Epitaxial II–VI Tripod Nanocrystals: A Generalization of van der Waals Epitaxy for Nonplanar Polytypic Nanoarchitectures

Utama, M. Iqbal Bakti; Zhang, Qing; Jia, Shuangfeng; Li, Dehui; Wang, Jianbo; Xiong, Qihua

doi:10.1021/nn204344z

Cited by 55 publications

(80 citation statements)

References 66 publications

(119 reference statements)

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“…Additional Raman peaks at 280 cm À1 and 900 cm À1 have also been observed for Mn doped CdS nanowires, the farmer can be attributed to the surface phonon mode and the later can be attributed to multiphonon Raman scattering (3LO) of CdS. The assignment of the Raman scattering peaks is in great agreement with the earlier reports [38][39][40][41][42][43]. It is significant to note that the intensity of multiphonon features can be efficiently enhanced and tuned by increasing the Mn doping concentration in CdS:Mn nanowires.…”

Section: Resultssupporting

confidence: 90%

Room temperature ferromagnetism in Mn doped CdS nanowires

Murali

Reddy

Giribabu

et al. 2013

Journal of Alloys and Compounds

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Section: Resultssupporting

confidence: 90%

Room temperature ferromagnetism in Mn doped CdS nanowires

Murali

Reddy

Giribabu

et al. 2013

Journal of Alloys and Compounds

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“…Nanoscale structures are most commonly obtained in the form of nanowires. Interestingly, growth at the nanoscale allows materials to form other peculiar structures such as nanotrees [9], tripods and tetrapods [10,11], nano-membranes, nanowalls and nanoplates [12][13][14][15][16][17][18][19][20]. The possibility of modifying the shape of nanostructures in bottom-up manner opens new perspectives in research areas where surfaces and shape is important such as: energy storage [21], energy generation [22,23] and non-linear optics [24,25].…”

Section: Introductionmentioning

confidence: 99%

Growth mechanisms and process window for InAs V-shaped nanoscale membranes on Si[001]

Russo-Averchi¹,

Dalmau-Mallorquí²,

Canales-Mundet³

et al. 2013

Nanotechnology

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Organized growth of high aspect-ratio nanostructures such as membranes is interesting for opto-electronic and energy harvesting applications. Recently, we reported a new form of InAs nano-membranes grown on Si substrates with enhanced light scattering properties. In this paper we study how to tune the morphology of the membranes by changing the growth conditions. We examine the role of the V/III ratio, substrate temperature, mask opening size and inter-hole distances in determining the size and shape of the structures. Our results show that the nano-membranes form by a combination of the growth mechanisms of nanowires and the Stranski-Krastanov type of quantum dots: in analogy with nanowires, the length of the membranes strongly depends on the growth temperature and the V/III ratio; the inter-hole distance of the sample determines two different growth regimes: competitive growth for small distances and an independent regime for larger distances. Conversely, and similarly to quantum dots, the width of the nano-membranes increases with the growth temperature and does not exhibit dependence on the V/III ratio. These results constitute an important step towards achieving rational design of high aspect-ratio nanostructures.

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“…1,13 Meanwhile, some researchers have dedicated their efforts to the vdWE growth of nonlayered materials such as ZnSe quantum dots on GaSe, 14 ZnO nanowire arrays on graphene, 15 InAs nanowires array on graphene 16 and GaAs nanowires array on graphene. 17 Very recently, Q. Xiong et al further conducted the incommensurate vdWE growth of vertically aligned ZnO nanowires array 18 and IIÀVI tripod nanocrystals 19 on mica. These works are a big breakthrough in the development of vdWE since they extend the utilization of vdWE to the growth of nonplanar/nonlamellar nanoarchitectures.…”

mentioning

confidence: 99%

Van der Waals Epitaxy and Photoresponse of Hexagonal Tellurium Nanoplates on Flexible Mica Sheets

et al. 2014

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Van der Waals epitaxy (vdWE) is of great interest due to its extensive applications in the synthesis of ultrathin two-dimensional (2D) layered materials. However, vdWE of nonlayered functional materials is still not very well documented. Here, although tellurium has a strong tendency to grow into one-dimensional nanoarchitecture due to its chain-like structure, we successfully realize 2D hexagonal tellurium nanoplates on flexible mica sheets via vdWE. Chemically inert mica surface is found to be crucial for the lateral growth of hexagonal tellurium nanoplates since it (1) facilitates the migration of tellurium adatoms along mica surface and (2) allows a large lattice mismatch. Furthermore, 2D tellurium hexagonal nanoplates-based photodetectors are in situ fabricated on flexible mica sheets. Efficient photoresponse is obtained even after bending the device for 100 times, indicating 2D tellurium hexagonal nanoplates-based photodetectors on mica sheets have a great application potential in flexible and wearable optoelectronic devices. We believe the fundamental understanding of vdWE effect on the growth of 2D tellurium hexagonal nanoplate can pave the way toward leveraging vdWE as a useful channel to realize the 2D geometry of other nonlayered materials.

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Epitaxial II–VI Tripod Nanocrystals: A Generalization of van der Waals Epitaxy for Nonplanar Polytypic Nanoarchitectures

Cited by 55 publications

References 66 publications

Room temperature ferromagnetism in Mn doped CdS nanowires

Room temperature ferromagnetism in Mn doped CdS nanowires

Growth mechanisms and process window for InAs V-shaped nanoscale membranes on Si[001]

Van der Waals Epitaxy and Photoresponse of Hexagonal Tellurium Nanoplates on Flexible Mica Sheets

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