Enhanced absorption with quantum dots, metal nanoparticles, and 2D materials

2016 ◽  
Author(s):  
Ergun Simsek ◽  
Bablu Mukherjee ◽  
Asim Guchhait ◽  
Yin Thai Chan
Keyword(s):  
Quantum Dots ◽  
Metal Nanoparticles ◽  
2D Materials ◽  
Enhanced Absorption

Effect of Surface Plasmon Resonance on the Photoluminescence from Si Quantum Dot Structures for Third Generation Solar Cell Applications

2012 ◽  
Vol 1391 ◽  
Author(s):  
Supriya Pillai ◽  
Joel J. Hohn ◽  
Craig M. Johnson ◽  
Gavin J. Conibeer
Keyword(s):  
Quantum Dots ◽  
Metal Nanoparticles ◽  
Surface Plasmon ◽  
Self Assembly ◽  
Metal Layer ◽  
Resonance Excitation ◽  
Enhanced Absorption ◽  
Assembly Method ◽  
Low Dimensional ◽  
Silver Metal

ABSTRACTLow dimensional structures like quantum dots (QDs) offers the the ability to tune the absorption properties of standard semiconductor materials. However, QDs are relatively weak light absorbers and hence may benefit significantly from coupling with plasmonic modes in nearby metal structures. In the case of a Si QD absorber layer for photovoltaic applications, enhanced absorption would lead to improved power conversion efficiency. Silver metal nanoparticles (MNPs) were deposited on Si QD structures using the self-assembly method of evaporation and annealing. Room temperature photoluminescence (PL) measurements were used to study the surface plasmon (SP) enhanced emission from the samples. The results were compared to conventional metal back reflectors. Enhanced surface plasmon coupled emission (SPCE) from Si QDs in the vicinity of silver metal nanoparticles (MNPs) is observed with a good correlation between the enhancement and the resonance excitation. Quenching was observed from the same emitter layers placed in close proximity to thin flat silver reflector layers, indicating the importance of the spacer layer between a metal layer and the quantum dots in optimising enhancement. The results have implications for the design of SP-enhanced QD solar cells.

Trends in Nanotechnology for in vivo Cancer Diagnosis: Products and Patents

2020 ◽  
Vol 26 (18) ◽  
pp. 2167-2181
Author(s):  
Tatielle do Nascimento ◽  
Melanie Tavares ◽  
Mariana S.S.B. Monteiro ◽  
Ralph Santos-Oliveira ◽  
Adriane R. Todeschini ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Quantum Dots ◽  
Magnetic Resonance ◽  
Metal Nanoparticles ◽  
Cancer Diagnosis ◽  
Imaging Techniques ◽  
Tumor Detection ◽  
Abnormal Growth ◽  
Pharmaceutical Nanotechnology

Background: Cancer is a set of diseases formed by abnormal growth of cells leading to the formation of the tumor. The diagnosis can be made through symptoms’ evaluation or imaging tests, however, the techniques are limited and the tumor detection may be late. Thus, pharmaceutical nanotechnology has emerged to optimize the cancer diagnosis through nanostructured contrast agent’s development. Objective: This review aims to identify commercialized nanomedicines and patents for cancer diagnosis. Methods: The databases used for scientific articles research were Pubmed, Science Direct, Scielo and Lilacs. Research on companies’ websites and articles for the recognition of commercial nanomedicines was performed. The Derwent tool was applied for patent research. Results: This article aimed to research on nanosystems based on nanoparticles, dendrimers, liposomes, composites and quantum dots, associated to imaging techniques. Commercialized products based on metal and composite nanoparticles, associated with magnetic resonance and computed tomography, have been observed. The research conducted through Derwent tool displayed a small number of patents using nanotechnology for cancer diagnosis. Among these patents, the most significant number was related to the use of systems based on metal nanoparticles, composites and quantum dots. Conclusion: Although few systems are found in the market and patented, nanotechnology appears as a promising field for the development of new nanosystems in order to optimize and accelerate the cancer diagnosis.

Heterostructures of 2D materials-quantum dots (QDs) for optoelectronic devices: challenges and opportunities

2021 ◽  
Author(s):  
Sudesh Yadav ◽  
Satya Ranjan Jena ◽  
Bhavya M.B. ◽  
Ali Altaee ◽  
Manav Saxena ◽  
...  
Keyword(s):  
Quantum Dots ◽  
2D Materials ◽  
Optoelectronic Devices ◽  
Challenges And Opportunities

scholarly journals Quick extracellular biosynthesis of low-cadmium ZnxCd1−xS quantum dots with full-visible-region tuneable high fluorescence and its application potential assessment in cell imaging

RSC Advances ◽  
2021 ◽  
Vol 11 (35) ◽  
pp. 21813-21823
Author(s):  
Shiyue Qi ◽  
Ji Chen ◽  
Xianwei Bai ◽  
Yahui Miao ◽  
Shuhui Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Saving ◽  
Metal Nanoparticles ◽  
Cell Imaging ◽  
Visible Region ◽  
Extracellular Biosynthesis ◽  
Application Potential ◽  
Good Biocompatibility ◽  
High Fluorescence ◽  
Environmentally Sound

The biosynthesis of metal nanoparticles/QDs has been universally recognized as environmentally sound and energy-saving, generating less pollution and having good biocompatibility, which is most needed in biological and medical fields.

Graphene Quantum Dots Assisted Exfoliation of Atomically-thin 2D Materials and As-formed 0D/2D van der Waals Heterojunction for HER

Carbon ◽  
2021 ◽  
Author(s):  
Jun Gong ◽  
Zheye Zhang ◽  
Zhiping Zeng ◽  
Wenjun Wang ◽  
Lingxuan Kong ◽  
...  
Keyword(s):  
Quantum Dots ◽  
2D Materials ◽  
Van Der Waals ◽  
Graphene Quantum Dots

scholarly journals Formation of non-classical optical states in spaser systems under control of an external magnetic field

2019 ◽  
Vol 220 ◽  
pp. 03017
Author(s):  
Mikhail Gubin ◽  
Alexei Prokhorov
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
External Magnetic Field ◽  
Metal Nanoparticles ◽  
Quantum Dynamics ◽  
Semiconductor Quantum Dots ◽  
Exciton Interaction ◽  
Photon States

The work is focused on the investigation of features of quantum dynamics for photons in spaser systems consisting of metal nanoparticles (NP) and semiconductor quantum dots (QDs). The non-classical photon states generation in a three-particle spaser system with nonlinear plasmon-exciton interaction is predicted.

Affinity Immobilization of Semiconductor Quantum Dots and Metal Nanoparticles on Cellulose Paper Substrates

2020 ◽  
Vol 12 (47) ◽  
pp. 53462-53474
Author(s):  
Hyungki Kim ◽  
Michael V. Tran ◽  
Eleonora Petryayeva ◽  
Olga Solodova ◽  
Kimihiro Susumu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Metal Nanoparticles ◽  
Semiconductor Quantum Dots ◽  
Cellulose Paper ◽  
Affinity Immobilization ◽  
Paper Substrates
Sign in / Sign up

Export Citation Format

Share Document