Projects per year
Personal profile
Research profile
My research centers around studying the growth of ultra-thin films by atomic-layer deposition and their characterization using advanced (nonlinear) optical diagnostics with an emphasis on their defects and non-idealities.
Academic background
Currently I am focussing on the growth and characterization of 2D transition metal dichalcogenides (TMDs). This included the development of new ALD processes but also the further development of (advanced) diagnostics for these materials. Recently, I developed a new framework for texture characterization using Raman spectroscopy based upon new fundamental insight I obtained into the Raman response of nanocrystalline TMDs.
My PhD research encompassed mechanistic studies of the prototypical ALD processes for metal-oxide (thermal ALD of Al2O3) and for noble metal ALD (thermal ALD of Pt) using a new diagnostic: broadband sum-frequency generation (BB-SFG) spectroscopy. The surface chemistry during these processes was studied for the first time with this state-of-the-art technique which relies on the mixing of mid-IR and visible fs laser pulses. As such, SFG is a second-order nonlinear optical process making BB-SFG spectroscopy inherently surface sensitive. This property, combined with the all optical nature of BB-SFG, makes it ideally suited for in-situ studies of the surface chemistry. A purpose built setup was realized in the project and these BB-SFG studies revealed several key non-idealities in the growth mechanism of these well-studied prototypical ALD processes.
I also studied the surface chemistry of plasma-enhanced ALD of Al2O3 using ATR-FTIR spectroscopy at the Colorado School of Mines (CSM) and I worked on the characterization of the SiO2/Si and Al2O3/Si interface relevant for nano-electronic and photovoltaic devices with phase-sensitive second-harmonic generation (SHG) spectroscopy. In conjunction with probing the electronic structure of the interface, SHG can also reveal and quantify the presence of built-in charges near these interfaces which is a key property for device fabrication.
Expertise related to UN Sustainable Development Goals
In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This person’s work contributes towards the following SDG(s):
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Projects
- 1 Finished
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3DAM
Kessels, W. M. M., Vandalon, V., van Bommel, C., Shirazi, M., Faraz, T. & Schulpen, J. J. P. M.
1/04/16 → 1/04/19
Project: Research direct
Research output
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Common Precursors and Surface Mechanisms for Atomic Layer Deposition
Barry, S. T., Gordon, P. G. & Vandalon, V., 29 Jan 2022, (Accepted/In press) Reference Module in Chemistry, Molecular Sciences and Chemical Engineering. Elsevier, 18 p.Research output: Chapter in Book/Report/Conference proceeding › Entry for encyclopedia/dictionary › Academic › peer-review
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Controlling transition metal atomic ordering in two-dimensional Mo1- xW xS2alloys
Schulpen, J. J. P. M., Verheijen, M. A., Kessels, W. M. M., Vandalon, V. & Bol, A. A., Apr 2022, In: 2D Materials. 9, 2, 025016.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile7 Downloads (Pure) -
Surface chemistry during Atomic Layer Deposition of Pt studied with vibrational sum-frequency generation
Vandalon, V., Mackus, A. J. M. & Kessels, W. M. M., 10 Feb 2022, In: Journal of Physical Chemistry C. 126, 5, p. 2463-2474 12 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile8 Downloads (Pure) -
Atmospheric-Pressure Plasma-Enhanced Spatial ALD of SiO2 Studied by Gas-Phase Infrared and Optical Emission Spectroscopy
Mione, M. A., Vandalon, V., Mameli, A., Kessels, W. M. M. & Roozeboom, F., 18 Nov 2021, In: Journal of Physical Chemistry C. 125, 45, p. 24945-24957 13 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile17 Downloads (Pure) -
Atomic insights into the oxygen incorporation in atomic layer deposited conductive nitrides and its mitigation by energetic ions
Karwal, S., Karasulu, B., Knoops, H. C. M., Vandalon, V., Kessels, W. M. M. & Creatore, M., 14 Jun 2021, In: Nanoscale. 13, 22, p. 10092-10099 8 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile1 Citation (Scopus)11 Downloads (Pure)
Prizes
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Student Award best oral presentation
Vandalon, Vincent (Recipient), 30 Jun 2015
Prize: Other › Career, activity or publication related prizes (lifetime, best paper, poster etc.) › Scientific
Thesis
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Second-Harmonic Generation: spectroscopic phase and intensity study of the Si(100) interface with SiO2 and Al2O3 thin films
Author: Vandalon, V., 31 Aug 2011Supervisor: Terlinden, N. M. (Supervisor 1) & Kessels, W. M. M. (Supervisor 2)
Student thesis: Master
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