Structural changes of electron and ion beam-deposited contacts in annealed carbon-based electrical devices
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ArticleAuthors
Batra, Nitin M
Patole, Shashikant P.

Abdelkader, Ahmed
Anjum, Dalaver H.

Deepak, Francis L
Da Costa, Pedro M. F. J.

KAUST Department
Electron MicroscopyImaging and Characterization Core Lab
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Date
2015-10-09Online Publication Date
2015-10-09Print Publication Date
2015-11-06Permanent link to this record
http://hdl.handle.net/10754/580007
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The use of electron and ion beam deposition to make devices containing discrete nanostructures as interconnectors is a well-known nanofabrication process. Classically, one-dimensional materials such as carbon nanotubes (CNTs) have been electrically characterized by resorting to these beam deposition methods. While much attention has been given to the interconnectors, less is known about the contacting electrodes (or leads). In particular, the structure and chemistry of the electrode–interconnector interface is a topic that deserves more attention, as it is critical to understand the device behavior. Here, the structure and chemistry of Pt electrodes, deposited either with electron or ion beams and contacted to a CNT, are analyzed before and after thermally annealing the device in a vacuum. Free-standing Pt nanorods, acting as beam-deposited electrode models, are also characterized pre- and post-annealing. Overall, the as-deposited leads contain a non-negligible amount of amorphous carbon that is consolidated, upon heating, as a partially graphitized outer shell enveloping a Pt core. This observation raises pertinent questions regarding the definition of electrode–nanostructure interfaces in electrical devices, in particular long-standing assumptions of metal-CNT contacts fabricated by direct beam deposition methods.Citation
Structural changes of electron and ion beam-deposited contacts in annealed carbon-based electrical devices 2015, 26 (44):445301 NanotechnologyPublisher
IOP PublishingJournal
NanotechnologyPubMed ID
26451669Additional Links
http://stacks.iop.org/0957-4484/26/i=44/a=445301?key=crossref.389acc58e510bbe9744026bdd3303a2eae974a485f413a2113503eed53cd6c53
10.1088/0957-4484/26/44/445301
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