Understanding the Enhanced Kinetics of Enzyme-Quantum Dot Constructs

MRS Advances ◽  
2015 ◽  
Vol 1 (57) ◽  
pp. 3831-3836 ◽  
Author(s):  
Joyce Breger ◽  
Scott Walper ◽  
Mario Ancona ◽  
Michael Stewart ◽  
Eunkeu Oh ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Nerve Agent ◽  
Medical Diagnostics ◽  
Threat Detection ◽  
Hybrid Architectures ◽  
Enzyme Systems ◽  
Device Applications ◽  
Mechanistic Understanding ◽  
Kinetics Of

ABSTRACTBio-inspired, hybrid architectures employing quantum dots (QDs) appended with functionally active biomolecules such as enzymes have the potential to be utilized in numerous applications. Some examples include nanosensors for medical diagnostics, chemical/biological threat detection, as well as “bio-factories” in complex industrial synthetic processes. The main advantage in creating these nanofactories is increased rates in catalysis and efficiency when enzymes are associated with nanoscaffolds, as shown in numerous studies. However, the mechanism for this enhancement remains elusive. Gaining a fundamental, mechanistic understanding of enzyme-QD nanostructures is important in the development of numerous device applications. In this work, we review an array of enzymes attached to QDs and generate a hypothesis in regards to the unique architecture of the enzyme-nanoparticle (NP) construct that leads to increases in catalysis. We highlight work with phosphotiresterase (PTE) attached to two distinctly sized QDs in neutralizing a simulant nerve agent, as well as in other enzyme systems.

A facile method to study the bioaccumulation kinetics of amorphous silica nanoparticles by quantum dot embedding

2018 ◽  
Vol 5 (12) ◽  
pp. 2830-2841
Author(s):  
Xiao-Mei Zang ◽  
Jia-Ming Li ◽  
Ying Wang ◽  
Yue-Yue Liu ◽  
Zhong-Bo Wei ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Silica Nanoparticles ◽  
Amorphous Silica ◽  
Kinetics Of

A facile method was developed to study the bioaccumulation kinetics of amorphous silica nanoparticles (AmSiNPs) by embedding the particles with quantum dots (QDs) and then using Cd as the tracer.

scholarly journals Atomic Ordering in Self-assembled Epitaxial and Endotaxial Compound and Element Semiconductor Quantum Dot Structures: The First Review

2003 ◽  
Vol 776 ◽  
Author(s):  
Peter Möck
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Information Storage ◽  
Atomic Ordering ◽  
Transmission Electron ◽  
Device Applications ◽  
Random Alloy ◽  
Self Assembled ◽  
Electron Microscopical ◽  
Alloy Quantum Dots

AbstractAlthough the main international research thrust on self-assembled epitaxial semiconductor quantum dots is currently being directed towards random alloy quantum dots, the suggestion is made that atomically ordered quantum dots which are grown by either epitaxy or endotaxy may in addition to their larger quantum confinement potentials possess superior long term structural stability. Such atomically ordered quantum dots should, therefore, be superior to random alloy quantum dots as far as prospective device applications are concerned. The basis for this suggestion is simple thermodynamic considerations. These considerations seem to explain our transmission electron microscopical observations of epitaxially grown atomically ordered In(Sb,As), (In,Ga)Sb, (Cd,Zn)Se, (Cd,Mn,Zn)Se quantum dots and Pb(Se,Te) quantum dot predecessor islands. Atomic ordering in (In,Ga)P quantum dot structures, as recently observed by other authors, does not seem to contradict our thermodynamic considerations. Endotaxially grown atomically ordered (In,Si,As) and (Sn,Si) quantum dots in Si matrices are briefly discussed as an even more unconventional approach to nanostructures with applications in electronics, photonics, information storage, and sensing.

NUMERICAL STUDY OF QUANTUM DOT SPECTRUM CALCULATION ON THE BASE OF MONTE CARLO METHOD

2019 ◽  
Vol 6 (3) ◽  
pp. 74-79
Author(s):  
Alexander Mikhailovich Popov
Keyword(s):  
Numerical Simulation ◽  
Quantum Dots ◽  
Monte Carlo ◽  
Monte Carlo Method ◽  
Quantum Dot ◽  
Numerical Study ◽  
Molecular System ◽  
Small Region ◽  
Medical Diagnostics

The work is directed to numerical simulation of quantum dots spectrum for molecular nanostructure of small size for creation of new nanotechnology. Quantum dots are the small peaces of semiconductor which presents the molecular system heterostucture. The cariers of charge are confined in small region. The main acsent is made on development of effective method for determination of eigenfuncions and eigenvalues of quantum dot. Quantum dots are used in nanoelectronics, in bio-sensors of nanosize, and in the systems of medical diagnostics of high precision.

Electrically driven assembly of CdTe quantum dots into photoconductive microwires

2015 ◽  
Vol 3 (8) ◽  
pp. 1645-1648 ◽  
Author(s):  
Gaurav Maheshwari ◽  
Mona Mittal ◽  
Sameer Sapra ◽  
Shalini Gupta
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Low Cost ◽  
Optoelectronic Device ◽  
Low Energy ◽  
Cdte Quantum Dots ◽  
One Dimensional ◽  
Device Applications ◽  
Nanocrystal Assembly

Low energy, low cost quantum dot nanocrystal assembly into one-dimensional microwires for optoelectronic device applications.

NiAg-graphene quantum dot-graphene hybrid with high oxidase-like catalytic activity for sensitive colorimetric detection of malathion

2021 ◽  
Author(s):  
Xu Dan ◽  
Ruiyi Li ◽  
Qinsheng Wang ◽  
Yongqiang Yang ◽  
Haiyan Zhu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Catalytic Activity ◽  
Quantum Dot ◽  
Colorimetric Detection ◽  
Graphene Quantum Dots ◽  
Functionalized Graphene ◽  
Graphene Quantum Dot ◽  
Nickel Silver

The paper reports the synthesis of nickel-silver-graphene quantum dot-graphene hybrid. Histidine-functionalized graphene quantum dots (His-GQDs) were bonded to graphene oxide (GO) and then combined with Ni2+ and Ag+ to form...

scholarly journals Effect of Growth Temperature on the Characteristics of CsPbI3-Quantum Dots Doped Perovskite Film

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4439
Author(s):  
Shui-Yang Lien ◽  
Yu-Hao Chen ◽  
Wen-Ray Chen ◽  
Chuan-Hsi Liu ◽  
Chien-Jung Huang
Keyword(s):  
Thin Films ◽  
Thermal Stability ◽  
Quantum Dots ◽  
Quantum Dot ◽  
Growth Temperature ◽  
Electron Mobility ◽  
Surface Defects ◽  
Different Temperatures ◽  
Pb Doping ◽  
Pristine Film

In this study, adding CsPbI3 quantum dots to organic perovskite methylamine lead triiodide (CH3NH3PbI3) to form a doped perovskite film filmed by different temperatures was found to effectively reduce the formation of unsaturated metal Pb. Doping a small amount of CsPbI3 quantum dots could enhance thermal stability and improve surface defects. The electron mobility of the doped film was 2.5 times higher than the pristine film. This was a major breakthrough for inorganic quantum dot doped organic perovskite thin films.

Carbon quantum dot-sensitized hollow TiO2 spheres for high-performance visible light photocatalysis

2021 ◽  
Author(s):  
Xianfeng Zhang ◽  
Zongqun Li ◽  
Shaowen Xu ◽  
Yaowen Ruan
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
High Performance ◽  
Carbon Quantum Dots ◽  
Visible Light Photocatalysis ◽  
Carbon Quantum Dot ◽  
Visible Light Photocatalytic

TiO2/CQD composites were synthesized through carbon quantum dots covalently attached to the surface of hollow TiO2 spheres for visible light photocatalytic degradation of organics.

scholarly journals Flexible and efficient perovskite quantum dot solar cells via hybrid interfacial architecture

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Long Hu ◽  
Qian Zhao ◽  
Shujuan Huang ◽  
Jianghui Zheng ◽  
Xinwei Guan ◽  
...  
Keyword(s):  
Thin Film ◽  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
High Performance ◽  
Mechanical Stability ◽  
Mechanical Adhesion ◽  
Perovskite Quantum Dots ◽  
Efficient Charge ◽  
Photovoltaic Technologies

AbstractAll-inorganic CsPbI3 perovskite quantum dots have received substantial research interest for photovoltaic applications because of higher efficiency compared to solar cells using other quantum dots materials and the various exciting properties that perovskites have to offer. These quantum dot devices also exhibit good mechanical stability amongst various thin-film photovoltaic technologies. We demonstrate higher mechanical endurance of quantum dot films compared to bulk thin film and highlight the importance of further research on high-performance and flexible optoelectronic devices using nanoscale grains as an advantage. Specifically, we develop a hybrid interfacial architecture consisting of CsPbI3 quantum dot/PCBM heterojunction, enabling an energy cascade for efficient charge transfer and mechanical adhesion. The champion CsPbI3 quantum dot solar cell has an efficiency of 15.1% (stabilized power output of 14.61%), which is among the highest report to date. Building on this strategy, we further demonstrate a highest efficiency of 12.3% in flexible quantum dot photovoltaics.

65‐3: Quantum Dot Light‐emitting Diodes with High Color Purity RGB Cadmium‐Free Quantum Dots

2021 ◽  
Vol 52 (1) ◽  
pp. 953-956
Author(s):  
Tatsuya Ryowa ◽  
Yusuke Sakakibara ◽  
Tadashi Kobashi ◽  
Keisuke Kitano ◽  
Masaya Ueda ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Light Emitting Diodes ◽  
Color Purity ◽  
Light Emitting ◽  
High Color Purity

Enhanced Normal-Incident Absorption of Quantum-Dot Infrared Photodetectors With Smaller Quantum Dots

2008 ◽  
Vol 20 (14) ◽  
pp. 1240-1242 ◽  
Author(s):  
Chi-Che Tseng ◽  
Shu-Ting Chou ◽  
Yi-Hao Chen ◽  
Cheng-Nan Chen ◽  
Wei-Hsun Lin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Infrared Photodetectors ◽  
Quantum Dot Infrared Photodetectors
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