Facile fabrication of morphology-tunable SnO  nanostructures by catalyst-free growth

Jin, Changhyun; Park, Sung-Sik; Kim, Chang-Wan; Choi, Myung–Seok; Lee, Chongmu

doi:10.1016/j.matlet.2015.05.040

Cited by 3 publications

(5 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 2b)a nd branch oc-casionally,a sa lso reported by Jin et al for catalyst-free growth. [5] In the centreo ft he catalytic tip is ad ark spot, which is roughlyt he size of as ingle Au nanoparticle or ac luster of several nanoparticles, indicative of VLS growth.W hereas most of the nanostructures are composed of SnO 2 ,asmall fraction of pure Sn is also found (see high resolution image of the tip area in Figure 2c). The growth directiono ft his short wire is [200],c onsistent with Sn nanowire growth.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

One‐Step SnO₂ Nanotree Growth

Schönherr

Hesjedal

2016

Chemistry A European J

View full text Add to dashboard Cite

A comparison between Au, TiO2 and self‐catalysed growth of SnO2 nanostructures using chemical vapour deposition is reported. TiO2 enables growth of a nanonetwork of SnO2, whereas self‐catalysed growth results in nanoclusters. Using Au catalyst, single‐crystalline SnO2 nanowire trees can be grown in a one‐step process. Two types of trees are identified that differ in size, presence of a catalytic tip, and degree of branching. The growth mechanism of these nanotrees is based on branch‐splitting and self‐seeding by the catalytic tip, facilitating at least three levels of branching, namely trunk, branch and leaf.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The most economical methodt of abricate such structures is chemicalv apour transport. [5] This method employs ac atalysed growth process in which nanowires are seeded by Au nanoparticles. [6] Branches are typicallya dded by multi-step catalyst seeding.…”

mentioning

confidence: 99%

One‐Step SnO₂ Nanotree Growth

Schönherr

Hesjedal

2016

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…The preparation procedure for different-sized and -shaped SiO x structures is closely analogous to that of our previous report [36], even though the final products are completely different from each other (i.e. SnO 2 and SiO x ).…”

Section: Resultsmentioning

confidence: 86%

“…Various SiO x micro/nano structures were synthesized using a somewhat modified thermal evaporation technique based on pre-deposited SnO 2 thin films. The deposition process of SnO 2 film onto an alumina tube without a Si substrate follows the procedure described in a previous report [36]. To enhance the amount of Sn atoms through the carboreduction effect [37] of SnO 2 , the same process was repeated up to ten times.…”

Section: Methodsmentioning

confidence: 99%

Design and synthesis of amorphous SiO_xstructures generated by Sn quantum dots: growth mechanism and luminescent origin

et al. 2016

Self Cite

View full text Add to dashboard Cite

SiOx structures with different diameters of a few hundreds of nanometers and/or a few micrometers are prepared using applied thermal evaporation. Subsequently, Sn quantum dot-based SiOx architectures are synthesized via the continuous steps of the carbothermal reduction of SnO2, substitution of Sn(4+) for In(3+), thermal oxidation of Si, Sn sublimation, interfacial reaction, and diffusion reaction consistent with corresponding phase equilibriums. Several crystalline and spherical-shaped Sn quantum dots with diameters between 2 and 7 nm are observed in the amorphous SiOx structures. The morphological evolution, including hollow Sn (or SnOx) sphere and wire-like, worm-like, tube-like, and flower-like SiOx, occurs stepwise on the Si substrate upon increasing the given process energies. The optical characteristics based on confocal measurements reveal the as-synthesized SiOx structures, irrespective of whether crystallinity is formed, which all have visible-range emissions originating from the numerous different-sized and -shaped Sn quantum dots permeating into the SiOx matrix. In addition, photoluminescence emissions ranging between ultraviolet and red regions are in agreement with confocal measurements. The origins of the morphology- and luminescence-controlled amorphous SiOx with Sn quantum dots are also discussed.

show abstract

“…Preformed SnO 2 thick films may be able to provide the embedment of minute Sn nanoparticles into SiO x tubes due to the carbothermal reductive dissociation of SnO 2 for SnO and Sn over 1050 °C 28 . In our previous paper, we presented the growth factor and process variables for SnO 2 film, as no specific substrate, onto the surface of alumina tubes 53 . The same procedure was repeated up to 10 times to supply the satisfactory amount Sn nanoparticles.…”

Section: Methodsmentioning

confidence: 99%

Growth Mechanism and Luminescent Properties of Amorphous SiOx Structures via Phase Equilibrium in Binary System

Jin

Hwang

Cho

et al. 2016

Sci Rep

Self Cite

View full text Add to dashboard Cite

Balloon whisk-like and flower-like SiOx tubes with well-dispersed Sn and joining countless SiOx loops together induce intense luminescence characteristics in substrate materials. Our synthetic technique called “direct substrate growth” is based on pre-contamination of the surroundings without the intended catalyst and source powders. The kind of supporting material and pressure of the inlet gases determine a series of differently functionalized tube loops, i.e., the number, length, thickness, and cylindrical profile. SiOx tube loops commonly twist and split to best suppress the total energy. Photoluminescence and confocal laser measurements based on quantum confinement effect of the embedded Sn nanoparticles in the SiOx tube found substantially intense emissions throughout the visible range. These new concepts related to the synthetic approach, pre-pollution, transitional morphology, and permeable nanoparticles should facilitate progress in nanoscience with regard to tuning the dimensions of micro-/nanostructure preparations and the functionalization of customized applications.

show abstract

Facile fabrication of morphology-tunable SnO nanostructures by catalyst-free growth

Cited by 3 publications

References 19 publications

One‐Step SnO₂ Nanotree Growth

One‐Step SnO₂ Nanotree Growth

Design and synthesis of amorphous SiO_xstructures generated by Sn quantum dots: growth mechanism and luminescent origin

Growth Mechanism and Luminescent Properties of Amorphous SiOx Structures via Phase Equilibrium in Binary System

Contact Info

Product

Resources

About

Facile fabrication of morphology-tunable SnO nanostructures by catalyst-free growth

Cited by 3 publications

References 19 publications

One‐Step SnO2 Nanotree Growth

One‐Step SnO2 Nanotree Growth

Design and synthesis of amorphous SiOxstructures generated by Sn quantum dots: growth mechanism and luminescent origin

Growth Mechanism and Luminescent Properties of Amorphous SiOx Structures via Phase Equilibrium in Binary System

Contact Info

Product

Resources

About

One‐Step SnO₂ Nanotree Growth

One‐Step SnO₂ Nanotree Growth

Design and synthesis of amorphous SiO_xstructures generated by Sn quantum dots: growth mechanism and luminescent origin