https://scholars.lib.ntu.edu.tw/handle/123456789/616395
標題: | Growth of single-crystalline wurtzite aluminum nitride nanotips with a self-selective apex angle | 作者: | Shi S.-C. Chen C.-F. Chattopadhyay S. Lan Z.-H. Chen K.-H. Chen L.-C. LI-CHYONG CHEN |
公開日期: | 2005 | 卷: | 15 | 期: | 5 | 起(迄)頁: | 781-786 | 來源出版物: | Advanced Functional Materials | 摘要: | Single-crystalline, hexagonal aluminum nitride nanotips are fabricated using a vapor-transport and condensation process (VTCP) on silicon substrates with or without a catalyst layer. The resultant tips have very sharp nanoscale apexes (∼1 nm), while their bases and lengths are up to hundreds of nanometers wide and several micrometers long, respectively. It has been demonstrated that the thickness of the gold-catalyst layer plays a critical role in controlling the size of the tip; in addition, a catalyst-free growth mode has been observed, which results in lesser control over the nanotip morphology. Nevertheless, a remarkably narrow distribution of the apex angle of the nanotips, regardless of whether or not a catalyst was used in the VTCP, has been obtained. Compared with the commonly observed ridge and pyramid structures, the nanotips produced by VTCP have higher angles (∼81°) between the tilted (221) and the basal (001) planes that encase it. A mechanism for this self-selective apex angle in aluminum nitride nanotip growth is proposed. © 2005 WILEY-VCH Verlag GmbH KGaA, KGaA, Weinheim. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-18744403431&doi=10.1002%2fadfm.200400324&partnerID=40&md5=e17fdc158d1d4cf94082303369920cb9 https://scholars.lib.ntu.edu.tw/handle/123456789/616395 |
ISSN: | 1616301X | DOI: | 10.1002/adfm.200400324 | SDG/關鍵字: | Catalysts;Condensation;Crystal growth;Fabrication;Gold;Nanostructured materials;Scanning electron microscopy;Silicon compounds;Single crystals;Transmission electron microscopy;Vaporization;X ray diffraction analysis;Apex angles;Nanometers;Nanorods;Nanotips;Aluminum nitride |
顯示於: | 凝態科學研究中心 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。