A5045152665- Block Copolymer Self-Assembly
- Advanced Polymer Synthesis and Characterization
- Advancements in Photolithography Techniques
- Polymer Surface Interaction Studies
- Electron and X-Ray Spectroscopy Techniques
- Welding Techniques and Residual Stresses
- Surfactants and Colloidal Systems
- Plasma Diagnostics and Applications
- Markov Chains and Monte Carlo Methods
- Biomedical and Engineering Education
- Material Dynamics and Properties
- Computational Drug Discovery Methods
- Nanopore and Nanochannel Transport Studies
- Semiconductor materials and devices
- Synthesis and properties of polymers
- Theoretical and Computational Physics
- Liquid Crystal Research Advancements
- Machine Learning in Materials Science
- Copper Interconnects and Reliability
- Geochemistry and Geologic Mapping
- Dendrimers and Hyperbranched Polymers
University of Liverpool
2023
Durham University
2021
Aston University
2017-2018
Lomonosov Moscow State University
2007-2014
Abeam Technologies (United States)
2013
Universität Ulm
2007
Multiblock copolymers (MBCPs) are an emerging class of materials that becoming more accessible in recent years. However, to date there is still a lack fundamental understanding their physical properties. In particular, the glass transition temperature (Tg) which known be affected by phase separation has not been well characterized experimentally. To this end, we report first experimental study on evolution Tgs and corresponding linear MBCPs with increasing number blocks while keeping overall...
Using dissipative particle dynamics simulations, we study the swelling of lamellae-forming diblock copolymer films in a nonselective solvent. Both parallel and perpendicular orientations lamellae film are studied. The with is accompanied by an increase their number. In doing so, lamellar thickness reveals nonmonotonous behavior: affine growth (low degree solvent uptake) succeeded decrease (high uptake). Whereas first regime reflects finite size (film thickness) effect, more common which also...
Hydrogen bonding plays a role in the microphase separation behavior of many block copolymers, such as those used lithography, where stronger interactions due to hydrogen can lead smaller period for self-assembled structures, allowing production higher resolution templates. However, current statistical thermodynamic models descriptions separation, Flory–Huggins approach, do not take into account some important properties bonding, site specificity and cooperativity. In this combined...
We report a combined experimental and theoretical study of micellization block copolymer with hydrophilic nonionic corona-forming blocks weak polyelectrolyte (wPE) core-forming pH-triggered solubility in aqueous solutions. demonstrate that addition to micelles neutral cores, there exist two other types PE- or ionomer-like which monovalent counterions are released condensed on core wPE block, respectively. The transition between the occurred upon changes ionization PE resulted nonmonotonous...
Here, we present the outcomes from second Large Language Model (LLM) Hackathon for Applications in Materials Science and Chemistry, which engaged participants across global hybrid locations, resulting 34 team submissions. The submissions spanned seven key application areas demonstrated diverse utility of LLMs applications (1) molecular material property prediction; (2) design; (3) automation novel interfaces; (4) scientific communication education; (5) research data management automation;...
We propose a theory of nanopattern formation in ultrathin films obtained by the spreading A-B diblock copolymers on surface. A blocks are strongly adsorbed (spread) substrate, and strength adsorption can be varied. B incompatible with but they spread atop layer blocks. predict disk-shaped micelles ordered hexagonal symmetry parallel stripe-shaped bilayers to stable. The type resulting structure its geometrical parameters depend composition copolymer interaction parameters. interrelate these...
Improvements in the variation of critical dimensions (CD) and placement accuracy electron beam lithography (EBL) are high importance modern maskmaking industry where acceptable variations on one nanometer range over mask area. In EBL, electrons backscatter from resist substrate, reach bottom objective lens come back to resist, causing undesirable exposure charging far away point exposure. This fogging affects both CD accuracy. The Monte Carlo software CHARIOT was upgraded be capable...
The semiconductor maskmaking industry imposes challenging requirements for the uniformity of critical dimensions (CDs) and placement error. In electron beam lithography (EBL), electrons backscatter from resist substrate, reach bottom objective lens come back to resist, causing undesirable exposure charging far away point exposure. This fogging effects both CD variation accuracy in EBL. Monte Carlo software chariot was upgraded be capable simulating this effect. results simulations are...
In this work, we calculate Flory–Huggins phase diagrams for correlated random copolymers. We achieve it in two steps. At first, derive a distribution function of two-letter A, B copolymer chains depending on the fraction A-segments and AB-duplets. Then, use method moments, which was developed by Sollich Cates [ Phys. Rev. Lett. 80, 1998, 1365−1368] polydisperse systems, to reduce number degrees freedom computational problem diagrams. explore how location transition points composition...
The semiconductor maskmaking industry imposes challenging requirements for the uniformity of critical dimensions (CD) and placement error. In electron beam lithography (EBL), electrons backscatter from resist substrate, reach bottom objective lens come back to resist, causing undesirable exposure charging far away point exposure. This fogging effects both CD variation accuracy in EBL. Monte Carlo software CHARIOT was upgraded be capable simulating this effect. results simulations are...
The structural evolution in poly(styrene-b-butadiene) (P(S-b-B)) diblock copolymer thin films during treatment with cyclohexane vapor is investigated in-situ and real-time using grazing-incidence small-angle X-ray scattering (GISAXS) [1]. Both the swelling drying process are investigated. lamellae initially perpendicular to film surface, i.e. laterally nanostructured. Cyclohexane a good solvent for PB theta PS, i.e., it slightly selective. Using incident angles above below polymer critical...
It is an interesting fact that approximately 50% of entries in the Inorganic Crystal Structure Database (ICSD) exhibit some form structural disorder. While ordered crystalline materials have been extensively researched, disordered remain less understood terms their stability and structure-property relationships. A deeper comprehension disorder would allow using it as a tool for designing novel with tailored properties. This work aims to provide thorough analysis structurally within ICSD,...
Hydrogen bonding plays a role in the microphase separation behavior of many block copolymers, such as those used lithography, where stronger interactions due to H-bonding can lead smaller period for self-assembled structures, allowing production higher resolution templates. However, current statistical thermodynamic models descriptions separation, Flory-Huggins approach, do not take into account some important properties hydrogen bonding, site specificity and cooperativity. In this combined...
Multivalency is a common biological mechanism of formation strong reversible and selective bonds by grouping weak bonds. Polymers often act as scaffold to which multiple binding groups are attached. Here I present an analytical theory allowing calculate avidity selectivity for multivalent polymeric particles using tools from the associating fluids. explicitly take into account conformational degrees freedom discuss how they affect superselectivity. also consider linear with two types ligands...