Quantum Dots: A Primer:
TL;DR: In this paper, the authors compared the electronic structure of molecules and solid-state materials such as semiconductors, and found that molecules have the same energy gap as insulators.
read more
Abstract: C rystalline inorganic so lids can be divided electronically into three well-known classes: metals, semiconductors, and insulators. In these extended solids, atomic orbitals overlap to give nearly continuous electronic energy levels known as bands.1 Metals are electronically characterized by having a partially lled band; semiconductors have a lled band (the valence band) separated from the (mostly) empty conduction band by a bandgap Eg, corresponding to the familiar HOMOLUMO energy gap for small molecules. Insulators are conceptually the same as semiconductors in their electronic structure, except that the bandgap is larger in insulators (Fig. 1). In terms of Egs, metals have Eg less than ;0.1 eV; semiconductors have Egs from ;0.5 to ;3.5 eV; and insulators have Eg . ;4 eV. (1 eV 5 1.602 3 10219 J 5 8065.5 cm21). There are some key differences, however, between the electronic structure of molecules and solid-state materials such as semiconductors.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Conjugated polymer-based organic solar cells
TL;DR: This review gives a general introduction to the materials, production techniques, working principles, critical parameters, and stability of the organic solar cells, and discusses the alternative approaches such as polymer/polymer solar cells and organic/inorganic hybrid solar cells.
6.4K
Plasmonics in Biology and Plasmon-Controlled Fluorescence
TL;DR: It appears possible that the use of plasmon-controlled fluorescence will allow construction of wide-field optical microscopy with subwavelength spatial resolution down to 25 nm, and it is predicted that PCF will result in a new generation of probes and devices.
Chemical sensing and imaging with metallic nanorods.
Catherine J. Murphy,Anand Gole,Simona E. Hunyadi,John W. Stone,Patrick N. Sisco,Alaaldin M. Alkilany,Brian E. Kinard,Patrick L. Hankins +7 more
TL;DR: This Feature Article examines recent advances in chemical analyte detection and optical imaging applications using gold and silver nanoparticles, with a primary focus on the authors' own work.
576
Quantum Dots in Bioanalysis: A Review of Applications across Various Platforms for Fluorescence Spectroscopy and Imaging
TL;DR: This review highlights recent developments in QDs in bioanalysis and bioimaging in the context of specific methods for fluorescence spectroscopy and imaging, and surveys the use of QDs across different platforms for biological fluorescence imaging.
566
The use of luminescent quantum dots for optical sensing
TL;DR: In this paper, the authors review progress in exploiting the attractive luminescent properties of quantum dot nanocrystals in designing novel probes for chemical and biochemical optical sensing, and present a survey of the state of the art.
546
References
Semiconductor Clusters, Nanocrystals, and Quantum Dots
TL;DR: In this article, the authors focus on the properties of quantum dots and their ability to join the dots into complex assemblies creates many opportunities for scientific discovery, such as the ability of joining the dots to complex assemblies.
11.6K
•Book
Photonic Crystals: Molding the Flow of Light
John D. Joannopoulos,Steven G. Johnson,Joshua N. Winn,Robert D. Meade +3 more
- 03 Jul 1995
TL;DR: In this paper, the authors developed the theoretical tools of photonics using principles of linear algebra and symmetry, emphasizing analogies with traditional solid-state physics and quantum theory, and investigated the unique phenomena that take place within photonic crystals at defect sites and surfaces, from one to three dimensions.
10.1K
Synthesis and characterization of nearly monodisperse CdE (E = sulfur, selenium, tellurium) semiconductor nanocrystallites
TL;DR: In this paper, a simple route to the production of high-quality CdE (E=S, Se, Te) semiconductor nanocrystallites is presented, based on pyrolysis of organometallic reagents by injection into a hot coordinating solvent.
9.2K
Room-temperature ultraviolet nanowire nanolasers
Michael H. Huang,Samuel S. Mao,Henning Feick,Haoquan Yan,Yiying Wu,Hannes Kind,Eicke R. Weber,Richard E. Russo,Peidong Yang,Peidong Yang +9 more
TL;DR: Room-temperature ultraviolet lasing in semiconductor nanowire arrays has been demonstrated and self-organized, <0001> oriented zinc oxide nanowires grown on sapphire substrates were synthesized with a simple vapor transport and condensation process.
9.2K
Semiconductor Nanocrystals as Fluorescent Biological Labels
TL;DR: Semiconductor nanocrystals prepared for use as fluorescent probes in biological staining and diagnostics have a narrow, tunable, symmetric emission spectrum and are photochemically stable.
8.9K