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Ordered SrTiO_3 nanoripples Induced by Focused Ion Beam

Nano-Micro Letters 2012年第4期4卷 243-246页

作者： Jiang Wu Gang Chen Zhaoquan Zeng Shibin Li Xingliang Xu Zhiming M.Wang Gregory J.Salamo State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Institute of Intelligent Optoelectronic Technology Zhejiang University of Technology Institute for Nanoscience and Engineering University of Arkansas

Ordered nanoripples on the niobium-doped SrTiO_3 surfaces were fabricated through focused ion beam bombardment. The surface morphology of the SrTiO_3 nanoripples was characterized using in situ focused ion beam/scanning electron microscopy. The well-aligned SrTiO_3 nanostructures were obtained under optimized ion irradiation conditions. The characteristic wavelength was measured as about 210 nm for different ion beam currents. The relationship between the ion irradiation time and current and SrTiO_3 surface morphology was analyzed. The presented method will be an effective supplement for fabrication of SrTiO_3 nanostructures that can be used for ferroelectric and electronic applications.

关键词： SrTiO3 focused ion beam nanoripple self-assembly

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High-Density Nanowells Formation in Ultrafast Laser-Irradiated Thin Film Metallic Glass

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Nano-Micro Letters 2022年第6期14卷 308-322页

作者： Mathilde Prudent Djafar Iabbaden Florent Bourquard Stéphanie Reynaud Yaya Lefkir Alejandro Borroto Jean-François Pierson Florence Garrelie Jean-Philippe Colombier Univ Lyon UJM-Saint-EtienneCNRSInstitute of Optics Graduate SchoolLaboratoire Hubert CurienUMR CNRS 551642023 St-EtienneFrance Universitéde Lorraine CNRSIJL54000 NancyFrance

We present an effective approach for fabricating nanowell arrays in a one-step laser process with promising applications for the storage and detection of chemical or biological *** thin films of metallic glasses are manufactured with a selected composition of Zr_(65)Cu_(35),known to exhibit remarkable mechanical properties and glass forming *** nanowell arrays spontaneously form in the ultrafast laser irradiation spot with dimensions down to 20 *** flared shape observed by transmission electron microscopy is ideal to ensure chemical or biological material immobilization into the *** also indicates that the localization of the cavitation-induced nanopores can be tuned by the density and size of the initial nanometric interstice from the columnar structure of films deposited by magnetron *** addition to the topographic functionalization,the laser-irradiated amorphous material exhibits structural changes analyzed by spectroscopic techniques at the nanoscale such as energy-dispersive X-ray spectroscopy and electron energy loss *** reveal structural changes consisting of nanocrystals of monoclinic zirconia that grow within the amorphous *** mechanism is driven by local oxidation process catalyzed by extreme temperature and pressure conditions estimated by an atomistic simulation of the laser-induced nanowell formation.

关键词： Nanowell nanoripple Metallic glass Surface functionalization Femtosecond laser

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