A novel low-temperature growth and characterization of single crystal ZnO nanorods

Hung, Chin-Hsien; Whang, Wha–Tzong

doi:10.1016/s0254-0584(03)00331-6

Cited by 124 publications

(69 citation statements)

References 28 publications

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“…On many substrates, this can be accomplished with SAMs, but an even more straightforward approach is to seed the substrate with nanoparticles of the desired film material. We and other groups [38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55] developed seeded-growth methods that permit control over the size, population density, and spatial distribution of the crystals. Several classes of materials, such as ZnO, TiO 2 , CdS, and polymers have been studied.…”

Section: Seeded Crystal Growthmentioning

confidence: 99%

Sequential Nucleation and Growth of Complex Nanostructured Films

Sounart¹,

Li²,

Voigt³

et al. 2006

Adv Funct Materials

219

205

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Nanostructured films and coatings with controlled surface area, porosity, crystalline orientation, grain sizes, and crystal morphologies are desirable for many applications, including microelectronic devices, chemical and biological sensing and diagnosis, energy conversion and storage (photovoltaic cells, batteries and capacitors, and hydrogen-storage devices), lightemitting displays, catalysis, drug delivery, separation, and optical storage. Meeting the demands of these potential applications, however, will require reliable and economic processes for the production of a large supply of high-quality nanomaterials. Gas-phase reactions [1] have been extensively used to prepare oriented nanostructures including carbon nanotubes, [2,3] ZnO nanowires, [4,5] and many other oxide and non-oxide semiconductor materials, [6,7] but these methods typically require high temperatures (∼ 500-1100°C) and vacuum conditions, which limit the choice of substrate and the economic viability of high-volume production. These limitations have stimulated research on solution-phase synthesis (sometimes referred to as the soft solution route or chemical bath deposition), which offers the potential for low-cost, industrial-scale manufacturing. Low-temperature (typically < 100°C), aqueous-phase approaches are particularly attractive because of their low energy requirements, and safe and environmentally benign processing conditions.In aqueous-phase synthesis, oriented nanocrystalline films are deposited on a substrate in aqueous media by heterogeneous nucleation and subsequent growth. The resultant film structure is controlled by a complicated set of coupled processes in both the solution and solid phases. Heterogeneous nuclea- 335Nanostructured films with controlled architectures are desirable for many applications in optics, electronics, biology, medicine, and energy/chemical conversions. Low-temperature, aqueous chemical routes have been widely investigated for the synthesis of continuous films, and arrays of oriented nanorods and nanotubes. More recently, aqueous-phase routes have been used to produce films composed of more complex crystal structures. In this paper, we discuss recent progress in the synthesis of complex nanostructures through sequential nucleation and growth processes. We first review the use of multistage, seeded-growth methods to synthesize a wide range of nanostructures, including oriented nanowires, nanotubes, and nanoneedles, as well as laminated films, columns, and multilayer heterostructures. We then describe more recent work on the application of sequential nucleation and growth to the systematic assembly of large arrays of hierarchical, complex, oriented, and ordered crystal architectures. The multistage aqueous chemical route is shown to be applicable to several technologically important materials, and therefore may play a key role in advancing complex nanomaterials into applications.-[*] Dr.

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Section: Seeded Crystal Growthmentioning

confidence: 99%

Sequential Nucleation and Growth of Complex Nanostructured Films

Sounart¹,

Li²,

Voigt³

et al. 2006

Adv Funct Materials

219

205

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“…[9] However, the high-temperature methods are unfavourable because of high energy consumption. In contrast to these processes, the solution-based route has recently stimulated wide interest [10][11][12][13] because of the low temperatures needed and the large-scale production of nanocrystalline ZnO. Electrochemical methods have also been employed in the synthesis of ZnO nanoparticles or films.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Synthesis of ZnO Nanoparticles

Starowicz

Stypuła

2008

Eur J Inorg Chem

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The anodic behaviour of zinc was investigated in ethanol solution containing LiCl and water. Zinc was polarised by using cyclic voltammetry and chronoamperometry techniques. During the course of the dissolution of zinc, a colloidal suspension of ZnO nanoparticles was obtained in 0.1 M LiCl/ethanol solutions that contain H 2 O. The suspension is formed only if water is present, and the rate of the process depends on the water content. Moreover, the concentration

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“…This is an important feature for increasing the efficiency of future devices based on these kinds of nanomaterials [81]. Vertically oriented ZnO nanowires have good optoelectronic properties [18,82], and thus they have been studied for the construction of light-emitting diodes and solar cells [83], including p-n junctions, dye-sensitized solar cells (DSC), and most recently for water splitting devices [84]. In addition, the piezoelectric and semiconducting properties of ZnO lead to possible applications as light, pH, and gas-sensing element [85][86][87], as well as to the construction of energy nanogenerators, as recently demonstrated by Wang and coworkers [17,54].…”

Section: Nanorods Nanowires and Nanotubes: Properties And Applicationsmentioning

confidence: 99%