scholarly journals State-of-the-Art and Trends in Synthesis, Properties, and Application of Quantum Dots-Based Nanomaterials

2019 ◽  
Vol 36 (2) ◽  
pp. 1800302 ◽  
Author(s):  
Mohammadreza Alizadeh-Ghodsi ◽  
Mohammad Pourhassan-Moghaddam ◽  
Ali Zavari-Nematabad ◽  
Brian Walker ◽  
Nasim Annabi ◽  
...  
Keyword(s):  
Quantum Dots ◽  
State Of The Art ◽  
Synthesis Properties

scholarly journals Designing of Nanomaterials-Based Enzymatic Biosensors: Synthesis, Properties, and Applications

Electrochem ◽  
2021 ◽  
Vol 2 (1) ◽  
pp. 149-184
Author(s):  
Francisco T. T. Cavalcante ◽  
Italo R. R. de A. Falcão ◽  
José E. da S. Souza ◽  
Thales G. Rocha ◽  
Isamayra G. de Sousa ◽  
...  
Keyword(s):  
Enzyme Immobilization ◽  
State Of The Art ◽  
Volume Ratio ◽  
The State ◽  
Future Research ◽  
Synthesis Properties ◽  
Signal Response ◽  
Enzymatic Biosensors ◽  
The Many ◽  
Biological Entities

Among the many biological entities employed in the development of biosensors, enzymes have attracted the most attention. Nanotechnology has been fostering excellent prospects in the development of enzymatic biosensors, since enzyme immobilization onto conductive nanostructures can improve characteristics that are crucial in biosensor transduction, such as surface-to-volume ratio, signal response, selectivity, sensitivity, conductivity, and biocatalytic activity, among others. These and other advantages of nanomaterial-based enzymatic biosensors are discussed in this work via the compilation of several reports on their applications in different industrial segments. To provide detailed insights into the state of the art of this technology, all the relevant concepts around the topic are discussed, including the properties of enzymes, the mechanisms involved in their immobilization, and the application of different enzyme-derived biosensors and nanomaterials. Finally, there is a discussion around the pressing challenges in this technology, which will be useful for guiding the development of future research in the area.

scholarly journals Synthesis, Properties and Bioimaging Applications of Silver-Based Quantum Dots

2021 ◽  
Vol 22 (22) ◽  
pp. 12202
Author(s):  
Mariya Borovaya ◽  
Inna Horiunova ◽  
Svitlana Plokhovska ◽  
Nadia Pushkarova ◽  
Yaroslav Blume ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Near Infrared ◽  
Semiconductor Nanocrystals ◽  
Current Status ◽  
Synthesis Properties ◽  
Semiconductor Nanomaterials ◽  
Electrooptical Properties ◽  
Basic Features

Ag-based quantum dots (QDs) are semiconductor nanomaterials with exclusive electrooptical properties ideally adaptable for various biotechnological, chemical, and medical applications. Silver-based semiconductor nanocrystals have developed rapidly over the past decades. They have become a promising luminescent functional material for in vivo and in vitro fluorescent studies due to their ability to emit at the near-infrared (NIR) wavelength. In this review, we discuss the basic features of Ag-based QDs, the current status of classic (chemical) and novel methods (“green” synthesis) used to produce these QDs. Additionally, the advantages of using such organisms as bacteria, actinomycetes, fungi, algae, and plants for silver-based QDs biosynthesis have been discussed. The application of silver-based QDs as fluorophores for bioimaging application due to their fluorescence intensity, high quantum yield, fluorescent stability, and resistance to photobleaching has also been reviewed.

Synthesis, Properties and Application of All-inorganic Perovskite Quantum Dots

2020 ◽  
Vol 41 (2) ◽  
pp. 117-133
Author(s):  
刘王宇 LIU Wang-yu ◽  
陈 斐 CHEN Fei ◽  
孔淑祺 KONG Shu-qi ◽  
唐爱伟 TANG Ai-wei
Keyword(s):  
Quantum Dots ◽  
Inorganic Perovskite ◽  
Synthesis Properties ◽  
Perovskite Quantum Dots

scholarly journals Multimaterial 3D laser microprinting using an integrated microfluidic system

2019 ◽  
Vol 5 (2) ◽  
pp. eaau9160 ◽  
Author(s):  
Frederik Mayer ◽  
Stefan Richter ◽  
Johann Westhauser ◽  
Eva Blasco ◽  
Christopher Barner-Kowollik ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Fluorescent Dyes ◽  
State Of The Art ◽  
Three Dimensional ◽  
Microfluidic System ◽  
Laser Lithography ◽  
Microfluidic Chamber ◽  
Constituent Material ◽  
Printing System ◽  
Available Technology

Three-dimensional (3D) laser micro- and nanoprinting has become a versatile, reliable, and commercially available technology for the preparation of complex 3D architectures for diverse applications. However, the vast majority of structures published so far have been composed of only a single constituent material. Here, we present a system based on a microfluidic chamber integrated into a state-of-the-art laser lithography apparatus. This system is scalable in terms of the number of materials and eliminates the need to go back and forth between the lithography instrument and the chemistry room numerous times, with tedious realignment steps in between. As an application, we present 3D deterministic microstructured security features requiring seven different liquids: a nonfluorescent photoresist as backbone, two photoresists containing different fluorescent quantum dots, two photoresists with different fluorescent dyes, and two developers. Our integrated microfluidic 3D printing system opens the door to truly multimaterial 3D additive manufacturing on the micro- and nanoscale.

Growth, Spectroscopy, and Laser Application of Self-Ordered III-V Quantum Dots

MRS Bulletin ◽  
1998 ◽  
Vol 23 (2) ◽  
pp. 31-34 ◽  
Author(s):  
D. Bimberg ◽  
M. Grundmann ◽  
N.N. Ledentsov
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
State Of The Art ◽  
Laser Diodes ◽  
Threshold Current ◽  
High Gain ◽  
Gain Medium ◽  
Modern Technology ◽  
High Quantum Efficiency ◽  
Light Emitting

The development and application of semiconductor light-emitting and laser diodes has been a huge success during the last 30 years in key areas of modern technology like communications, recording, and printing. Still there is ample room for improvement through combination of the atomlike properties for zero-dimensionally localized carriers in quantum dots (QDs) with state-of-the-art semiconductor-laser technology. Low, temperature-insensitive threshold current; high gain; and differential gain have been predicted since the early 1980s.In the past two decades, the fabrication of QDs has been attempted using colloidal techniques (see the article by Nozik and Mićić in this issue), patterning, etching, and layer fluctuations (see the article by Gammon in this issue). However a break-through occurred recently through the employment of self-ordering mechanisms during epitaxy of lattice-mismatched materials (see the next section) for the creation of high-density arrays of QDs that exhibit excellent optical properties, particularly high quantum efficiency, up to room temperature. The zero-dimensional carrier confinement and subsequent atomlike electronic properties have a drastic impact on optical properties (see the section on Spectroscopy). Also intimately connected is the applicability of QDs as a novel gain medium in state-of-the-art laser diodes with superior properties (see the section on Lasers).

Carbon Quantum Dots: Chemical Synthesis, Properties and Applications

2015 ◽  
Vol 7 (4) ◽  
pp. 1306-1346 ◽  
Author(s):  
Cláudia Emanuele Machado ◽  
Kayo O. Vieira ◽  
Jefferson Luis Ferrari ◽  
Marco Antônio Schiavon
Keyword(s):  
Quantum Dots ◽  
Chemical Synthesis ◽  
Carbon Quantum Dots ◽  
Synthesis Properties

Quantum Dots-Converted Light-Emitting Diodes Packaging for Lighting and Display: Status and Perspectives

2016 ◽  
Vol 138 (2) ◽  
Author(s):  
Bin Xie ◽  
Run Hu ◽  
Xiaobing Luo
Keyword(s):  
Quantum Dots ◽  
Polymer Matrix ◽  
Experimental Validation ◽  
Light Emitting Diodes ◽  
State Of The Art ◽  
Thermal Quenching ◽  
Surface Damage ◽  
Light Emitting ◽  
Color Rendering ◽  
Excellent Color

Recent years, semiconductor quantum dots (QDs) have attracted tremendous attentions for their unique characteristics for solid-state lighting (SSL) and thin-film display applications. The pure and tunable spectra of QDs make it possible to simultaneously achieve excellent color-rendering properties and high luminous efficiency (LE) when combining colloidal QDs with light-emitting diodes (LEDs). Due to its solution-based synthetic route, QDs are impractical for fabrication of LED. QDs have to be incorporated into polymer matrix, and the mixture is dispensed into the LED mold or placed onto the LED to fabricate the QD–LEDs, which is known as the packaging process. In this process, the compatibility of QDs' surface ligands with the polymer matrix should be ensured, otherwise the poor compatibility can lead to agglomeration or surface damage of QDs. Besides, combination of QDs–polymer with LED chip is a key step that converts part of blue light into other wavelengths (WLs) of light, so as to generate white light in the end. Since QD-LEDs consist of three or more kinds of QDs, the spectra distribution should be optimized to achieve a high color-rendering ability. This requires both theoretical spectra optimization and experimental validation. In addition, to prolong the reliability and lifetime of QD-LEDs, QDs have to be protected from oxygen and moisture penetration. And the heat generation inside the package should be well controlled because high temperature results in QDs' thermal quenching, consequently deteriorates QD-LEDs' performance greatly. Overall, QD-LEDs' packaging and applications present the above-mentioned technical challenges. A profound and comprehensive understanding of these problems enables the advancements of QD-LEDs' packaging processes and designs. In this review, we summarized the recent progress in the packaging of QD-LEDs. The wide applications of QD-LEDs in lighting and display were overviewed, followed by the challenges and the corresponding progresses for the QD-LEDs' packaging. This is a domain in which significant progress has been achieved in the last decade, and reporting on these advances will facilitate state-of-the-art QD-LEDs' packaging and application technologies.

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