Sylvie Roke

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Sylvie Roke

2022

Charge Gradients around Dendritic Voids Cause Nanoscale Inhomogeneities in Liquid Water

Sylvie Roke, Nathan Dupertuis, Yixing Chen, Tereza Schönfeldová

Water is the matrix of life and serves as a solvent for numerous physical and chemical processes. The origins of the nature of inhomogeneities that exist in liquid water and the time scales over which they occur remains an open question. Here, we report fe ...

AMER CHEMICAL SOC2022

Water as a contrast agent to quantify surface chemistry and physics using second harmonic scattering and imaging: A perspective

Sylvie Roke

Molecular level interactions that take place at the interface of different materials determine their local electrical, chemical, and mechanical properties. In the case of solid interfaces, this information has traditionally been obtained with experimental ...

AIP Publishing2022

Ultrasensitive Label-Free Detection of Protein–Membrane Interaction Exemplified by Toxin-Liposome Insertion

Sylvie Roke, Matteo Dal Peraro, Chan Cao, Halil Ibrahim Okur, Mircea Ioan Iacovache, Tereza Schönfeldová

Measuring the high-affinity binding of proteins to liposome membranes remains a challenge. Here, we show an ultrasensitive and direct detection of protein binding to liposome membranes using high throughput second harmonic scattering (SHS). Perfringolysin ...

2022

Ion-Induced Transient Potential Fluctuations Facilitate Pore Formation and Cation Transport through Lipid Membranes

Sylvie Roke, Maksim Eremchev, David Roesel

Unassisted ion transport through lipid membranes plays a crucial role in many cell functions without which life would not be possible, yet the precise mechanism behind the process remains unknown due to its molecular complexity. Here, we demonstrate a dire ...

2022

Three-Dimensional Confinement of Water: H2O Exhibits Long-Range (> 50 nm) Structure while D2O Does Not

Sylvie Roke, Orly Bagunu Tarun, Nathan Dupertuis, Cornelis Ulrich Lütgebaucks

Water is the liquid of life thanks to its three-dimensional adaptive hydrogen (H)-bond network. Confinement of this network may lead to dramatic structural changes influencing chemical and physical transformations. Although confinement effects occur on a < ...

AMER CHEMICAL SOC2022

Handy water: Chiral superstructures around peptide beta-sheets

Sylvie Roke, Saranya Pullanchery Sankara Narayanan

National Academy of Sciences2021

Dynamic second-harmonic imaging of lipid membrane hydration induced by copper ions

Sylvie Roke, Seonwoo Lee, David Roesel

SPRINGER2021

Imaging Cu2+ binding to charged phospholipid membranes by high-throughput second harmonic wide-field microscopy

Sylvie Roke, Seonwoo Lee, David Roesel

The interaction of divalent copper ions (Cu2+) with cell membranes is crucial for a variety of physiological processes of cells, such as hormone synthesis and cellular energy production. These interactions would not be possible without membrane hydration. ...

AIP Publishing2021

Hyaluronan orders water molecules in its nanoscale extended hydration shells

Sylvie Roke, Jan Dedic, Halil Ibrahim Okur

Hyaluronan (HA) is an anionic, highly hydrated bio-polyelectrolyte found in the extracellular environment, like the synovial fluid between joints. We explore the extended hydration shell structure of HA in water using femto-second elastic second-harmonic s ...

AMER ASSOC ADVANCEMENT SCIENCE2021

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Water as a contrast agent to quantify surface chemistry and physics using second harmonic scattering and imaging: A perspective

Sylvie Roke

AIP Publishing2022

Ion-Induced Transient Potential Fluctuations Facilitate Pore Formation and Cation Transport through Lipid Membranes

Sylvie Roke, Maksim Eremchev, David Roesel

2022

Charge Gradients around Dendritic Voids Cause Nanoscale Inhomogeneities in Liquid Water

Sylvie Roke, Nathan Dupertuis, Yixing Chen, Tereza Schönfeldová

AMER CHEMICAL SOC2022