Tailoring the nanoscale morphology of HKUST-1 thin films via codeposition and seeded growth

被引:9
作者
Brower, Landon J. [1 ]
Gentry, Lauren K. [1 ]
Napier, Amanda L. [1 ]
Anderson, Mary E. [1 ]
机构
[1] Hope Coll, Dept Chem, Holland, MI 49422 USA
来源
BEILSTEIN JOURNAL OF NANOTECHNOLOGY | 2017年 / 8卷
基金
美国国家科学基金会;
关键词
atomic force microscopy; copper(II) 1,3,5-benzenetricarboxylate; ellipsometry; surface-anchored metal-organic frameworks; METAL-ORGANIC FRAMEWORKS; ATOMIC-FORCE MICROSCOPY; LIQUID-PHASE EPITAXY; BY-STEP ROUTE; ORIENTED GROWTH; DEPOSITION; FUNDAMENTALS; LITHOGRAPHY; NUCLEATION; MONOLAYERS;
D O I
10.3762/bjnano.8.230
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Integration of surface-anchored metal-organic frameworks (surMOFs) within hierarchical architectures is necessary for potential sensing, electronic, optical, or separation applications. It is important to understand the fundamentals of film formation for these surMOFs in order to develop strategies for their incorporation with nanoscale control over lateral and vertical dimensions. This research identified processing parameters to control the film morphology for surMOFs of HKUST-1 fabricated by codeposition and seeded deposition. Time and temperature were investigated to observe film formation, to control film thickness, and to tune morphology. Film thickness was investigated by ellipsometry, while film structure and film roughness were characterized by atomic force microscopy. Films formed via codeposition resulted in nanocrystallites anchored to the gold substrate. A dynamic process at the interface was observed with a low density of large particulates (above 100 nm) initially forming on the substrate; and over time these particulates were slowly replaced by the prevalence of smaller crystallites (ca. 10 nm) covering the substrate at a high density. Elevated temperature was found to expedite the growth process to obtain the full range of surface morphologies with reasonable processing times. Seed crystals formed by the codeposition method were stable and nucleated growth throughout a subsequent layer-by-layer deposition process. These seed crystals templated the final film structure and tailor the features in lateral and vertical directions. Using codeposition and seeded growth, different surface morphologies with controllable nanoscale dimensions can be designed and fabricated for integration of MOF systems directly into device architectures and sensor platforms.
引用
收藏
页码:2307 / 2314
页数:8
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