Synthesis of Inorganic Nanotubes

Rao, C. N. R.; Govindaraj, A.

doi:10.1002/adma.200803720

Cited by 232 publications

(139 citation statements)

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“…7, 8 Therefore, physical templates such as porous alumina membranes or previously fabricated nanowires in combination with atomic layer deposition (ALD), organic surfactants in self-assembled gels or biological templates were drawn into consideration. 3,[9][10][11][12][13][14] In principle, these methods allow a precisely controlled growth of silica NTs.…”

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confidence: 99%

Template-free inorganic synthesis of silica-based nanotubes and their self-assembly to mesocrystals

et al. 2012

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A novel synthesis approach for silica-based nanotubes (NTs) was discovered in the purely inorganic system containing the molecular compounds OP(NH 2 ) 3 , SP(NH 2 ) 3 and SiCl 4 in evacuated and sealed silica glass ampoules. Without any solvent or structure directing template the amorphous NTs self-organise to form orthogonally ordered, 3D hyperbranched mesocrystals, exhibiting an interesting material for nanofluidic device applications.Silica, the most abundant solid compound on earth, occurs in a multitude of crystalline and amorphous forms and has been used for a diverse range of applications (e.g. as ceramics, quartz oscillators) for a long time.1,2 The discovery of one-dimensional silica nanotubes (NTs) 3 has generated considerable attention towards the search for further functionalities, e.g. in gas storage, drug/gene-delivery, sensing, catalysis or nanofluidic systems.4 Triggered by this high potential, research concerning new synthesis methods for silica-based hollow NTs is a topic of great interest. While two-dimensional, layered compounds exhibit an intrinsic rolling up tendency, 5,6 the preparation of purposeful NTs of three-dimensional, isotropic materials like silica, however, usually requires structure-directing templates.7,8 Therefore, physical templates such as porous alumina membranes or previously fabricated nanowires in combination with atomic layer deposition (ALD), organic surfactants in self-assembled gels or biological templates were drawn into consideration.3,9-14 In principle, these methods allow a precisely controlled growth of silica NTs. In some cases, however, the template-assisted synthesis exhibits laborious multiple-step reactions with partially toxic organic substances involved. Apart from that the process of removal of the template could be a severe problem causing collapse of a newly prepared tubular silica nanostructure. 4Silica (SiO 2 ) is isoelectronic to phosphorus oxonitride (PON) and phosphorus oxonitride imide (PN(NH)) while a structural analogy is consequent. The related compound classes of nitridophosphates and oxonitridophosphates exhibit structural chemistry with many variants including e.g. highly condensed layered as well as openframework structures. [15][16][17][18][19][20] In the course of our systematic investigation of these silicate-analogous compound classes, we discovered a novel approach for a template-and solvent-free synthesis of silicabased NTs. In a purely inorganic reaction, actually trying to synthesise a silicon oxonitridophosphate, we simply performed a reaction of a mixture of phosphoryl triamide OP(NH 2 ) 3 (ref. 21) and thiophosphoryl triamide SP(NH 2 ) 3 (ref. 7 and 22) with silicon tetrachloride SiCl 4 in a closed system of a sealed silica glass ampoule (see ESI †). For systematically exploring the system, we performed the synthesis at different temperatures from 300 to 700 C (in steps of 100 C) while maintaining all other conditions constant. Additionally, some of the syntheses were carried out with an increased amount of SiCl 4 in the ampoule...

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Template-free inorganic synthesis of silica-based nanotubes and their self-assembly to mesocrystals

et al. 2012

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“…Oxide nanotubes (NT's) such as SiO 2 , TiO 2 , ZnO, VO x and so on, have been the subject of a very active research due to their distinctive physical and chemical properties, which have promising technological applications [1]. Among these compounds are the vanadium oxide (VO x ) NT's, in which the walls are constituted by alternated layers of VO x and surfactant.…”

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confidence: 99%

Strong reduction of V4+ amount in vanadium oxide/hexadecylamine nanotubes by doping with Co2+ and Ni2+ ions: Electron paramagnetic resonance and magnetic studies

Saleta

Troiani

Guevara

et al. 2011

Journal of Applied Physics

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“…The more recent discovery of the novel properties of graphene [3,4], the mother of all graphitic carbons, has particularly enthused the scientific community to explore two-dimensional (2D) materials. Fullerenes and nanotubes of layered inorganic materials such as MoS 2 have been investigated extensively [5][6][7]. There is now a surge in research on layered 2D inorganic materials such as transition metal dichalcogenides (TMDCs).…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional inorganic analogues of graphene: transition metal dichalcogenides

Jana¹,

Rao²

2016

Phil. Trans. R. Soc. A.

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The discovery of graphene marks a major event in the physics and chemistry of materials. The amazing properties of this two-dimensional (2D) material have prompted research on other 2D layered materials, of which layered transition metal dichalcogenides (TMDCs) are important members. Single-layer and few-layer TMDCs have been synthesized and characterized. They possess a wide range of properties many of which have not been known hitherto. A typical example of such materials is MoS 2 . In this article, we briefly present various aspects of layered analogues of graphene as exemplified by TMDCs. The discussion includes not only synthesis and characterization, but also various properties and phenomena exhibited by the TMDCs.This article is part of the themed issue 'Fullerenes: past, present and future, celebrating the 30th anniversary of Buckminster Fullerene'.

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Synthesis of Inorganic Nanotubes

Cited by 232 publications

References 251 publications

Template-free inorganic synthesis of silica-based nanotubes and their self-assembly to mesocrystals

Template-free inorganic synthesis of silica-based nanotubes and their self-assembly to mesocrystals

Strong reduction of V4+ amount in vanadium oxide/hexadecylamine nanotubes by doping with Co2+ and Ni2+ ions: Electron paramagnetic resonance and magnetic studies

Two-dimensional inorganic analogues of graphene: transition metal dichalcogenides

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