Abstract The recent interest of electronic skin (e‐skin) has pushed the research toward development flexible sensors, namely, for pressure detection. Several mechanisms can be used to transduce into electrical signals, but piezoresistivity presents advantages due its simplicity. microstructuration films composing these sensors is a common strategy improve their sensitivity. As an alternative conventional and expensive photolithography techniques low customizable based on natural molds, novel...

Indium tin oxide (ITO) is the current standard state‐of‐the‐art transparent conductive (TCO), given its remarkable optical and electrical properties. However, scarcity of indium carries an important drawback for long‐term application due to intensive use in many optoelectronic devices such as displays, solar cells, interactive systems. Zinc oxide‐based TCOs can be a cost‐effective viable alternative, but limitations imposed by their transmittance versus resistivity tradeoff still keep them...

The post‐deposition modification of ZnO‐based transparent conductive oxides (TCOs) can be the key to produce thin films with optoelectronic properties similar indium tin oxide (ITO), but at a much lower cost. Here, we present electro‐optical results achieved for annealing Al–Zn–O (AZO), AZO:H, Ga–Zn–O:H (GZO:H), and Zn–O:H (ZNO:H) deposited by RF sputtering room temperature. These studies comprise thermal atmospheric pressure, vacuum, forming gas, H 2 Ar atmospheres, plasmas, which lead...

Electronic skin (e-skin) is pursued as a key component in robotics and prosthesis to confer them sensing properties that mimic human skin. For pressure monitoring, great emphasis on piezoresistive sensors was registered due the simplicity of sensor design readout mechanism. higher sensitivity, films composing these may be micro-structured, usually by expensive photolithography techniques or low-cost low-customizable molds. Sensors commonly present different sensitivities ranges, which should...

Abstract Many diseases have their treatment options narrowed and end up being fatal if detected during later stages. As a consequence, point-of-care devices an increasing importance for routine screening applications in the health sector due to portability, fast analyses decreased cost. For that purpose, multifunctional chip was developed tested using gold nanoprobes perform RNA optical detection inside microfluidic without need of molecular amplification steps. proof-of-concept, this device...

A short passive planar micromixer was experimentally optimised using statistical methods to determine parameter significance and most desirable geometry.

Supraparticle (SP) microlasers fabricated by the self-assembly of colloidal nanocrystals have great potential as coherent optical sources for integrated photonics. However, their deterministic placement integration with other photonic elements remains an unsolved challenge. In this work, we demonstrate manipulation and printing individual SP microlasers, laying foundation use in more complex circuits. We fabricate CdSxSe1-x/ZnS quantum dot (CQD) SPs diameters from 4 to 20 μm Q-factors...

Luminescent supraparticles of colloidal semiconductor nanocrystals can act as microscopic lasers and are hugely attractive for biosensing, imaging, drug delivery. However, biointerfacing these to increase functionality while retaining their main optical properties remains an unresolved challenge. Here, we propose demonstrate red-emitting, silica-coated CdSxSe1−x/ZnS quantum dot functionalized with a biotinylated photocleavable ligand. The success each step the synthesis is confirmed by...

The surface functionalisation of self-assembled colloidal quantum dot supraparticle lasers with a thrombin binding aptamer (TBA-15) has been demonstrated. self-assembly CdSSe/ZnS alloyed core/shell microsphere-shape CQD supraparticles emitting at 630 nm was carried out using an oil-in-water emulsion technique, yielding microspheres oleic acid and average diameter 7.3 ± 5.3 µm. Surface modification the achieved through ligand exchange mercaptopropionic subsequent attachment TBA-15 EDC/NHS...

This work describes the production of electronic-skin (e-skin) piezoresistive sensors, which micro-structuration is performed using laser engraved molds. With this fabrication approach, low-cost sensors are easily produced with a tailored performance. Sensors micro-cones and high sensitivity −1 kPa−1 under 600 Pa more adequate for blood pressure wave detection, while micro-structured semi-spheres maximum −6 × 10−3 in large range (1.6 kPa to 100 kPa) suitable robotics functional prosthesis.

We demonstrate the superior emission properties of a red-emitting self-assembled quantum dot microsphere laser made from blend green and red bandgap CdS <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</inf> Se xmlns:xlink="http://www.w3.org/1999/xlink">1-x</inf> / ZnS dots. The addition higher material reduces self-absorption improves Q-factor.

Self-assembled microsphere lasers oscillating simultaneously at more than one wavelength in the visible are reported. The consist of micron-scale supraparticles made CdS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</sub> Se xmlns:xlink="http://www.w3.org/1999/xlink">1-x</sub> /ZnS quantum dots that emit between 585-605 nm and 625-655 nm.

In article number 1800182, Rui Igreja and co-workers develop a strategy for the microstructuration of polydimethylsiloxane (PDMS) films into micro-cones using laser engraving/cutting machine, covered them with carbon ink. The are used micro-structured electronic skin pressure sensor placed on human wrist detection blood wave, exhibiting great potential health applications.

Abstract The therapeutic application of blue light (380 – 500nm) has garnered considerable attention in recent years as it offers a non-invasive approach for the management prevalent skin conditions including acne vulgaris and atopic dermatitis. These are often characterised by an imbalance microbial communities that colonise our skin, termed microbiome. In vulgaris, is thought to address this through selective photoexcitation species expressing wavelength-specific chromophores,...

The therapeutic application of blue light (380 – 500nm) has garnered considerable attention in recent years as it offers a non-invasive approach for the management prevalent skin conditions including acne vulgaris and atopic dermatitis. These are often characterised by an imbalance microbial communities that colonise our skin, termed microbiome. In vulgaris, is thought to address this through selective photoexcitation species expressing wavelength-specific chromophores, differentially...

Abstract This study introduces and compares the lasing performance of micron‐sized sphere‐shaped supraparticle (SP) lasers fabricated through bottom‐up assembly II‐VI semiconductor colloidal quantum wells (CQWs) with their counterparts made dots (CQDs). CQWs consist a 4‐monolayers thick CdSe core an 8‐monolayers Cd x Zn 1‐ S shell nominal size 14 × 15 4.2 nm, CQDs CdS Se /ZnS 6 nm diameter. SPs are optically characterized 0.76 ns pulse laser (spot size: 2.88 10 −7 cm 2 ) at 532 emit in...

Supraparticles comprising semiconductor colloidal quantum dots as building blocks are a new class of microscopic lasers with wide host applications, including photocatalysis, biological and environmental sensing, integrated photonics, medicine. Despite the recent advances in their fabrication, there have been no reports dot components being recovered for use circular economy. Herein, we demonstrate novel method recycling these whispering-gallery-mode supraparticle recovery yield 85%. The...

Conveyor-mode shuttling is a key approach for implementing intermediate-range coupling between electron-spin qubits in quantum dots. Initial results are encouraging; however, long trajectories guaranteed to encounter regions of low conduction-band valley energy splittings, due the presence random-alloy disorder Si/SiGe wells. Here, we theoretically explore two schemes avoiding valley-state excitations at these minima, by allowing electrons detour around them. The multichannel scheme allows...

A semiconductor microsphere laser based on colloidal nanoplatelets is demonstrated comprising a micron-sized supraparticle obtained by self-assembly of core/shell CdSe/ CdS with peak luminescence at 660nm. It shows multimode emission between 665 and 695nm threshold 200 nJ (28 ± 17 mJ.cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-2</sup> ).

This study investigates the luminescence efficiency of red-emitting quantum-dots in supraparticles, a new type microscopic photonic source. We demonstrate that compound created by incorporating higher-bandgap quantum dots their design, reduce energy transfer losses and increase dot efficiency.