PhD position in materials science

普渡哥

DescriptionElectronic properties of chemically modified surfaces and nanostructured materials
We are seeking a highly motivated PhD candidate interested in working on the development of methods for tailoring the electronic properties of surfaces and nanomaterials via chemical modification. Adsorption or covalent attachment of polar molecules to a surface can lead to large changes in electronic properties. Learning how to control electrical properties through surface chemistry is expected to enable novel hybrid organic/inorganic sensors and electronic devices.

Funding is available for a student to work on one of two possible projects;
A)   Molecular gating of transport on silicon surfaces and nanowires
This project builds on our recent observation of adsorbate induced conductivity modulation on chemically modified silicon substrates (Chem. Comm. 20011, 47, 10593). We have also demonstrated that silicon on insulator (SOI) is a sensitive platform for observing the consequences of adsorption and reaction events on electrical transport. Going forward we aim to systematically investigate the ability to tune the conductivity of SOI substrates via the formation of covalently attached molecular monolayers with a range of substituents of electron withdrawing and donating character. Studies of molecular gating effects on SOI substrates will be extended to silicon nanowire networks.
B)   Chemical modification and electronic properties of graphene
Graphene has attracted considerable recent attention due both to the interesting physics of charge carriers in this unique material as well as its many potential applications in nanoelectronics, sensors and energy storage. Consisting of a single sheet of sp² bonded carbon atoms it is a truly two-dimensional material (“all surface”) and thus ideally suited to demonstrate tuning of electronic properties through chemical modification. Chemical modification of graphene will be investigated with ultrahigh vacuum scanning tunneling microscopy and high resolution electron energy loss spectroscopy. Chemically induced changes in electronic properties will be examined by surface potential and electrical transport measurements. Learning to control the surface chemistry of graphene is seen to be a key enabling step in realizing envisaged applications in sensing and electronics.

The student will be enrolled in the PhD program at INRS-EMT in Varennes and jointly supervised by Prof. Federico Rosei (INRS-EMT) and Dr. Gregory Lopinski at the National Research Council (Ottawa). The bulk of the experimental work will be carried out in the Nanoscale Measurement Group at the NRC Sussex Drive Laboratories in Ottawa. Our labs are well-equipped with a range of facilities for preparing and characterizing surfaces in both ambient and ultrahigh vacuum environments.
To apply For more information, contact Dr. Gregory Lopinski (gregory.lopinski@nrc-cnrc.gc.ca).
INRS traditionally grants direct-entry to PhD programs only to students with masters degrees.  However, applicants with appropriate bachelor degree are encouraged to apply, with the understanding that they will initially register as masters students, and will transfer to the PhD program after sufficient progress has been made.

shepherd517

提起固体物理就头疼的路过