Integration of Erbium‐Doped Lithium Niobate Microtubes into Ordered Macroporous Silicon

Zhao, Lili; Lu, T. Z.; Zacharias, Margit; Yu, Jian; Shen, Jun; Hofmeister, H.; Steinhart, Martin; Gösele, U.

doi:10.1002/adma.200501974

Cited by 15 publications

(4 citation statements)

References 29 publications

(30 reference statements)

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“…[14,15] When lithium niobate microtubes are prepared inside the pores of macroporous Si [16][17][18] either by thermolysis of single-source precursors at 650°C or by infiltration of LiNbO 3 melts at 1260°C, quartz forms in the silica layer on the pore walls. [19,20] All the procedures described above start from glassy silica doped with metal atoms, or they require the presence of a bulk amount of catalyst in direct contact with the SiO 2 specimens to be crystallized. It is obvious that these approaches are tedious and costly or not compatible with state-of-the-art silicon technology and clean-room standards.…”

Section: Introductionmentioning

confidence: 99%

Crystallization of Amorphous SiO₂ Microtubes Catalyzed by Lithium

Zhao

Langner

et al. 2007

Adv Funct Materials

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Amorphous silica formed by thermally oxidizing silicon is commonly eligible for lithographic patterning or can be grown on patterned substrates. However, it is still a challenge to combine controlled microstructuring with controlled crystallization of SiO2. Here, it is shown that traces of volatile lithium species transported through the gas phase catalyze the crystallization of silica integrated into common silicon microstructures. The selected crystallization temperature determines which polymorph forms. As an example, the formation of quartz, tridymite, and cristobalite microtubes by thermally oxidizing macroporous silicon is investigated. Lithium‐induced crystallization may extend state‐of‐the‐art silicon technology and yield nano‐ and microstructures consisting of different silica polymorphs, which are, in contrast to many functional oxides, nontoxic.

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Section: Introductionmentioning

confidence: 99%

Crystallization of Amorphous SiO₂ Microtubes Catalyzed by Lithium

Zhao

Langner

et al. 2007

Adv Funct Materials

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“…Similar to this approach, there is another versatile hard template strategy, which usually takes porous template such as anodic alumina oxide (AAO) and track-etched polymer membranes. During this process, the desired nanotube materials can be filled to the pores of porous template via precursor infiltration/wetting [ 34 ], electrochemical decoration [ 35 ], or ALD [ 36 , 37 ], and followed by template removing, the desired materials nanotubes can be achieved. A typical procedure is shown in Fig.…”

Section: Classical Preparation Methodsmentioning

confidence: 99%

Tube Formation in Nanoscale Materials

et al. 2008

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The formation of tubular nanostructures normally requires layered, anisotropic, or pseudo-layered crystal structures, while inorganic compounds typically do not possess such structures, inorganic nanotubes thus have been a hot topic in the past decade. In this article, we review recent research activities on nanotubes fabrication and focus on three novel synthetic strategies for generating nanotubes from inorganic materials that do not have a layered structure. Specifically, thermal oxidation method based on gas-solid reaction to porous CuO nanotubes has been successfully established, semiconductor ZnS and Nb 2 O 5 nanotubes have been prepared by employing sacrificial template strategy based on liquid-solid reaction, and an in situ template method has been developed for the preparation of ZnO taper tubes through a chemical etching reaction. We have described the nanotube formation processes and illustrated the detailed key factors during their growth. The proposed mechanisms are presented for nanotube fabrication and the important pioneering studies are discussed on the rational design and fabrication of functional materials with tubular structures. It is the intention of this contribution to provide a brief account of these research activities.

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Section: Introductionmentioning

confidence: 99%

“…In addition to abovementioned, successful synthesis of nanoparticles of an important optical material, LiNbO3, in mesoporous matrix has been reported [16]. Moreover, the authors in [21] have embedded lithium niobate microtubes inside macroporous silicon to achieve superior optical properties. Thus, the main goal of the research presented in this paper is to develop original approach to enhancing the energy efficiency of the induced optical interactions in both intrinsically and artificially anisotropic materials at macroscale and nanoscale and to implement the results into a relevant innovative product.…”

Section: Introductionmentioning

confidence: 99%

Nanoengineering of anisotropic materials for creating the active optical cells with increased energy efficiency

Andrushchak

Goering²,

Andrushchak

2018

2018 14th International Conference on Advanced Trends in Radioelecrtronics, Telecommunications and Computer Engineering (TCSET)

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In this paper the state-of-the-art for exploiting the unique physical and chemical properties of crystalline materials and their possible applications for development of crystalline nanocomposites with the tailored anisotropy were discussed. Using a method of growing crystals from a solution the KDP and TGS nanocrystalites were grown in the mezopores of the Al2O3 matrix. To investigate the developed nanocrystalline samples the X-ray analysis was used. A form of the obtained diffractograms and our calculations show the predominant crystallization of the KDP and TGS in the direction [100], which coincides with the direction of the cylindrical pores. Thus, diffractograms contain only reflexes of crystallographic planes (200) and (400). The achieved result indicates the possibility of growing of nanocrystals in mesopores of such Al2O3 structures developed by us and provides the prospect of creating optical cells with increased energy efficiency.

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Integration of Erbium‐Doped Lithium Niobate Microtubes into Ordered Macroporous Silicon

Abstract: Doping host systems with rare-earth elements yields functional materials with superior optical properties. Trivalent erbium, Er 3+ , is of particular interest because the sharp optical intra-4f transitions from the first excited state 4

Cited by 15 publications

References 29 publications

Crystallization of Amorphous SiO₂ Microtubes Catalyzed by Lithium

Crystallization of Amorphous SiO₂ Microtubes Catalyzed by Lithium

Tube Formation in Nanoscale Materials

Nanoengineering of anisotropic materials for creating the active optical cells with increased energy efficiency

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Integration of Erbium‐Doped Lithium Niobate Microtubes into Ordered Macroporous Silicon

Abstract: Doping host systems with rare-earth elements yields functional materials with superior optical properties. Trivalent erbium, Er 3+ , is of particular interest because the sharp optical intra-4f transitions from the first excited state 4

Cited by 15 publications

References 29 publications

Crystallization of Amorphous SiO2 Microtubes Catalyzed by Lithium

Crystallization of Amorphous SiO2 Microtubes Catalyzed by Lithium

Tube Formation in Nanoscale Materials

Nanoengineering of anisotropic materials for creating the active optical cells with increased energy efficiency

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Product

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Crystallization of Amorphous SiO₂ Microtubes Catalyzed by Lithium

Crystallization of Amorphous SiO₂ Microtubes Catalyzed by Lithium