Nanoscale Strain Engineering on the Surface of a Bulk TiO2 Crystal

Arrays of highly strained 5–25 nm-wide regions have been prepared on rutile TiO2(110) surface through a low energy Ar ion bombardment technique. Using scanning tunneling microscopy (STM) and an innovative STM tip-triggered nanoexplosion approach we show experimentally that the protrusions arise from...

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Veröffentlicht in:	Nano letters 2014-11, Vol.14 (11), p.6185-6189
Hauptverfasser:	Potapenko, Denis V, Li, Zhisheng, Kysar, Jeffery W, Osgood, Richard M
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: structure, mechanical and thermal properties Exact sciences and technology Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties Mechanical and acoustical properties of condensed matter Mechanical properties of nanoscale materials Nanocrystalline materials Physics Radiation effects on specific materials Structure of solids and liquids crystallography Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties)
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Beschreibung
Zusammenfassung:	Arrays of highly strained 5–25 nm-wide regions have been prepared on rutile TiO2(110) surface through a low energy Ar ion bombardment technique. Using scanning tunneling microscopy (STM) and an innovative STM tip-triggered nanoexplosion approach we show experimentally that the protrusions arise from subsurface Ar-filled pockets. Continuum mechanics modeling gives good estimates of the corresponding elastic deformation. Surface strain values of up to 4% have been deduced.
ISSN:	1530-6984 1530-6992
DOI:	10.1021/nl5024194