The performance and reliability of ferroelectric thin films at temperatures around a few Kelvin are critical for their application in cryo-electronics. In this work, TiN/Hf_0.5Zr_0.5O₂/TiN capacitors that are free from the wake-up effect are investigated systematically from room temperature (300 K) to cryogenic temperature (30 K). We observe a consistent decrease in permittivity (ε_r) and a progressive increase in coercive electric field (E_c) as temperatures decrease. Our investigation reveals exceptional stability in the double remnant polarization (2P_r) of our ferroelectric thin films across a wide temperature range. Specifically, at 30 K, a 2P_r of 36 μC/cm² under an applied electric field of 3.0 MV/cm is achieved. Moreover, we observed a reduced fatigue effect at 30 K in comparison to 300 K. The stable ferroelectric properties and endurance characteristics demonstrate the feasibility of utilizing HfO₂ based ferroelectric thin films for cryo-electronics applications.

Mn⁴⁺掺杂的氟化物红色荧光粉的耐湿性差，严重影响了白色发光二极管（WLEDs）的光色稳定性。本工作基于绿矾溶液的还原性，将K₂SiF₆∶Mn⁴⁺颗粒表面的Mn⁴⁺还原成可溶的低价态Mn²⁺，实现了氟化物粒子的表面钝化及高耐湿性。在水浸360 h后，表面钝化的K₂SiF₆∶Mn⁴⁺粒子的发光强度仍保持初始强度的95%，而未处理的K₂SiF₆∶Mn⁴⁺颗粒发光强度迅速降为初始值的46%。此外，采用绿矾溶液对表面已水解的氟化物荧光粉进行简单的浸泡，可使其完全恢复原来的发光强度。电感耦合等离子体-原子发射光谱、X射线光电子谱、元素能谱等表征结果显示，经绿矾溶液处理的K₂SiF₆∶Mn⁴⁺粒子表面的Mn⁴⁺浓度显著减小，证实了惰性壳层K₂SiF₆的形成，揭示了氟化物粒子耐湿性显著提升的原因。此外，经高温（85^{℃）高湿（85%）的条件老化1 000 h后，WLEDs器件中表面钝化的K₂SiF₆∶Mn4+粒子仍保持着100%的红色发光强度，明显高于未钝化的氟化物的59%，进一步证实了绿矾溶液钝化的K₂SiF₆∶Mn4+红色荧光粉具有非常优异的环境稳定性。}

某些压水堆中使用氨及其分解产生的H₂抑制H₂O₂、O₂和·OH等氧化性物种的浓度，在保持一回路的还原性化学环境的同时调节冷却剂pH，以减轻结构材料的腐蚀。本工作为了研究脱氧氨水溶液在辐射场中的分解行为，针对其在γ场中的辐解过程进行了实验研究，重点考察了N₂压强、气相与液相体积之比和温度对氨水溶液辐解的影响，测定了剩余氨、H₂和氮氧化物（NO₂^-和NO₃^-）的浓度及溶液的pH。结果表明：N₂压强（0.5~5.0 MPa）及气液体积比的变化未对氨的分解和氮氧化物的生成造成影响，吸收剂量为28.8 kGy时，辐解产生的氮氧化物浓度约为1 mg/L，但N₂压强和气液体积比的增加会显著降低H₂的浓度。温度由25 ℃升至200 ℃时，氨的分解过程将大幅放缓，吸收剂量为14.4 kGy时，30 mg/L氨水中氨的分解比例由26.5%降至8.4%，高温有利于抑制氨的分解速率，但同时导致NO₂^-和NO₃^-的浓度分别升高34和3倍左右。此外，本工作中还建立了含氨冷却剂的辐解模型并对其可靠性进行了验证，不同温度下实验数据与模型预测结果的最大相对误差仅为4.1%。随后利用该模型计算了不同初始浓度的含氨冷却剂辐解过程中剩余氨的浓度变化，结果表明较高的初始浓度有利于体系中氨的保持，连续辐照的情况下单独使用氨抑制氧化性物种时需要及时对其进行补充。

Curvature sensing plays an important role in structural health monitoring, damage detection, real-time shape control, modification, etc. Developing curvature sensors with large measurement ranges, high sensitivity, and linearity remains a major challenge. In this study, a curvature sensor based on flexible one-dimensional photonic crystal (1D-PC) films was proposed. The flexible 1D-PC films composed of dense chalcogenide glass and water-soluble polymer materials were fabricated by solution processing. The flexible 1D-PC film curvature sensor has a wide measurement range of 33–133 m^-1 and a maximum sensitivity of 0.26 nm/m^-1. The shift of the transmission peak varies approximately linearly with the curvature in the entire measurement range. This kind of 1D-PC film curvature sensor provides a new idea for curvature sensing and measurement.

采用限域诱导结晶法，通过溶液法制备有机小分子半导体TIPS并五苯、聚苯乙烯和钙钛矿量子点的光突触晶体管，研究薄膜的结构和光电性质，考察突触晶体管受到不同光刺激条件调控的突触性能和行为。聚苯乙烯发挥提高有机小分子半导体薄膜结晶度以及维持突触器件长程光电流的双重作用。同时，有机复合薄膜器件实现了图形感知和记忆功能，对发展人工视觉系统具有重要意义。