Dot sizes

Nano technology demystified is for anyone interested in the nanoscale world who wants to learn more about this exciting new area. It can also be used by home-schooled students, tutored students, and those people wanting to change careers. The material is presented in an easy-to-follow way and can best be understood when read from beginning to end. However, if you want more information on specific topics—for example, quantum dots, nanoelectronics, lab-on-a-chip, and so on—or you want to check out only nanotechnology business happenings, those chapters can be reviewed individually.

362p zizaybay1103 29-05-2024 6 2   Download

Carbon quantum dots (CQDs) are a new blooming carbon containing nanoparticles having size of less than 10 nm. They have wide range of application in the field of sensing of inorganic analytes, bio sensing, cell imaging, studying biological processes in living cells and also for drug delivery. T. In this review article we demonstrate how these tools are used to characterize newly synthesized CQDs, monitor the synthesis process along with finding its application in numerous fields.

26p dianmotminh02 03-05-2024 5 2   Download

Carbon nanodots (CNDs) are the latest nano-sized carbon materials having unique properties such as biocompatible, highly photoluminescent, and nontoxic which are suitable for diverse applications including lighting, sensing, bioimaging, and biochemical analyzing.

15p vijaychest 24-04-2024 7 2   Download

Ebook "Growth mechanisms and novel properties of silicon nanostructures from quantum-mechanical calculations" reviews the systematic theoretical studies in his group on the growth mechanisms and properties of silicon quantum dots, nanotubes and nanowires, including: mechanisms of oxide-assisted growth of silicon nanowires, energetic stability of pristine silicon nanowires and nanotubes, thermal stability of hydrogen terminated silicon nanostructures, size-dependent oxidation of hydrogen terminated silicon nanostructures.

72p nhanphanguyet 28-01-2024 5 2   Download

Carbon dots (CDs) are zero dimensional carbonaceous nanomaterials showing tremendous physicochemical and optical properties, synthesized from any organic precursors rich in carbon content. Due to their greater biocompatibility, non-toxicity, and tiny particle size up to 10 nm, CDs have numerous applications in the field of nano-sensing, bio-imaging, solar energy, light-emitting devices, photo-catalysis etc.

7p vijeff 30-11-2023 5 2   Download

We reported the fluorescence sensor of carbon dots (CDs) synthesized for the highly sensitive and selective detection of bilirubin in human urine. High-resolution transmission electron microscopy (HRTEM) images showed that the CDs have a spherical shape with a mean particle size of 2.6 nm.

9p viberbers 09-08-2023 4 3   Download

Ebook The ultimate digital library, where the new information players meet present the following contents: Chapter 1: strange bedfellows: libraries and their vendors; chapter 2: sizing up the dot-com competition; chapter 3: business challenges to library practices; chapter 4: business models for digital library services; chapter 5: sheep in wolves’ clothing: working inside and outside the library; chapter 6: libraries are not all business; chapter 7: first principles: patron privacy, anonymity, and confidentiality; chapter 8: radical notions and conclusions.

188p runthenight08 12-04-2023 2 2   Download

Carbon dots (CDs) are the most promising members of the carbon family with superior properties such as ultrasmall size, high solubility, low cytotoxicity, and inherent fluorescence endows their potential for diverse applications.

10p vicedric 08-02-2023 4 4   Download

In this study, colloidal CdS quantum dots were synthesized, structurally characterized, and their effect on performance of perovskite solar cells was observed by using them as interface modification agent between TiO2 /perovskite. Colloidal CdS quantum dots were synthesized based on two-phase method and characterized by X-ray diffraction and Transmission Electron Microscopy techniques. The average particle size of CdS quantum dots have found to be around 5 nm. Oleic acid was used as capping agent during synthesis to lead solubility in organic solvents.

7p langthannam 29-12-2021 20 1   Download

Nitrogen-doped carbon nanodots (CDs) were prepared via the solvothermal method, using urea and triethylene glycol as the starting materials. The as-prepared CDs had individual diameters of approximately 100 nm and were in clusters of different sizes. The surface composition and optical properties of the as-prepared CDs were characterized. They exhibited multicolor emission properties in the visible range when excited with a wide wavelength range. The aqueous solution of the CDs was used in highly sensitive tartrazine determination.

16p tudichquannguyet 29-11-2021 8 2   Download

Selection of tractor and implements has been very important aspect in farm mechanization because of availability of variety of tractor models ranging from 15 to 75 kW and variety of implement sizes in the market. The main purpose of the study was to develop a computer based decision support system which could be able to predict the size of tractor required for an implement and vice-versa for a selected soil type and soil conditions. The decision support system was developed in visual studio platform using visual basic dot net programming language as front end MS Access as backend.

9p angicungduoc5 14-06-2020 15 0   Download

The binding energy of exciton in quantum dots with a parabolic confinement potential was calculated by variational methods beyond the Kohn-Luttinger effective mass theory, when the central-cell correction was taken into account.We have assumed that a short range potential with two parameters for strength and range for exciton, representing the center-cell effect also depends on dot size. Our result is in good agreement with experiment.

6p 12120609 01-06-2020 10 1   Download

Single electron transistor (SET) is a key element in current research area of nanoelectronics and nanotechnology which can offer nano-feature size, low power consumption and high operating speed. SET is a new nanoscale switching device. It can control the motion of the single electron. The goal of this paper is to discuss about some physical properties of the SET and focuses on simulation of basic quantum device characteristics such as tunneling effect, Coulomb blockage, Quantum dot, Coulomb staircase, and Coulomb oscillation.

8p gildur 30-11-2019 29 0   Download

In this paper we present the construction of a highly sensitive FCS instrument and the measurement results from a sample of semiconductor quantum dots. We provide the analysis procedure for determining the hydrodynamic radius of the quantum dots and compare the results with the ones obtained directly from electron microscope imaging. The good agreement indicates the reliability of the FCS technique and open the way for further applications of this technique in studying nanoparticles.

7p thuyliebe 09-10-2018 34 1   Download

In this work, we present a facile and environmentally friendly synthesis of CQDs based on plasma - liquid interaction method. This is a single-step method and does not use toxic chemicals. The size distribution of obtained CQDs is rather uniform at approximately 3 nm. The emission peak of CQDs shifts from 427 nm to 523 nm as the excitation wavelength is varied from 340 nm to 460 nm. The non-equilibrium reactive chemistry of plasma liquid interaction is responsible for acceleration of the CQDs formation process.

6p thuyliebe 08-10-2018 38 1   Download

IF you look at a Map of the World, you will see, in the left-hand upper corner of the Eastern Hemisphere, two Islands lying in the sea. They are England and Scotland, and Ireland. England and Scotland form the greater part of these Islands. Ireland is the next in size. The little neighbouring islands, which are so small upon the Map as to be mere dots, are chiefly little bits of Scotland, - broken off, I dare say, in the course of a great length of time, by the power of the restless water.

202p nhokheo5 25-04-2013 46 3   Download

In this article, we report on the preparation of CdSe quantum dots (QDs) by sol-gel method and their optical properties. The average size of QDs is also estimated by using various ways, such as the Scherer’s formula, The Effros-Brus-Kayanuma’s theoretical expression, TEM etc. The TEM images of samples show that the mean sizes of QDs are 4 nm. The mean sizes of QDs are smaller than that of other methods and arranging from 2 to 3.6 nm.

5p tuanlocmuido 19-12-2012 60 3   Download

QDs play an important role mainly in the imaging and as highly fluorescent probes for biological sensing that have better sensitivity, longer stability, good biocompatibility, and minimum invasiveness. The fluorescent properties of QDs arise from the fact, that their excitation states/band gaps are spatially confined, which results in physical and optical properties intermediate between compounds and single molecules. Depending on chemical composition and the size of the core which determines the quantum confinement, the emission peak can vary from UV to NIR wavelengths (400–1350 nm).

181p bachduong1311 10-12-2012 66 2   Download

Cd1-xMnxS nanoparticles (NPs) with size quantum confinement belong to the diluted magnetic semiconductor (DMS) quantum dot (QD) class of materials that has been widely studied in the last few years. The study of quasi-zero-dimensional Diluted Magnetic Semiconductors (DMS), such as Cd1-xMnxS Quantum Dots (QDs), is strongly motivated due to the localization of magnetic ions in the same places as the free-like electron and hole carriers occurring in these nanomaterials [1,2].

208p maket1311 16-10-2012 48 8   Download

Tham khảo sách 'recent advances in nanofabrication techniques and applications', kỹ thuật - công nghệ, hoá học - dầu khí phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

362p cucdai_1 14-10-2012 95 14   Download