Organisation/Company CNRS Department Centre de Nanosciences et de Nanotechnologies Research Field Physics Researcher Profile First Stage Researcher (R1) Country France Application Deadline 19 Jan 2025 - 00:00 (UTC) Type of Contract Temporary Job Status Full-time Hours Per Week 35 Offer Starting Date 1 Jan 2025 Is the job funded through the EU Research Framework Programme? Not funded by a EU programme Is the Job related to staff position within a Research Infrastructure? No
Offer Description We are looking for a highly motivated and talented postdoctoral researcher to join our team and contribute to an exciting project focused on the growth of semiconductor nanowires (NWs) using both chemical vapor deposition (CVD) and molecular beam epitaxy (MBE) techniques. The project leverages in-situ transmission electron microscopy (TEM) to study the growth process in real-time, providing valuable insights into nanowire growth kinetics and crystal phase control. The ultimate goal is to understand, develop, and control the fabrication of crystal-phase quantum dots within semiconductor nanowires.
The growth of III-V semiconductor nanowires (NWs) using the vapor-liquid-solid (VLS) method can result in crystal structures different from their bulk phase. In GaAs NWs, for example, stable zincblende (ZB) phase coexists with metastable wurtzite (WZ) structure, resulting in NWs having a mixed-phase structure. Remarkably, the valence and conduction bands of the two phases are misaligned so that small sections of one phase within the other effectively confine charge carriers. Controlled switching between the two phases enables the synthesis of novel heterostructures, crystal-phase quantum dots, with exceptional properties. In contrast to compositional heterojunctions, crystal-phase quantum dots have intrinsically abrupt interfaces and hence do not suffer from the alloy intermixing at the interface, which hampers precise control of the electronic properties in compositional heterostructures.
As part of this project, the recruited researcher will have the following key responsibilities: (1) Conducting in-situ TEM experiments to elucidate the growth mechanisms of nanowires. (2) Fabricating nanowires containing crystal-phase quantum dots with precise dimensions. (3) Performing ex situ characterization of the synthesized nanowires using advanced TEM, photoluminescence, and Raman spectroscopy.
The C2N laboratory, is a renowned research centre at the forefront of nanoscience and nanotechnology, jointly supported by CNRS and Université Paris-Saclay. With state-of-the-art facilities, including advanced cleanrooms, microscopy, and nanofabrication tools, C2N provides an exceptional environment for groundbreaking research. The lab fosters a multidisciplinary approach, bringing together researchers in physics, materials science, and engineering. As part of a vibrant scientific community, postdoctoral researchers will have the opportunity to engage in cutting-edge projects, collaborate with leading experts, and contribute to innovative advancements in nanotechnology.
The candidate should have:
(1) A PhD and an excellent academic record in physics, material sciences, chemistry, engineering or related fields.
(2) Experience with transmission electron microscopy (TEM) and in-situ TEM is a plus.
(3) Strong background in nanomaterial synthesis and characterization techniques.
(4) Proficiency in data analysis and the ability to work with complex experimental setups.
(5) Excellent communication skills and the ability to work independently and as a member of a research team.
(6) Previous work experience in a cleanroom environment is appreciated.
(7) A strong publication record in relevant scientific journals is an advantage.
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