Publications by authors named "Michalina Iwan"
Article Synopsis
- - The research focuses on developing adaptive Langmuir films that can change in response to environmental stimuli, specifically studying the behavior of nanoparticles capped with a poly(-isopropyl acrylamide) layer.
- - By varying temperatures, the study shows that these nanoparticles can switch between densely packed uniform states and nonuniform states, suggesting an unusual phase behavior where order increases with higher temperatures.
- - The findings help inform the design of advanced two-dimensional systems, like programmable membranes and optical devices, through various experimental techniques like surface pressure measurements and microscopy.
Understanding the mobility of nano-objects in the eukaryotic cell nucleus, at multiple length-scales, is essential for dissecting nuclear structure-function relationships both in space and in time. Here, we demonstrate, using single-molecule fluorescent correlation spectroscopies, that motion of inert probes (proteins, polymers, or nanoparticles) with diameters ranging from 2.6 to 150 nm is mostly unobstructed in a nucleus.
View Article and Find Full Text PDFMetabolic reactions in living cells are limited by diffusion of reagents in the cytoplasm. Any attempt to quantify the kinetics of biochemical reactions in the cytosol should be preceded by careful measurements of the physical properties of the cellular interior. The cytoplasm is a complex, crowded fluid characterized by effective viscosity dependent on its structure at a nanoscopic length scale.
View Article and Find Full Text PDFBiochemistry in living cells is an emerging field of science. Current quantitative bioassays are performed ex vivo, thus equilibrium constants and reaction rates of reactions occurring in human cells are still unknown. To address this issue, we present a non-invasive method to quantitatively characterize interactions (equilibrium constants, K) directly within the cytosol of living cells.
View Article and Find Full Text PDFPorous carbon nanohybrids are promising materials as high-performance electrodes for both sensing and energy conversion applications. This is mainly due to their high specific surface area and specific physicochemical properties. Here, new porous nanohybrid materials are developed based on exfoliated MoS nanopetals and either negatively charged phenylsulfonated carbon nanoparticles or positively charged sulfonamide functionalized carbon nanoparticles.
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