Controllable density of aligned zinc oxide nanorod arrays by molarities variation

Muhamad, Salina; Rahman, Nor Farahaida Abdul; Bakar, Suriani Abu; Mamat, M. H.; Rusop, M.

doi:10.1109/shuser.2012.6268810

Cited by 2 publications

(5 citation statements)

References 8 publications

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“…Vayssieres' claim of a linear relation of the solution concentration to rod width is disputed by a few researchers. Both Guo et al [31] and Muhamad et al [32] showed non-linear relations of solution concentration to rod width. In addition, Xu et al [33] showed that with increasing solution concentration the density increases.…”

Section: Fabricationmentioning

confidence: 98%

“…[11,40],zinc acetate [11], and zinc sulfate [11,34]. The common additives used are hexamethylenetetramine (HMT,HMTA) [11,[28][29][30][31][32][33]35,37,39,58], ethylenediamine (en) [11], ammonium hydroxide [36,38]. Govender et al [11] performed a comprehensive study on the effects of different zinc sources and additives, showing that different solutions generate different formations, see Table 2.…”

Section: Fabricationmentioning

confidence: 99%

“…In some cases ZnO is even being looked at as an alternative for indium tin oxide (ITO), because it is cheaper and more readily found [4,[25][26]. ZnO is also deposited using a variety of methods such as spray pyrolysis [4], pulsed laser deposition (PLD) [13], chemical vapor deposition (CVD) [27], rf magnetron sputtering [9,12], aqueous solution [11,[28][29][30][31][32][33][34][35][36][37][38][39][40], and sol-gel process [5,25,26,[41][42][43][44][45][46][47][48][49][50][51].…”

Section: Introductionmentioning

confidence: 99%

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Towards Direct Fabrication of Functional Patterns on Large-Area Substrates for Flexible Devices

Cronin¹

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Nowadays there is a growing interest to develop flexible devices that can be used in applications spanning from displays to energy harvesting. This is due to the potential of such devices to be integrated onto various-shaped surfaces and also to be roll-to-roll processed. However, there are still a few challenges to be tackled before their full commercialization. In particular, the direct fabrication of micro/nano-scale functional features on a large-area flexible substrate remains a critical challenge. This is because it requires both low temperature processing and precise control of the feature size. Kathy Sabolsky for all her help in the laboratory and demonstrating how to operate different equipment. Nick Morris for his help in the laboratory, taking SEM images and performing XRD. As well as our discussions about ZnO structures and piezoelectric devices. Undergraduates, Jacob Cordonier and Dillon Carden for their lab work. Finally, Katie and my parents, David and Marian, for all their loving support.

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Section: Fabricationmentioning

confidence: 98%

Section: Fabricationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Towards Direct Fabrication of Functional Patterns on Large-Area Substrates for Flexible Devices

Cronin¹

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“…ZnO films are used in a variety of electrical device applications, which include sensors [54], solar cells [2,55], and energy scavenging devices [50,56]. Films can be deposited using pulsed laser deposition (PLD) [2,14,57], chemical vapor deposition (CVD) [58], DC magnetron sputtering [38,54], RF magnetron sputtering [12,13,59], aqueous solution [56,60] [75,25], and ZnSO 4 [60]. [77] found that the diameters of nanowires more than doubled when decreasing the temperature from 98°C to 92°C.…”

Section: Zinc Oxide Filmsmentioning

confidence: 99%

“…Growth of the ZnO nanostructures was carried out using the aqueous chemical assisted cites, and therefore a higher density of ZnO nanowires. [60,75]. As the solution molarity which is further increased to 0.05 mM, resulting nanowires exhibited both poor morphology and alignment attributed to their high nucleation and coalescence of nanowires early in the growth.…”

Section: Zno Nanowire Growth and Characterizationmentioning

confidence: 99%

Tribo-Mechanical Investigation of the Functional Components used in Flexible Energy Harvesting Devices

Morris¹

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During the previous decade, the development of energy harvesting devices based on piezoelectric materials has garnered great interest. The ability to capture ambient mechanical energy and convert it to useable electricity is a potential solution to the ever-growing energy crisis. One of the most attractive functional materials used in these devices is zinc oxide (ZnO). This material's relative low cost and ease of large-area processing has spurred numerous device designs based around it. The ability to grow ZnO nanostructures of various geometries with lowtemperature chemical methods makes this material even more attractive for flexible devices. Although numerous device architectures have been developed, the long-term mechanical reliability has not been addressed. This work focuses on the fabrication and mechanical failure analysis of the flexible components typically used in piezoelectric energy harvesting devices. A three-phase iterative design process was used to fabricate prototypical piezoelectric nanogenerators, based on ZnO nanowires. An output of several millivolts was achieved under normal contact and microtensile loading, but device failure occurred after only a few loading cycles, in all cases. Ex situ failure analysis confirmed the primary sources of failure, which became the focus of further, component-level studies. Failure was primarily seen in the flexible electrodes of the nanogenerating devices, but was also observed in the functional piezoelectric layer itself.

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Controllable density of aligned zinc oxide nanorod arrays by molarities variation

Cited by 2 publications

References 8 publications

Towards Direct Fabrication of Functional Patterns on Large-Area Substrates for Flexible Devices

Towards Direct Fabrication of Functional Patterns on Large-Area Substrates for Flexible Devices

Tribo-Mechanical Investigation of the Functional Components used in Flexible Energy Harvesting Devices

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