman mode intensities and photoluminescence Stokes shift, suggesting ordered defect array formation. Single-particle cryo–electron microscopy shows that the C3GC7GC3 functionalized (8,3) has an ordered helical structure with a 6.5 angstroms periodicity. Reaction mechanism analysis suggests that the helical periodicity arises from an array of G-modified carbon-carbon bonds separated by a fixed distance along an armchair helical line. Our findings may be used to remodel nanotube lattices for novel electronic properties.Nanosecond protonic programmable resistors for analog deep learning用于模拟深度学习的纳秒质子可编程电阻▲ 作者：MURAT ONEN, NICOLAS EMOND, BAOMING WANG et al.▲ 链接：https://www.science.org/doi/10.1126/science.abp8064▲ 摘要：在这项事情中我们天生了硅兼容的纳米级质子可编程电阻其在极端电场下具有很是理想的特征这种操作机制使质子在室温下以一种节能的方法在纳秒内受控穿梭和插入该装置具有对称、线性和可逆的调制特征多个电导状态笼罩20× 动态规模因此全固态人工突触的时空能量性能可以大大凌驾它们的生物对应物▲ Abstract：In this work, we generated silicon-compatible nanoscale protonic programmable resistors with highly desirable characteristics under extreme electric fields. This operation regime enabled controlled shuttling and intercalation of protons in nanoseconds at room temperature in an energy-efficient manner. The devices showed symmetric, linear, and reversible modulation characteristics with many conductance states covering a 20× dynamic range. Thus, the space-time-energy performance of the all–solid-state artificial synapses can greatly exceed that of their biological counterparts.地球科学Earth ScienceConstraints on the adjustment of tidal marshes to accelerating sea level rise潮汐沼泽调理对在海平面加速上升的制约因素▲ 作者：NEIL SAINTILAN, KATYA E. KOVALENKO, GLENN GUNTENSPERGEN et al.▲ 链接：https://www.science.org/doi/10.1126/science.abo7872▲ 摘要：珍贵的潮汐沼泽生态系统在面临相关海平面上升时的懦弱性仍然存疑先前对海平面上升的恢复力的评估显示凭证今世或全新世的地质数据的差别沼泽可以通过沉积物的增添和海拔的增添来调解海平面上升的恢复力效果也截然差别通太过析今世的全球数据我们发明沼泽沉积物的增添与海平面的上升是对等的这似乎证实了之前所说的沼泽恢复力然而地基沉降量随吸积量呈非线性增添因此沼泽高度的增添受到海平面上升的限制而泛起的下降与全新世对潮汐沼泽懦弱性的视察效果一致▲ Abstract：Much uncertainty exists about the vulnerability of valuable tidal marsh ecosystems to relative sea level rise. Previous assessments of resilience to sea level rise, to which marshes can adjust by sediment accretion and elevation gain, revealed contrasting results, depending on contemporary or Holocene geological data. By analyzing globally distributed contemporary data, we found that marsh sediment accretion increases in parity with sea level rise, seemingly confirming previously claimed marsh resilience. However, subsidence of the substrate shows a nonlinear increase with accretion. As a result, marsh elevation gain is constrained in relation to sea level rise, and deficits emerge that are consistent with Holocene observations of tidal marsh vulnerability.生物学BiologyPollinators of the sea: A discovery of animal-mediated fertilization in seaweed海洋授粉者：海藻中动物介导受精的发明▲ 作者：E. LAVAUT, M.-L. GUILLEMIN, S. COLINA. FAURE et al.▲ 链接：https://www.science.org/doi/10.1126/science.abo6661▲ 摘要：恒久以来以为海洋中不保存动物授粉的看法在最近的海草研究中遭到了阻挡这增进了其他对海洋动物的研究这在红藻中尤其相关在红藻中雌性配子没有解放雄性配子没有鞭毛使用等足类动物Idotea balthica和红藻Gracilaria gracilis的实验我们证实晰生物相互作用通过动物运输体内的精子显著提高了藻类的受精乐成率这一发明批注动物介导的受精可能在陆地和海洋情形中自力进化并增添了在植物上岸之前在海洋中泛起的可能性▲ Abstract：The long-held belief that animal-mediated pollination is absent in the sea has recently been contradicted in seagrasses, motivating investigations of other marine phyla. This is particularly relevant in red algae, in which female gametes are not liberated and male gametes are not flagellated. Using experiments with the isopod Idotea balthica and the red alga Gracilaria gracilis, we demonstrate that biotic interactions dramatically increase the fertilization success of the alga through animal transport of spermatia on their body. This discovery suggests that animal-mediated fertilization could have evolved independently in terrestrial and marine environments and raises the possibility of its emergence in the sea before plants moved ashore.

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