Laetitia Dalstein est membre de l’équipe Photonique et matériaux et de la thématique PULS.

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Hi! I am Laetitia Dalstein, and I am currently a researcher at the Laboratoire Ondes et Matiére d’Aquitaine (LOMA), Université de Bordeaux, in Bordeaux, France.
I work on aqueous interfaces studied by nonlinear optics.
I have developed new optical setups to determine the water structure at the interface in the presence of ions. Now, the aim of my project is to use Terahertz field to induce the water structure modifications and follow them with the optical techniques.
This topic is funded by a Marie Skłodowska-Curie Individual Fellowship and we are collaborating with Taiwan.

Curriculum vitae

Curriculum vitae

Employment history

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September 2020 – December 2022
Marie Sklodowska-Curie Fellow- Project SAInTz
University of Bordeaux, Laboratoire Ondes et Matière d’Aquitaine
Bordeaux,France

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December 2019 – June 2020
Postdoctoral Fellow
Visiting at University of Bordeaux, Laboratoire Ondes et Matière d’Aquitaine
Bordeaux,France

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February 2018 – June 2020
Postdoctoral Fellow
Insitute of Physics, Academia Sinica
Taipei, Taiwan

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January 2016 – January 2018
Postdoctoral Fellow
Division of Surface and Corrosion Science, KTH Royal Institute of Technology
Stockholm, Sweden

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October 2012 – December 2015
PhD student
Laboratoire de Chimie Physique, Université Paris Saclay
Orsay, France

Education

09/2011-07/2012
Paris-Sud University, France
Preparatory courses for French state exam in order to graduate as a Chemical and Physical science school teacher

“Certifiée” in 2012 and “Agrégée” in Science in 2013 (Physics and Chemistry)

09/2010-07/2011
Master’s Degree in Optics, with honors, Institut d’Optique LCFIO, France
Orsay Fundamental Physics Magistere, Paris-Sud University, France

03/2011-07/2011
Master’s candidate advised by Dr. Bertrand Busson, Laboratoire de Chimie Physique d’Orsay, Paris-Sud University, France
• Investigated the possible enhancement of 2Colors-Sum Frequency Generation(SFG) spectroscopy by gold nanoparticles
• Possible experimental improvement in order to detect Difference Frequency Generation

05/2010-07/2010
Project Student advised by Dr. Valéria Lepère, Institut des Sciences Moléculaires d’Orsay, Paris-Sud University, France
• Investigated the quinine electronic and vibrational properties in gas phase
09/2008-07/2009
Bachelor’s degree in Physics, with honors, Paris-Sud University, France

06/2008-07/2009
Project Student advised by Dr. Christophe Humbert, Laboratoire de Chimie Physique d’Orsay, Paris-Sud University, France
• Investigated the Polarization effect on SFG spectra
• Studied the TIR-SFG at the CaF2/gold nanoparticles interface

Grants-Scholarships-Funding- Awards

02/2020 Eurepean Commission, Marie Skłodowska-Curie Individual Fellowships Grant
01/2020 Academia Sinica , The Best Research Paper Award for Junior Research Investigators
06/2018 Academia Sinica Postdoctoral Scholars (second session 2018)
06/2012 Three-year PhD Research grant from the “Ministère de l’Enseignement Supérieur”, awarded by “École Doctorale Ondes et Matière”.
12/2015 Short listed for the best PhD of the year selection.

Teaching and Supervision

Outreach

• Dalstein, Laetitia “L’or se sculpte en nanos: de petites grains d’or sources de chaleur et de couleur”
Gold nanoparticles synthesis in Front of primary school students (October 2014, Gif-Sur-Yvette)
• Dalstein, Laetitia Protocol elaboration and lab tutorial for high school students
Gold nanoparticles synthesis and characterizations. Laboratoire de Chimie Physique (November 2013)

Teaching

• 2019 Academia Sinica (Taipei, Republic of China).
• Nanophotonics lecture for PhD students (Spring 2019, 3h)

• 2016-2017: KTH (Stockholm, Sweden).
• Lab assistant in IR spectroscopy for Master students (Winter 2016, 30h)

• 2012-2015: Paris Sud University (Orsay, France)
• Tutor in Optics for Master 1 students (2012- 2015, 76h)
• Lab assistant in Optics (polarization) for bachelors students (2012-2014, 40h)
• Lab demonstrator and tutor in Optics for license 1st students (2012- 2014, 70h)

Qualification CNU 30 Optics (France, 2015 and 2020)

Supervision

• Master’s student projects (2015- 2019, 1 in France, 2 in Sweden and 4 in Taiwan)
• Institute of Technology’s student project (2014-2015,1 in France)
• Bachelor’s student projects (2013- 2014, 2019, 3 in France and 2 in Taiwan)

Additional responsibilities

Graduate Students Representative and Coordinator, 2014-2015, Laboratoire de Chimie Physique d’Orsay, Paris-Sud University, France

Elected member of the Laboratory Council, 2014-2015, Laboratoire de Chimie Physique d’Orsay, Paris-Sud University, France

Organiser:
• Laboratory PhD day, July 2015, Laboratoire de Chimie Physique d’Orsay, Paris-Sud University, France
• PhD Paris –Saclay Chemistry Day (9 laboratories and institutes), January 2015, Laboratoire de Chimie Physique d’Orsay, Paris-Sud University, France

Chair: linear and linear vibrational spectroscopy session at ICAVS 10 (Auckland, New-Zeeland, July,2019)

Thèmes

Structuration of aqueous interfaces by Terahertz pulses: A study by Second Harmonic and Sum Frequency Generation – SAInTHz

Interfaces of water and aqueous solutions play a prominent role in many technological and natural processes. The liquid/solid interface is the main driver for many electrochemical reactions. Water being present everywhere, the fields of applications are numerous. The adsorption and release of various gases by the oceans and rain droplets is one of them. The aim of this project is to study the interactions between water and charged interfaces. We will establish an advanced nonlinear optical spectroscopy setup and combine it with terahertz technology, thus revealing the vibrational properties of the interface and controlling the surface charge via the terahertz electromagnetic field. We will first develop and validate the technique on water and will then proceed in applying the technique to study various aqueous interfaces such as fatty acid/water systems, lipid/water interface, mineral oxide/water interfaces.

Key-words: Interfacial water, optical sum frequency generation, second harmonic generation, electric double layer, and surface physical chemistry, terahertz.

Collaborations

Collaborations

Yu-Chieh Wen
Insitute of Physics, Academia Sinica
Taiwan
Optical Physics Lab

Publications

Publications

You can find my publication details at Google Scholar, ResearchGate or Orcid

Publications in Peer review journals

1. Laetitia Dalstein, Jung-Ren Huang, and Yu-Chieh Wen
Wavelength-scanning second harmonic -generation for determining absolute charge density at aqueous interfaces
Optics Letters, 45, 13, 3733-3736, 2020

2. Chiang Kuo-Yang ; Dalstein, Laetitia; Wen, Yu-Chieh
Affinity of Hydrated Protons at Intrinsic Water/vapor Interface Revealed by Ion-Induced Water Alignment
J. Phys. Chem. Lett., 11, 696-701, 2020

3. Dalstein, Laetitia; Humbert, Christophe; Ben Haddada, Maroua;Boujday, Souhir; Barbillon, Grégory; Busson, Bertrand
The Prevailing Role of Hotspots in Plasmon-Enhanced Sum-Frequency Generation Spectroscopy
J. Phys. Chem. Lett., 10, 7706-7711, 2019

4. Busson, Bertrand; Dalstein, Laetitia.
Sum-Frequency Spectroscopy amplified by plasmonics: the small particle case
The Journal of Physical Chemistry C,   123, 43, 26597-26607, 2019

5. Dalstein, Laetitia; Chiang Kuo-Yang; Wen, Yu-Chieh
Direct Quantification of Water Surface Charge by Phase-Sensitive Second Harmonic Spectroscopy
J. Phys. Chem. Lett., 10, 5022, 2019

6. Humbert, Christophe; Noblet, Thomas; Dalstein, Laetitia; Busson, Bertrand; Barbillon, Grégory
Sum-Frequency Generation spectroscopy of Plasmonic Nanomaterials: A Review
Materials, 12 , 836, 2019

7. Busson, Bertrand; Dalstein, Laetitia.
Nonlinear optical response of a gold surface in the visible range: A study by two-color sum frequency spectroscopy. Part III. Simulations of the experimental SFG intensities.
J. Chem. Phys., 149, 154701,2018

8. Richard, William, Evrard, David; Busson, Bertrand; Humbert, Christophe; Dalstein, Laetitia; Tadjeddine, Abderrahmane; Gros, Pierre.
The reduction of 4-nitrobenzene diazonium electro grafted layer: An electrochemical study coupled to in situ sum-frequency generation spectroscopy
Electrochimica Acta, 283, 1640,2018

9. Busson, Bertrand; Dalstein, Laetitia.
Nonlinear optical response of a gold surface in the visible range: A study by two-color sum frequency spectroscopy. Part II. Model for metal nonlinear susceptibility
J. Chem. Phys., 149, 034701,2018

10. Dalstein, Laetitia; Revel, Aldric; Humbert, Christophe; Busson, Bertrand.
Nonlinear optical response of a gold surface in the visible range: A study by two-color sum frequency spectroscopy. Part I: Experimental determination
J. Chem. Phys., 148, 134701,2018

11. Dalstein, Laetitia, Potapova, Elizaveta; Tyrode, Eric.
The elusive silica/water interface: isolated silanols under water as revealed by vibrational sum frequency spectroscopy
Phys. Chem. Chem. Phys. 18, 30394-30406, 2017

12. Dalstein, Laetitia; Ben Haddada, Maroua; Barbillon, Grégory; Humbert, Christophe; Tadjeddine, Abderrahmane; Boujday, Souhir; Busson, Bertrand.
Revealing the Interplay Between Adsorbed Molecular Layers and Gold Nanoparticles by Linear and Nonlinear Optical Properties.
J. Phys. Chem. C 119:17146-17155, 2015

13. Humbert, Christophe; Dahi, Abdellatif; Dalstein, Laetitia; Busson, Bertrand; Lismont, Marjorie; Colson, Pierre; Dreesen, Laurent
Linear and nonlinear optical properties of functionalized CdSe quantum dots prepared by plasma sputtering and wet chemistry. 
J. Colloid Interface Sci. 445:69-75, 2015 

Oral in Conferences/Workshops

1. Dalstein, Laetitia; Chiang Kuo-Yang; Wen, Yu-Chieh, The quantitative analysis on the surface propensity of hydronium with phase-sensitive sum-frequency spectroscopy, ICAVS 10 (Auckland, New-Zeeland, July,2019)

2. Dalstein, Laetitia; Tyrode, Eric, Thin wetting films studied by linear and non-linear vibrational spectroscopies: Linking surface forces to molecular structure, ACS (New York, USA, July,2017)

3. Dalstein, Laetitia; Potapova, Elizaveta; Tyrode, Eric, Silanols at the silica/water interface:
acid/base behavior and dependence on pretreatment history, ACS (New York, USA, July,2017)

4. Dalstein, Laetitia; Humbert, Christophe; Tadjeddine, Abderrahmane; Busson, Bertrand, How the surface plasmon resonance of gold nanostructures impacts on vibrationnal sum-frequency spectroscopy,
Sum-Frequency spectroscopy International Workshop, (Wiesbaden Naurod , Germany, March, 2015)

5. Dalstein, Laetitia; Humbert, Christophe; Busson, Bertrand, Caractérisation de films organiques auto-assemblés sur silicium par spectroscopie optique nonlinéaire: influence de l’ajout de nanoparticules d’or. (Non linear Optical Characterization of organic films auto-assembly on silica : impact of gold nanoparticles), 15ème Journées Francophones des Jeunes Physico-Chimistes, (Dammaries Les Lys, France, October, 2014)

Posters

1. Dalstein, Laetitia; Chiang Kuo-Yang; Wen, Yu-Chieh, Direct Quantification of Water Surface Charge by Phase-Sensitive Second Harmonic Spectroscopy, Nonlinear Optics at Interfaces (Shanghai, China, June 2019, presented by Wen, Yu-Chieh).

2. Dalstein, Laetitia ; Liljeblad, Jonathan F.D. ; Tyrode, Eric, Molecular structure in thin wetting films studied by linear and non-linear vibrational spectroscopy techniques, ICAVS 9 (Victoria BC, Canada, June,2017)

3. Dalstein, Laetitia ; Liljeblad, Jonathan F.D. ; Tyrode, Eric, Molecular Structure in Thin Wetting Films Studied by Linear and Non-linear Vibrational Spectroscopy Techniques, ASMCS (Gothenburg, Sweden, November, 2016)

4. Dalstein, Laetitia ; Liljeblad, Jonathan F.D. ; Tyrode, Eric, Molecular Structure in Thin Wetting Films Studied by Linear and Non-linear Vibrational Spectroscopy Techniques, ECIS (Rome, Italy, September, 2016)

5. Dalstein, Laetitia ; Liljeblad, Jonathan F.D. ; Tyrode, Eric, Structure moléculaire de films de mouillage étudiés par des techniques de spectroscopie vibrationnelle, Optique Bordeaux (Bordeaux, France, July, 2016)

6. Dalstein, Laetitia; Ben Haddada, Maroua; Barbillon, Grégory; Humbert, Christophe; Tadjeddine, Abderrahmane; Boujday, Souhir; Busson Bertrand,  How the surface plasmon resonance of gold nanostructures impacts on sum-frequency generation spectroscopy. GOLD Conference (Cardiff, Great Britain, July, 2015)

7. Dalstein, Laetitia; Humbert, Christophe; Busson, Bertrand, Caractérisation de films organiques auto-assemblés sur silicium par spectroscopie optique nonlinéaire: influence de l’ajout de nanoparticules d’or. (Non linear Optical Characterization of organic films auto-assembly on silica : impact of gold nanoparticles), 15ème Journées Francophones des Jeunes Physico-Chimistes, (Dammaries Les Lys, France, October, 2014)

8. Dalstein, Laetitia; Humbert, Christophe; Busson, Bertrand, Caractérisation de films organiques auto-assemblés sur silicium par spectroscopie optique nonlinéaire: influence de l’ajout de nanoparticules d’or (Non linear Optical Characterization of organic films auto-assembly on silica: influence of the addition of gold nanoparticles), Journée scientifique de l’EDOM, (Orsay, France, November, 2014)

9. Dalstein, Laetitia; Barbillon, Gregory; Humbert, Christophe; Busson, Bertrand, May Sum-Frequency Generation spectroscopy marry the surface plasmon resonance? 3rd Summer School On Plasmonics, (France, July, 2013)

Laetitia DALSTEIN

Laboratoire Ondes et Matière d’Aquitaine (LOMA)
351 cours de la libération
33405 Talence Cedex

Phone : + 33 (0)5 40 00 25 41
E-mail: laetitia.dalstein@u-bordeaux.fr ou dalstein@kth.se