Merve Yesilbas

Merve Yesilbas
Umeå University | UMU · Department of Chemistry

Ph.D

About

18
Publications
3,296
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136
Citations
Introduction
Merve Yesilbas completed her PhD studies in Umeå University under the supervision of Prof. Jean-François Boily by April 2018. Merve's research was focused on the condensation and freezing of water on minerals that are of common occurrence to soils on Earth, the atmosphere and planet Mars including a wide range of synthetic to natural minerals. Merve's research interest includes the inorganic chemical processes in mineral/water, mineral/ice and mineral/gas interfacial chemistry. Furthermore, she has studied the vibration spectroscopic signatures of carbon-based materials (e.g fullerene) and the gas molecules (e.g acetylene, CO2). Merve is highly skilled in Vibrational Spectroscopy and chemometrics, and interested in Surface Chemistry and Atmospheric Sciences.
Additional affiliations
November 2019 - present
SETI Institute
Position
  • PostDoc Position
June 2019 - present
Umeå University
Position
  • PostDoc Position
Description
  • Swedish Research Council Postdoc Fellow
September 2016 - January 2017
Umeå University
Position
  • Assistant Supervisor
Description
  • Clara H. Cortinovis ‘Water and organic acid adsorption at Biotite surfaces’, (Sep 2016- Jan 2017), 30 ECTS, Master thesis (Assistant Supervisor 50%)
Education
March 2014 - April 2018
Umeå University
Field of study
  • Chemistry
February 2011 - June 2013
Umeå University
Field of study
  • Physics
September 2006 - February 2011
Yildiz Technical University
Field of study
  • Physics

Publications

Publications (18)
Thesis
Full-text available
Minerals in Earth’s crust and suspended in the atmosphere form water or ice films as thin as a few nanometers to as thick as a few micrometers, and beyond. Mineral-bound water and ice films in terrestrial systems (e.g. vadose zones, permafrosts) can impact the bio(geo)chemistry of nutrients and contaminants, water cycling, as well as possible land-...
Article
Full-text available
Atmospheric water vapour interacting with hydrophilic mineral surfaces can produce water films of various thicknesses and structures. In this work we show that mineral particle size controls water loadings achieved by water vapour deposition on 21 contrasting mineral samples exposed to atmospheres of up to ~16 Torr water (70% relative humidity at 2...
Article
Hydrated expandable clay minerals that are common to Earth's atmosphere, terrestrial and aquatic environments can form gels that host saline solutions. Using cryogenic electron microscopy and vibration spectroscopy we show that saline gels of montmorillonite frozen at < -90 °C host finger-like hexagonal ice (Ih) microcrystals embedded in a network...
Article
Full-text available
Ice films formed at mineral surfaces are of widespread occurrence in nature, and are involved in numerous atmospheric and terrestrial processes. In this study we studied thin ice films at surfaces of nineteen synthetic and natural mineral samples of varied structure and composition. These thin films were formed by sublimation of thicker hexagonal i...
Article
The vibrational spectral profiles of Na- and Ca-montmorillonite (MMT) of controlled water layer populations (nW) was extracted by chemometric analysis of new Fourier Transform Infrared (FTIR) spectroscopy data, and validated by mixed-layer modeling of previously published X-ray diffraction data. These efforts resolved FTIR spectral profiles of 0W,...
Article
Full-text available
On Mars, seasonal martian flow features known as recurring slope lineae (RSL) are prevalent on sun-facing slopes and are associated with salts. On Earth, subsurface interactions of gypsum with chlorides and oxychlorine salts wreak havoc: instigating sinkholes, cave collapse, debris flows, and upheave. Here, we illustrate (i) the disruptive potentia...
Article
Full-text available
Knowledge of the occurrences of water films on minerals is critical for global biogeochemical and atmospheric processes, including element cycling and ice nucleation. The underlying mechanisms controlling water film growth are, however, misunderstood. Using infrared nanospectroscopy, amplitude-modulated atomic force microscopy, and molecular simula...
Article
Moist CO2-bearing air flowing in terrestrial environments of Earth’s, and now warming, cryosphere can be captured by thin nanometric water films supported by mineral nanoparticles. Molecular-level mechanisms driving the fate of CO2 by these water films at 25, -10 and -50 °C were resolved by vibration spectroscopy of mineral nanoparticles of well-kn...
Poster
Full-text available
This study aims to develop a fundamental understanding for the ice and cryosalt hydrohalite (HH; NaCl.2H2O) formation at the surfaces and interfaces of aggregated montmorillonite (MMT) particles, an expandable clay mineral, from briny solutions at -10°C and -90°C. Cryogenic-Fourier Transform Infrared Spectroscopy (FTIR) and Field-Emission Cryogenic...
Article
Full-text available
Nanoconfinement of CO2 in layered aluminosilicates contributes to the capture and release of this greenhouse gas in soils. In this work, we show that residence times of CO2 in montmorillonite are lowered by 15 min for each 1°C increment in temperature during venting. Molecular simulations showed that activation energies of release are about half of...
Article
Electrolyte ion binding at mineral surfaces is central to the generation of surface charge and key to electric double layer formation. X-ray photoelectron spectroscopy (XPS) of fast-frozen (-170°C) mineral wet pastes provides a means to study weakly bound electrolyte ions at the mineral/water interface. In this study, we build upon a series of arti...
Article
Full-text available
Mineral surfaces exposed to moist air stabilize nanometer- to micrometer-thick water films. This study resolves the nature of thin water film formation at multifaceted hematite (α-Fe2O3) nanoparticle surfaces with crystallographic faces resolved by selected area electron diffraction. Dynamic vapor adsorption (DVA) in the 0-19 torr range at 298 K sh...
Article
Illumination of fullerene with visible light in the presence of oxygen leads to a transition of oxygen from triplet (ground) to singlet (excited) state where singlet oxygen is a long-lived reactive oxygen species. The effectiveness of fullerene as a singlet oxygen generator drastically decreases when fullerenes are condensed into a bulk material, m...

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Projects

Projects (2)
Project
- Past and present environment of Mars, climate and habitability - Find best water resources for future human explorations
Project
This project is focused on the water adsorption, condensation and freezing on minerals. This project currently divided into two parts described in below. Part A. To resolve the role of minerals in thin water and ice film formation by using vibrational spectroscopy . Minerals that play major roles on the chemistry of Earth and planet Mars were chosen for this project. Part B is specifically dedicated to mineral montmorillonite, a representative swelling type of clay mineral that widespreadly occur on Earth, atmosphere and planet Mars as well as in technological applications. . To depict the intercalated thin water films between nanometer-thick layers of montmorillonite . To determine the ice and cryosalt formation in the micropores of montmorillonite gels . To determine the uptake and release rates of intercalated CO2 from cold (~ -50°C) to warmer (up to 130°C) conditions