Nanoporous alumina membranes produced by mild or hard anodisation in oxalic acid at potentials ranging from 5 - 140 V have a controllable pore surface area of up to 200 times the membrane area. They exhibit a saturating magnetic response that is temperature-independent and almost anhysteretic below room temperature. The magnetism cannot be explained by the ~1 ppm of transition-metal impurities present in the membranes. The magnetic moment increases with the area of the open nanopores, reaching values of 0.6 Bohr magnetons per square nanometer for mild anodisation and 8 muB/nm2 for hard anodisation where the growth rate is faster. Crystallization of the membrane or chemical treatment with salicylic acid reduces the effect by up to 90 %. The magnetism is therefore associated with the open pore surfaces of the amorphous Al2O3, and it is independent of the orientation of the applied field with respect to the membrane surface. Possible explanations in terms of electrons associated with oxygen vacancies (F or F+ centres) are discussed and it is concluded that the effect is due to giant orbital paramagnetism rather than collective ferromagnetic spin order.
Effect of grain boundary state and grain size on the microstructure and mechanical properties of alumina obtained by SPS: A case of the amorphous layer on particle surface
Study of amorphous alumina coatings for next-generation nuclear reactors: hightemperature in-situ and post-mortem Raman spectroscopy and X-ray diffraction
Structural origins of electronic conduction in amorphous copper-doped alumina
对一种基于电阻开关的新型存储材料--非晶掺铜氧化铝（a-Al $_2$ O $_3$：Cu）进行了{ \it ab initio}模拟，并研究了该材料中电子导电的结构起源.我们生成基于分子动力学的a-Al $_2$ O $_3$：Cu在不同的Cu浓度的模型，并研究作为Cu浓度的函数的结构，电子和振动性质。Cu原子表现出强烈的倾向于聚集在氧化铝主机，和金属化的系统通过填充带隙均匀较高的Cu浓度。我们还研究了HOMO-LUMO能量分裂的热涨落，并观察了带隙尺寸的时间演化，可以预期这对电导率有重要影响。我们进行了数值计算的传导途径，并显示其明确的依赖于铜连接在主机。我们提出了一个分析的离子动力学和结构方面的本地化的经典正常模式在我们的模型。
From pore collapse to crystal growth: ultrafast laser-induced stishovite formation in nanoporous silica
Université Jean Monnet, CNRS, Institut d’Optique Graduate School, Laboratoire Hubert Curien UMR 5516（让·莫兰大学，法国国家科学研究中心，高等光学研究院，于贝尔·居里实验室）；Department of Materials Science and Engineering, The Ohio State University（俄亥俄州立大学材料科学与工程系）
Fabrication of porous anodic alumina (PAA) templates with straight pores and with hierarchical structures through exponential voltage decrease technique
From Bulk to Surface: Structure and Dynamics of Amorphous Alumina from Deep Potential Molecular Dynamics
Princeton University（普林斯顿大学）；Shell International Exploration & Production Inc.（壳牌国际勘探与生产有限公司）；Shell India Markets Pvt., Ltd.（壳牌印度市场私人有限公司）；Shell Information Technology International Inc.（壳牌信息技术国际有限公司）
Straight versus Spongy -- Effect of Tortuosity on Polymer Imbibition into Nanoporous Matrices Assessed by Segmentation-Free Analysis of 3D Sample Reconstructions
