Oriented attachment (OA) mediated characteristic growth of Gd2O3 nanorods from nanoparticle seeds

Hazarika, Samiran; Mohanta, Dambarudhar

doi:10.1016/s1002-0721(16)60009-1

Cited by 19 publications

(8 citation statements)

References 39 publications

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“…As the orifice is limited in size, it creates a bottleneck formation and localized increased pressure. The increased pressure allows further growth of new nanocrystals on a local scale and increased fusion of crystals through oriented attachment due to the locally increased imputed energy [ 46 , 62 , 63 ]. This is considered to be a crucial moment that decides the form of the whisker growth.…”

Section: Resultsmentioning

confidence: 99%

Extraordinary Nanocrystalline Pb Whisker Growth from Bi-Mg-Pb Pools in Aluminum Alloy 6026 Moderated through Oriented Attachment

et al. 2021

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The elucidation of spontaneous growth of metal whiskers from metal surfaces is still ongoing, with the mainstream research conducted on Sn whiskers. This work reports on the discovery of Pb whisker growth from Bi-Mg-Pb solid pools found in common machinable aluminum alloy. The whiskers and hillocks display unique morphologies and complex growth that have not been documented beforehand. In contrast to typical understanding of whisker growth, the presented Pb whiskers show a clear nanocrystalline induced growth mechanism, which is a novel concept. Furthermore, the investigated whiskers are also found to be completely composed of nanocrystals throughout their entire length. The performed research gives new insight into nucleation and growth of metal whiskers, which raises new theoretical questions and challenges current theories of spontaneous metal whisker growth. Additionally, this work provides the first microscopic confirmation of recrystallization growth theory of whiskers that relates to oriented attachment of nanocrystals formed within an amorphous metallic matrix. The impact of mechanical stress, generated through Bi oxidation within the pools, is theoretically discussed with relation to the observed whisker and hillock growth. The newly discovered nanocrystalline growth provides a new step towards understanding spontaneous metal whisker growth and possibility of developing nanostructures for potential usage in sensing and electronics applications.

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Section: Resultsmentioning

confidence: 99%

Extraordinary Nanocrystalline Pb Whisker Growth from Bi-Mg-Pb Pools in Aluminum Alloy 6026 Moderated through Oriented Attachment

et al. 2021

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“…These state of the art of OA-based nanostructures show that all the existing kinetic studies have been performed based on the nanoparticle's diameter growth using the modified Smoluchowski equation. In addition, two reports have attempted to explain the kinetic rate for the elongation of 1 D nanorods by considering dipole attraction for their alignment [77,84]. The in-depth understanding of the kinetics of crystal growth mechanisms for the fabrication of 1 D nanostructures is still in its preliminary stage although there is rapid progress in fabricating semiconductor nanowires.…”

Section: Crystal Growth Kinetic Models and Prior Artsmentioning

confidence: 99%

“…Ligand free (water) "1 + 1" mixed OA + OR 2003 [72] Nano ZnS Mercaptoethanol "1 + 1" sequential OA + OR 2003 [70] Nano ZnS NaOH "i + j" sequential OA + OR 2006 [66], 2007 [73] Thiol-capped PbS NPs Ligand free (water) "i + j" OA and "1 + 1" OA + OR 2007 [74] SnO 2 NPs Ligand free (water) "i + j" OA 2006 [75], 2009 [76] CdS nanorods Amine "i + j" OA 2010 [77] TiO 2 anatase NPs Succinic acid "1 + 1" OA, shrinkage, and OR 2010 [78] TGA-capped CdTe NPs Ligand free (water) "1 + 1" mixed OA + OR 2011 [79] ZnO QDs Ethanol "1 + 1" sequential OA + OR 2012 [80] CdS QDs TGA "1 + 1" mixed OA + OR 2013 [81] CdTe QDs Mercaptopropionic acid "1 + 1" mixed OA + OR 2014 [82] Co 2 FeO 4 Polypeptide (c25-mms6) "1 + 1" sequential OA + OR 2014 [83] Gd 2 O 3 nanorods Ligand free (water) "1 + 1" OA 2016 [84] ZnO QDs Ligand free (water) "1 + 1" mixed OA + OR 2019 [85] Table 1.…”

Section: Nano Znsmentioning

confidence: 99%

Ultrathin Metal Hydroxide/Oxide Nanowires: Crystal Growth, Self-Assembly, and Fabrication for Optoelectronic Applications

Pathiraja¹,

Rathnayake²

2022

21st Century Nanostructured Materials - Physics, Chemistry, Classification, and Emerging Applications in Industry, Biomedicine,

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The fundamental understanding of transition metal oxides nanowires’ crystal growth to control their anisotropy is critical for their applications in miniature devices. However, such studies are still in the premature stage. From an industrial point of view, the most exciting and challenging area of devices today is having the balance between the performance and the cost. Accordingly, it is essential to pay attention to the controlled cost-effective and greener synthesis of ultrathin TMOS NWs for industrial optoelectronic applications. This chapter provides a comprehensive summary of fundamental principles on the preperation methods to make dimensionality controlled anisotropic nanowires, their crystal growth studies, and optical and electrical properties. The chapter particularly addresses the governing theories of crystal growth processes and kinetics that controls the anisotropy and dimensions of nanowires. Focusing on the oriented attachment (OA) mechanism, the chapter describes the OA mechanism, nanocrystal’s self-assembly, interparticle interactions, and OA-directed crystal growth to improve the state-of-the art kinetic models. Finally, we provide the future perspective of ultrathin TMOS NWs by addressing their current challenges in optoelectronic applications. It is our understanding that the dimension, and single crystallinity of nanowires are the main contributors for building all functional properties, which arise from quasi-1-D confinement of nanowire growth.

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“…3 Procedure of single diamond eptaxial growth on Ir substrate [16,[60][61][62][63][64] 图 4 利用二次电子探测器观测到的 SEM 照片 [72] (a) BEN 过程后铱衬底表面形貌; (b) BEN 过程后铱衬底局部表面形貌; (c)生长过程后同一位置形貌 Fig. 4 SEM images [72] of the iridium surface after BEN treatment (a), local spots after BEN (b) and after a subsequent growth step (c) 程即新金刚石晶核与形核阶段金刚石晶核的连接与晶体尺寸增加过程。比较常见的晶体材料的生长机制有奥斯特瓦尔德熟化(Ostwald Ripening, OR) [73] 、定向附着生长 (Oriented Attachment, OA) [74] 和柯肯达尔效应 (Kirkendall Effect, KE) [75] 等。定向附着生长是团簇沿着特定的晶向聚集并最终形成单晶或孪晶的过程, 具有非随机性 [76] 。由于金刚石在 Ir 衬底上较高的形核密度, 金刚石生长的最初阶段更倾向于 OA 生长机制, 可以认为定向附着生长即为金刚石缓慢生长阶段的微观机理。 Li 等 [77] 首次利用透射电子显微镜观测到液体中晶粒的定向附着生长过程, 如图 5 所示。 Dong 等 [69] 在外延薄膜中观测到薄膜和过渡层晶粒的拓扑衍生定向附着生长现象, 如图 3(c1)所示。Dideikin 等 [78] 以爆轰法制备的纳米金刚石为原料, 在高温高压条件下, 纳米金刚石颗粒相接触并发生倾斜、旋转, 每两个颗粒的相同晶面通过悬挂键相连接, 最终形成 1.5 μm 的单晶金刚石颗粒, 从而验证了固体颗粒之间的定向附着生长机制。但是对于金刚石在形核生长过程中的原位过程还缺少相应的研究仪器和研究方法, 以至于金刚石的生长过程难以通过直观的方法进行观测。定向附着生长过程中, 晶界湮没形成金刚石单晶是小角度晶界形成的楔形向错所导致的。图 3(c2) 为立方晶中的小角晶界及部分形成楔形向错的结构示意图, 楔形向错对应于一个不完整的倾斜晶界 [70] 。可以推出晶粒尺寸 R 和晶界转变为楔形向错的临界角 ω crit 之间的关系为 [32] :…”

Section: 金刚石的生长过程unclassified

Heteroepitaxial Growth of Single Crystal Diamond Films on Iridium: Procedure and Mechanism

Zhu¹,

Zhong-Bo²,

Dai³

2019

Journal of Inorganic Materials

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Due to its unique physical and chemical property, diamond is widely used in many fields such as detectors and optoelectronic devices. Many scholars' attention is drew into single crystal diamond because of its potential to significantly increase the functionality of these devices. Presently, single crystal diamonds grown heteroepitaxially on iridium (Ir) substrates reach the largest size and an excellent growth quality. In this paper, substrates with different structures for nucleation and growth processes of epitaxial diamond are introduced. The mechanisms of diamond nucleation by Bias Enhanced Nucleation (BEN) method and growth undergoing an Epitaxial Lateral Overgrowth (ELO) process are described, including technique of Patterned Nucleation and Growth(PNG). Limitations of current study are pointed out, and the future development of heteroepitaxial theory and experiment are also forecasted in this paper.

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Oriented attachment (OA) mediated characteristic growth of Gd2O3 nanorods from nanoparticle seeds

Cited by 19 publications

References 39 publications

Extraordinary Nanocrystalline Pb Whisker Growth from Bi-Mg-Pb Pools in Aluminum Alloy 6026 Moderated through Oriented Attachment

Extraordinary Nanocrystalline Pb Whisker Growth from Bi-Mg-Pb Pools in Aluminum Alloy 6026 Moderated through Oriented Attachment

Ultrathin Metal Hydroxide/Oxide Nanowires: Crystal Growth, Self-Assembly, and Fabrication for Optoelectronic Applications

Heteroepitaxial Growth of Single Crystal Diamond Films on Iridium: Procedure and Mechanism

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