Tootfinder

Impact of particle-size polydispersity on the quality of thin-film colloidal crystals
Mariam Arif, Andrew B. Schofield, Fraser H. J. Laidlaw, Wilson C. K. Poon, Job H. J. Thijssen
https://arxiv.org/abs/2507.13258

Impact of particle-size polydispersity on the quality of thin-film colloidal crystals
Size polydispersity in colloidal particles can disrupt order in their self-assembly, ultimately leading to a complete suppression of crystallization. In contrast to various computational studies, few experimental studies systematically address the effects of size polydispersity on the quality of colloidal crystals. We present an experimental study of structural order in thin films of crystals vertically dried from colloidal dispersions with a systematically varying polydispersity. As expected, …

Colloidal hydrodynamic interactions in viscoelastic fluid
Dae Yeon Kim, Sachit G. Nagella, Saksham Malik, Nayeon Park, Jaewook Nam, Eric S. G. Shaqfeh, Sho C. Takatori
https://arxiv.org/abs/2508.11948 …

Colloidal hydrodynamic interactions in viscoelastic fluid
The motion of suspended colloidal particles generates fluid disturbances in the surrounding medium that create interparticle interactions. While such colloidal hydrodynamic interactions (HIs) have been extensively studied in viscous Newtonian media, comprehensive understanding of HIs in viscoelastic fluids is lacking. We develop a framework to quantify HIs in viscoelastic fluids with high spatiotemporal precision by trapping colloids and inducing translation-rotation hydrodynamic coupling. Usin…

Formal Verification for JavaScript Regular Expressions: a Proven Semantics and its Applications
Aur\`ele Barri\`ere, Victor Deng, Cl\'ement Pit-Claudel
https://arxiv.org/abs/2507.13091

Formal Verification for JavaScript Regular Expressions: a Proven Semantics and its Applications
We present the first mechanized, succinct, practical, complete, and proven-faithful semantics for a modern regular expression language with backtracking semantics. We ensure its faithfulness by proving it equivalent to a preexisting line-by-line embedding of the official ECMAScript specification of JavaScript regular expressions. We demonstrate its practicality by presenting two real-world applications. First, a new notion of contextual equivalence for modern regular expressions, which we use t…

Jamaree Caldwell Stuffs Geno Smith to Take Raiders Out of Red Zone https://www.chargers.com/video/jamaree-caldwell-highlight-sack-geno-smith-vs-raiders-week-2-2025

LINC: An In-Network Coding Approach to Tame Packet Loss in Hybrid Wireless-Fiber Backbones
Benoit Pit-Claudel, Muriel M\'edard, Manya Ghobadi
https://arxiv.org/abs/2509.13714

LINC: An In-Network Coding Approach to Tame Packet Loss in Hybrid Wireless-Fiber Backbones
The emergence of ultra-low latency applications, such as financial transactions, has driven the development of hybrid backbone networks that rely on fiber, satellite, and microwave links. Despite providing low latencies, these hybrid networks suffer from occasional environmental packet loss caused by poor weather, construction, and line of sight blockage. Paradoxically, today's hybrid backbones rely on conventional transport protocols that take packet loss to signal network congestion, as oppos…

Morphological and Chemical Changes in Cd-free Colloidal QD-LEDs During Operation
Ruiqi Zhang, Jamie Geng, Shaun Tan, Shreyas Srinivasan, Taehyung Kim, Mayuran Saravanapavanantham, Kwang-Hee Lim, Mike Dillender, Heejae Chung, Thienan Nguyen, Karen Yang, Yongli Lu, Taegon Kim, Moungi G. Bawendi, Vladimir Bulovic
https://arxiv.org/abs/2509.12…

Morphological and Chemical Changes in Cd-free Colloidal QD-LEDs During Operation
Heavy metal-free quantum-dot light-emitting devices (QD-LEDs) have demonstrated remarkable brightness, saturated color, and high efficiencies across a broad spectral range. However, in contrast to organic LEDs (OLEDs), QD-LED operational lifetimes remain limited, with the underlying degradation mechanisms not fully understood. In the present study, we show that InP/ZnSe/ZnS (red-emitting) and ZnTeSe/ZnSe/ZnS (blue-emitting) cadmium-free colloidal QD-LEDs undergo nanoscale morphological changes …

Designing binary mixtures of colloidal particles with simple interactions that assemble complex crystals
Beth Hsiao-Yen Wei, C. Levi Petix, Qizan Chen, Michael P. Howard, Jeetain Mittal
https://arxiv.org/abs/2507.13166

Designing binary mixtures of colloidal particles with simple interactions that assemble complex crystals
Computational methods for designing interactions between colloidal particles that induce self-assembly have received much attention for their promise to discover tailored materials. However, it often remains a challenge to translate computationally designed interactions to experiments because they may have features that are too complex, or even infeasible, to physically realize. Toward bridging this gap, we leverage relative-entropy minimization to design pair potentials for binary mixtures of …

Inverse design of drying-induced assembly of multicomponent colloidal-particle films using surrogate models
Mayukh Kundu, Michaela Bush, Chris A. Kieslich, Michael P. Howard
https://arxiv.org/abs/2509.10645

Inverse design of drying-induced assembly of multicomponent colloidal-particle films using surrogate models
The properties of films assembled by drying colloidal-particle suspensions depend sensitively on both the particles and the processing conditions, making them challenging to engineer. In this work, we develop and test an inverse-design strategy based on surrogate modeling to identify conditions that yield a target film structure. We consider a two-component hard-sphere colloidal suspension whose designable parameters are the particle sizes, the initial composition of particles, and the drying r…

How Microplastics cross the Buoyancy Barrier: A multi-scale Study
Thomas Witzmann, Anja F. R. M. Ramsperger, Hao Liu, Yifan Lu, Holger Schmalz, Lucas Kurzweg, Tom C. D. B\"orner, Kathrin Harre, Andreas Greiner, Christian Laforsch, Holger Kress, Christina Bogner, Stephan Gekle, Andreas Fery, G\"unter K. Auernhammer
https://arxiv.o…

How Microplastics cross the Buoyancy Barrier: A multi-scale Study
Microplastics (MPs), though less dense than water, are frequently recovered from sediments in aqueous environments, indicating they can cross the buoyancy barrier. We quantify eco-corona mediated MP-sediment attraction and MP transport from the nanoscale to the macroscale, linking all scales to a coherent mechanism explaining how MP overcome buoyancy and settle in sediments through interaction with suspended sediment. Colloidal probe atomic force microscopy (CP-AFM) detected attractive forces…