Concept

Coquille (mollusque)

Publications associées (58)

Mechano-responsive microcapsules with uniform thin shells

Capsules often prolong the shelf-life of active ingredients, such as many types of drugs, food additives, or cosmetic substances, because they delay oxidation of these substances or prevent their reactions with molecules contained in the surrounding. If ca ...

2019

X-Shell, a new spatial deployable lattice compared to traditional reticulated shells

Mark Pauly, Florin Isvoranu, Francis Julian Panetta, Etienne Bouleau

The χ-Shells is a new kind of deployable reticulated shells that has features comparable to other traditional shells. Its deployment uses the mechanical properties of a beam grid to generate a three-dimensional shape. This new generation of reticulated she ...

International Association for Shell and Spatial Structures (IASS)2019

Nacre-inspired Hard and Tough Materials

Esther Amstad, Huachuan Du

Nature fabricates materials with properties that are difficult to reproduce with manmade counterparts. For example, nacre, composed of layers of CaCO3 crystals that are interspaced with small quantities of organic components, is one of the toughest known b ...

2019

Evolution of critical buckling conditions in imperfect bilayer shells through residual swelling

Pedro Miguel Nunes Pereira de Almeida Reis, Matteo Pezzulla, Dong Yan, Anna Lee

We propose and investigate a minimal mechanism that makes use of differential swelling to modify the critical buckling conditions of elastic bilayer shells, as measured by the knockdown factor. Our shells contain an engineered defect at the north pole and ...

ROYAL SOC CHEMISTRY2019

Ultrafast Broadband Fluorescence Up-conversion Study of the Electronic Relaxation of Metalloporphyrins

Majed Chergui, Andrea Cannizzo, Olivier Christian Bräm

We present a systematic study of the ultrafast fluorescence with broadband detection and similar to 110 fs resolution of 5,10,15,20-tetraphenylporphin (TPP) and 2,3,7,8,12,13,17,18-oc-taethylporphin (OEP), with open 3d-shell metals. We also revisit the cas ...

AMER CHEMICAL SOC2019

An Alternative One-Electron Oxidation Strategy to Access Hypervalent Iodine Reagents

Jérôme Waser, Marion Marie-Agnès Garreau

In this issue of Chem, Powers and co-workers demonstrate that iodanyl radicals are the key oxidants and chain carriers in a proposed open-shell mechanism for the aerobic synthesis of hypervalent iodine compounds. ...

2019

Capsules with submicron shells: production, stability, and leakage behavior

Antoine Claude Jean Vian

Capsules are often employed to prolong the shelf-life of active ingredients such as many drugs, food additives, or cosmetic substances because they delay their oxidation or prevent interactions with molecules contained in the surrounding. If designed prope ...

EPFL2018

Scalable production of double emulsion drops with thin shells

Esther Amstad, Antoine Claude Jean Vian

Double emulsions are often used as containers to perform high throughput screening assays and as templates for capsules. These applications require double emulsions to be mechanically stable such that they do not coalesce during processing and storage. A p ...

2018

On Establishing Buckling Knockdowns for Imperfection-Sensitive Shell Structures

Emmanuel Georges Albert Virot

This paper investigates issues that have arisen in recent efforts to revise long-standing knockdown factors for elastic shell buckling, which are widely regarded as being overly conservative for well-constructed shells. In particular, this paper focuses on ...

ASME2018

Gold Raspberry-Like Colloidosomes Prepared at the Water-Nitromethane Interface

Hubert Girault, Pekka Eero Peljo, Evgeny Smirnov

Here, we propose a simple shake-flask method to produce micron-size colloidosomes from a liquid-liquid interface functionalized with a gold nanoparticle film. A step-by-step extraction process of an organic phase partially miscible with water led to the fo ...

2018

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