H2020Индивидуална стипендия2018–2021

S-OMMs · Smart Optical Metamaterials: A route towards electro-tuneable fast-reversible self-assembly of nanoparticles at controlled electrochemical interfaces

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2018-07-16 → 2021-03-16
Финансиране от ЕС: 195 455 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Оптичните метаматериали се създават чрез подреждане на метални наночастици с помощта на електрическо напрежение, което позволява повърхността да се превключва между „огледало“ и „прозорец“. Тези устройства могат да намалят енергийните разходи и да помогнат за откриването на опасни химически или биологични молекули.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Smart Optical Metamaterials: A route towards electro-tuneable fast-reversible self-assembly of nanoparticles at controlled electrochemical interfaces

Numerous smart optical applications of the future belong to a new generation of artificial materials comprising nanoscale building-blocks, capable of exhibiting extraordinary optical responses. Recent progress in nanotechnology enabled developing such optical metamaterials (OMMs) economically via voltage-controlled self-assembly of metallic nanoparticles (NPs) at electrochemical interfaces. For instance, a dense layer of metallic NPs of nanometer thickness strongly reflects incident light like a ‘mirror’, whereas a sparse layer enacts a ‘window’ by allowing light to pass through. This unique class of OMMs provides a platform for realizing switchable mirror/window, absorber/mirror devices (via NP assembly/disassembly on metallic substrate) etc. Besides tuneable optics, dense OMMs could also generate abundance of tuneable electric-field ‘hot-spots’ for ultrasensitive detection of trace amount of molecules. This project aimed at developing ‘smart’ electrotuneable OMMs for novel applications in materialising programmable mirrors, tuneable optical-filters and -cavities, and molecule-detectors. Smart electro-tuneable optical devices are particularly important for society as these could play a vital role in minimizing the global energy needs by either harvesting solar radiation or by tuning optical devices dynamically with much lower voltage variation or by making the devices more efficient and long lasting. These OMMs as an ultrasensitive detector of biological and chemical molecules can sense any threat to food, health and security. The objectives were to explore new architectures of electrodes for NP assembly to deliver application-specific, narrow or broadband, reflectance and/or transmittance spectra, develop new schemes for efficient voltage control over NP assembly/disassembly to achieve fast switching between different arrangements of NPs for fast alteration of the system’s optical response.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

Futuristic smart optical applications belong to novel artificial materials comprising nanoscale building blocks, exhibiting extra-ordinary optical responses. Recent progress in nanotechnology has enabled developing such optical metamaterials (OMMs) economically via controlled self-assembly of nanoparticles (NPs). Strikingly, a dense nanometre-thick layer of metallic NPs strongly reflects incident light like a ‘mirror’, whereas a sparse layer enacts a near-transparent ‘window’. Thus OMMs could form a switchable mirror–window to minimize our energy needs by harvesting light. Besides tuneable-optics, dense OMMs could revolutionise sensing of trace-analytes for detecting threats to our health, safety, and security. I aim to develop new means of dynamic control over resulting NP-layer architecture to make OMMs ‘smart’, for novel applications like fast-programmable mirrors, -tuneable optical-filters and -cavities. But achieving quick alteration of NP architectures for fast-tuneable optical response is very challenging. Voltage-controlled assembly and disassembly of NPs at interfaces between liquid electrolyte and solid electrodes could be one efficient method. However, these processes are often diffusion-limited, making OMMs slow to respond. This requires the desired systems to be confined, or miniaturized, by developing new schemes and custom-made architectures to ensure assembly/disassembly occurs within sub-second timescales. To achieve this, I will engage novel electrode designs—patterned as rectangular-groove gratings, columnar structures, and flat transparent plates—where NPs can rearrange quickly on desired areas of the electrodes to either reflect or transmit light. This research unites physical-chemistry with optics and nanotechnology. I will develop optimal designs of the systems, via modelling and simulations, and navigate experiments for prototype creation in collaborating laboratories of the Imperial and overseas partners in France, Netherlands, and Germany.

Оригинален текст от CORDIS (на английски).

Участници

IMPERIAL COLLEGE OF SCIENCE TECHNOLOGY AND MEDICINE · LondonКоординаторОбединеното кралство