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Статті в журналах з теми "Spherical quantum dots"

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Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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1

Kaputkina, N. E., and Yu E. Lozovik. "“Spherical” quantum dots." Physics of the Solid State 40, no. 11 (November 1998): 1935–36. http://dx.doi.org/10.1134/1.1130690.

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2

Fomin, V. M., V. N. Gladilin, J. T. Devreese, E. P. Pokatilov, S. N. Balaban, and S. N. Klimin. "Photoluminescence of spherical quantum dots." Physical Review B 57, no. 4 (January 15, 1998): 2415–25. http://dx.doi.org/10.1103/physrevb.57.2415.

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3

Harry, S. T., and M. A. Adekanmbi. "CONFINEMENT ENERGY OF QUANTUM DOTS AND THE BRUS EQUATION." International Journal of Research -GRANTHAALAYAH 8, no. 11 (December 16, 2020): 318–23. http://dx.doi.org/10.29121/granthaalayah.v8.i11.2020.2451.

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Анотація:

A review of the ground state confinement energy term in the Brus equation for the bandgap energy of a spherically shaped semiconductor quantum dot was made within the framework of effective mass approximation. The Schrodinger wave equation for a spherical nanoparticle in an infinite spherical potential well was solved in spherical polar coordinate system. Physical reasons in contrast to mathematical expediency were considered and solution obtained. The result reveals that the shift in the confinement energy is less than that predicted by the Brus equation as was adopted in most literatures.

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4

Jia, Rui, De-Sheng Jiang, Ping-Heng Tan, and Bao-Quan Sun. "Quantum dots in glass spherical microcavity." Applied Physics Letters 79, no. 2 (July 9, 2001): 153–55. http://dx.doi.org/10.1063/1.1380732.

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5

Casado, E., and C. Trallero-giner. "Electrooptical constants in spherical quantum dots." physica status solidi (b) 196, no. 2 (August 1, 1996): 335–46. http://dx.doi.org/10.1002/pssb.2221960208.

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6

Zhu, Jia-Lin, Jie-Hua Zhao, Wen-Hui Duan, and Bing-Lin Gu. "D−centers in spherical quantum dots." Physical Review B 46, no. 12 (September 15, 1992): 7546–50. http://dx.doi.org/10.1103/physrevb.46.7546.

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7

Thao, Dinh Nhu, and Le Thi Ngoc Bao. "Quantum beat of excitons in spherical semiconductor quantum dots." Superlattices and Microstructures 146 (October 2020): 106675. http://dx.doi.org/10.1016/j.spmi.2020.106675.

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8

Fai, Teboul, Monteil, and Maabou. "POLARON IN CYLINDRICAL AND SPHERICAL QUANTUM DOTS." Condensed Matter Physics 7, no. 1 (2004): 157. http://dx.doi.org/10.5488/cmp.7.1.157.

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9

Garagiola, Mariano, and Omar Osenda. "Excitonic states in spherical layered quantum dots." Physica E: Low-dimensional Systems and Nanostructures 116 (February 2020): 113755. http://dx.doi.org/10.1016/j.physe.2019.113755.

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10

Marín, J. L., R. Riera, and S. A. Cruz. "Confinement of excitons in spherical quantum dots." Journal of Physics: Condensed Matter 10, no. 6 (February 16, 1998): 1349–61. http://dx.doi.org/10.1088/0953-8984/10/6/017.

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11

Nann, Thomas, and Paul Mulvaney. "Single Quantum Dots in Spherical Silica Particles." Angewandte Chemie International Edition 43, no. 40 (October 11, 2004): 5393–96. http://dx.doi.org/10.1002/anie.200460752.

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12

Comas, F., and A. Odriazola. "SO phonons in spherical nanostructured quantum dots." physica status solidi (b) 242, no. 6 (May 2005): 1267–78. http://dx.doi.org/10.1002/pssb.200440005.

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13

Nekoueian, Khadijeh, Mandana Amiri, Mika Sillanpää, Frank Marken, Rabah Boukherroub, and Sabine Szunerits. "Carbon-based quantum particles: an electroanalytical and biomedical perspective." Chemical Society Reviews 48, no. 15 (2019): 4281–316. http://dx.doi.org/10.1039/c8cs00445e.

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Анотація:

Carbon-based quantum particles, especially spherical carbon quantum dots (CQDs) and nanosheets like graphene quantum dots (GQDs), are an emerging class of quantum dots with unique properties owing to their quantum confinement effect.

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14

Moreira, N. L., Ladir Cândido, J. N. Teixeira Rabelo, and G. E. Marques. "A quantum Monte Carlo study of hardwall spherical quantum dots." Semiconductor Science and Technology 24, no. 7 (June 2, 2009): 075009. http://dx.doi.org/10.1088/0268-1242/24/7/075009.

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15

Bilynskyi, I. V., R. Ya Leshko, and H. O. Bandura. "Influence of quantum dot shape on energy spectra of three-dimensional quantum dots superlattices." Physics and Chemistry of Solid State 21, no. 4 (December 30, 2020): 584–90. http://dx.doi.org/10.15330/pcss.21.4.584-590.

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Анотація:

The band spectrum of quantum dots superlattices of different shapes at points of high symmetry is determined. Cubic, cylindrical and spherical quantum dots are considered. The width of the minizone is calculated. The dependences of the minizones on the geometric dimensions of quantum dots and their concentration are established.

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16

Taqi, A. "A theoretical model for exciton binding energies in rectangular and parabolic spherical finite quantum dots." Semiconductor Physics Quantum Electronics and Optoelectronics 15, no. 4 (December 12, 2012): 365–69. http://dx.doi.org/10.15407/spqeo15.04.365.

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17

Szafran, B., J. Adamowski, and B. Stébé. "Energy spectrum of centres in spherical quantum dots." Journal of Physics: Condensed Matter 10, no. 34 (August 31, 1998): 7575–86. http://dx.doi.org/10.1088/0953-8984/10/34/011.

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18

Satori, H., A. Sali, and K. Satori. "Polarizability of a polaron in spherical quantum dots." Physica E: Low-dimensional Systems and Nanostructures 14, no. 1-2 (April 2002): 184–89. http://dx.doi.org/10.1016/s1386-9477(02)00381-8.

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19

Garm, T. "Exciton states in spherical parabolic GaAs quantum dots." Journal of Physics: Condensed Matter 8, no. 31 (July 29, 1996): 5725–35. http://dx.doi.org/10.1088/0953-8984/8/31/006.

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20

Bondarenko, Victor, and Yang Zhao. "Resonant photoionization absorption spectra of spherical quantum dots." Journal of Physics: Condensed Matter 15, no. 9 (February 24, 2003): 1377–85. http://dx.doi.org/10.1088/0953-8984/15/9/301.

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21

Kupchak, I. M. "Excitons and trions in spherical semiconductor quantum dots." Semiconductor Physics, Quantum Electronics & Optoelectronics 9, no. 1 (March 1, 2006): 1–8. http://dx.doi.org/10.15407/spqeo9.01.001.

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22

Liao, Yu-Cheng, Shih-Yen Lin, Si-Chen Lee, and Chih-Ta Chia. "Spherical SiGe quantum dots prepared by thermal evaporation." Applied Physics Letters 77, no. 26 (December 25, 2000): 4328–29. http://dx.doi.org/10.1063/1.1334649.

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23

Menéndez-Proupin, E., C. Trallero-Giner, and A. García-Cristobal. "Resonant hyper-Raman scattering in spherical quantum dots." Physical Review B 60, no. 8 (August 15, 1999): 5513–22. http://dx.doi.org/10.1103/physrevb.60.5513.

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24

Li, Shuo, Lei Shi, and Zu-Wei Yan. "Optical properties of core/shell spherical quantum dots." Chinese Physics B 29, no. 9 (August 2020): 097802. http://dx.doi.org/10.1088/1674-1056/ab961a.

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25

Billaud, B., and T. T. Truong. "Some theoretical results on semiconductor spherical quantum dots." Computational Materials Science 49, no. 4 (October 2010): S322—S325. http://dx.doi.org/10.1016/j.commatsci.2010.04.010.

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26

Lakhal, L., F. Mezrag, and N. Bouarissa. "Quantum Confinement Effects on Physical Properties of ZnTe Spherical Quantum Dots." Acta Physica Polonica A 137, no. 4 (April 2020): 451–53. http://dx.doi.org/10.12693/aphyspola.137.451.

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27

HUANG, YUNG-SHENG, and SY-SANG LIAW. "LEVEL STABILITY OF THE QUANTUM DOTS WITH IMPURITY." Modern Physics Letters B 13, no. 27 (November 20, 1999): 977–81. http://dx.doi.org/10.1142/s0217984999001196.

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Анотація:

An atom located at the center of the constant spherical potential is adopted as a simple model for a quantum dot with impurity. We find that, under this model, the stability of the energy levels of a quantum dot with impurity can be controlled by adjusting either the size or the band gap of the quantum dot.

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28

Bondar, N. V., M. S. Brodyn, N. A. Matveevska, and T. Beynik. "Percolation Threshold and Luminescence in Films of Binary Mixtures of Spherical Particles Covered with Quantum Dots." Ukrainian Journal of Physics 62, no. 10 (November 2017): 874–82. http://dx.doi.org/10.15407/ujpe62.10.0874.

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29

Niculescu, Ecaterina C., and Ana Niculescu. "Donor States in Spherical GaAs-Ga1-xAlxAs Quantum Dots." Modern Physics Letters B 11, no. 15 (June 30, 1997): 673–79. http://dx.doi.org/10.1142/s0217984997000827.

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Анотація:

The effect of the central cell correction on the binding energies of shallow donors in a spherical GaAs-Ga 1-x Al x As quantum dot is studied. The effective-mass approximation within a variational scheme is adopted and central cell corrections are calculated by using a Coulomb potential modified with an adjustable parameter. For small values of the radius of the dot large corrections are obtained for the shallow donors studied.

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30

Boichuk, V. I., R. I. Pazyuk, and I. V. Bilynskyi. "The Electrical Conductivity in Superlattices of Spherical Quantum Dots." Фізика і хімія твердого тіла 17, no. 3 (September 15, 2016): 320–28. http://dx.doi.org/10.15330/pcss.17.3.320-328.

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The electrical properties of semiconductor systems of spherical GaAs / AlxGa1-xAs quantum dots of various dimensions, depending on the energy of the Fermi level and temperature, and the concentration of aluminum in the matrix, are investigated. Dependences of group velocity of electrons on the index of minisons were obtained. Reducing the CT radius, as well as increasing the aluminum concentration in the matrix, results in an increase in group velocity. The change in the sign of the group velocity of individual minisons is caused by the behavior of the isoenergetic surfaces of these minisons. The electrical conductivity is calculated, containing the contributions of the s- and three p-minisons for given parameters of the system, the maximum of which is near the center of the minisone. The increase in electrical conductivity is observed with a decrease in the CT radius and the aluminum concentration, as well as with the decrease of the GaAs / AlxGa1-xAs superlattice dimension. The temperature dependence of electrical conductivity for various parameters of such systems is also investigated.

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31

Betancur, F. J., J. Sierra-Ortega, R. A. Escorcia, J. D. González, and I. D. Mikhailov. "Density of impurity states in doped spherical quantum dots." Physica E: Low-dimensional Systems and Nanostructures 23, no. 1-2 (June 2004): 102–7. http://dx.doi.org/10.1016/j.physe.2004.01.006.

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32

Lu, Shulong, Rui Jia, Desheng Jiang, and Shushen Li. "Lasing of CdSSe quantum dots in glass spherical microcavity." Physica E: Low-dimensional Systems and Nanostructures 17 (April 2003): 453–55. http://dx.doi.org/10.1016/s1386-9477(02)00834-2.

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33

Kushwaha, M. S. "Size effects on magneto‐optics in spherical quantum dots." Electronics Letters 50, no. 18 (August 2014): 1305–7. http://dx.doi.org/10.1049/el.2014.2060.

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34

Planelles, J., F. Rajadell, and M. Royo. "Dielectric control of spin in semiconductor spherical quantum dots." Journal of Applied Physics 104, no. 1 (July 2008): 014313. http://dx.doi.org/10.1063/1.2952070.

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35

Zhu, Jia-Lin, and Xi Chen. "Donors confined by spherical quantum dots and located anywhere." Journal of Physics: Condensed Matter 6, no. 9 (February 28, 1994): L123—L126. http://dx.doi.org/10.1088/0953-8984/6/9/003.

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36

Möller, B., M. V. Artemyev, U. Woggon, and R. Wannemacher. "Mode identification in spherical microcavities doped with quantum dots." Applied Physics Letters 80, no. 18 (May 6, 2002): 3253–55. http://dx.doi.org/10.1063/1.1475364.

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37

de la Cruz, R. M., S. W. Teitsworth, and M. A. Stroscio. "Interface phonons in spherical GaAs/AlxGa1−xAs quantum dots." Physical Review B 52, no. 3 (July 15, 1995): 1489–92. http://dx.doi.org/10.1103/physrevb.52.1489.

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38

Wen-fang, Xie, and Chen Chuan-yu. "Three-electron systems in spherical parabolic GaAs quantum dots." Acta Physica Sinica (Overseas Edition) 7, no. 6 (June 1998): 464–68. http://dx.doi.org/10.1088/1004-423x/7/6/009.

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39

Yakar, Yusuf, Bekir Çakir, and Ayhan Özmen. "Linear and Nonlinear Optical Properties in Spherical Quantum Dots." Communications in Theoretical Physics 53, no. 6 (June 2010): 1185–89. http://dx.doi.org/10.1088/0253-6102/53/6/39.

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40

XING, Y., X. X. LIANG, and Z. P. WANG. "OPTICAL VIBRATION MODES IN SPHERICAL CORE-SHELL QUANTUM DOTS." Modern Physics Letters B 27, no. 18 (July 11, 2013): 1350134. http://dx.doi.org/10.1142/s0217984913501340.

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Анотація:

Using a dielectric continuum approach, the optical vibration modes in a spherical core-shell quantum dots (QDs) imbedded in a host nonpolar material are studied. The dispersion relation and the corresponding electron–phonon interaction Hamiltonian are derived. The numerical calculations for the CdSe/ZnS system are performed. The results reveal that there are three branches frequencies of interface/surface optical phonon in the system. A detailed discussion of the combined effects of the spatial confinement and dielectric mismatch between the dot and the host medium is given.

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41

Çakır, Bekir, Yusuf Yakar, and Ayhan Özmen. "Calculation of electric field gradient in spherical quantum dots." Philosophical Magazine 100, no. 2 (October 9, 2019): 248–66. http://dx.doi.org/10.1080/14786435.2019.1674456.

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42

Bekhouche, H., A. Gueddim, N. Bouarissa, and N. Messikine. "Phonon and Polaron properties in InSb spherical quantum dots." Chinese Journal of Physics 65 (June 2020): 146–52. http://dx.doi.org/10.1016/j.cjph.2020.02.017.

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43

Sprinzl, D., P. Nahálková, J. T. Devreese, V. N. Gladilin, P. Malý, and P. Němec. "Spin-polarised carriers in CdS quasi-spherical quantum dots." physica status solidi (c) 3, no. 4 (March 2006): 870–73. http://dx.doi.org/10.1002/pssc.200564633.

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44

Xie, Wenfang. "Investigation of D– centers confined by spherical quantum dots." physica status solidi (b) 245, no. 1 (January 2008): 101–5. http://dx.doi.org/10.1002/pssb.200743116.

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45

Wang Chuan-Dao. "Electronic structure in GaAs/AlxGa1-xAs spherical quantum dots." Acta Physica Sinica 57, no. 2 (2008): 1091. http://dx.doi.org/10.7498/aps.57.1091.

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46

Dipesh, Neupane. "Structural and optical investigation of CdSe quantum dots." Kathmandu University Journal of Science, Engineering and Technology 8, no. 2 (January 3, 2013): 83–88. http://dx.doi.org/10.3126/kuset.v8i2.7329.

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Анотація:

CdSe semiconducting Quantum dots were prepared by a chemical method at a room temperature. X-ray powder diffraction and transmission electron microscope measurements conformed a hexagonal cubic crystalline phase of Cdse semiconducting Quantum dots of about 15 nm average size with nearly spherical shape. The absorption and photoluminescence spectra of the CdSe quantum dots were strongly shown blue shifted due to size quantization. The present study describes a simultaneous and highly reproducible large scale synthesis of highly luminescent CdSe Quantum dots. Kathmandu University Journal of Science, Engineering and Technology Vol. 8, No. II, December, 2012, 83-88 DOI: http://dx.doi.org/10.3126/kuset.v8i2.7329

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47

Asgharinejad, A., and H. R. Askari. "The effect of spherical metallic nanoparticles on electromagnetically induced transparency in spherical quantum dots." Modern Physics Letters B 30, no. 25 (September 20, 2016): 1650215. http://dx.doi.org/10.1142/s0217984916502158.

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Анотація:

In this paper, electromagnetically induced transparency (EIT) is investigated in a GaAs spherical quantum dot (SQD) with central potential in presence of spherical metallic nanoparticle (SMNP). Solving the Schrödinger equation in effective mass, eigenfunctions and eigenvalues of SQD are obtained. By using the obtained eigenfunctions and eigenvalues, the susceptibility of SQD is found. In addition, dependence of EIT on radius of SQD and SMNP, distance between SMNP and SQD and Rabi and probe frequencies are investigated.

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48

DEVREESE, J. T., V. M. FOMIN, and S. N. KLIMIN. "PHONON-INDUCED FEATURES IN OPTICAL SPECTRA OF QUANTUM DOTS: BREAKDOWN OF THE ADIABATIC APPROXIMATION." International Journal of Modern Physics B 15, no. 28n30 (December 10, 2001): 3579–83. http://dx.doi.org/10.1142/s0217979201008196.

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Анотація:

A theory of photoluminescence and Raman scattering in semiconductor quantum dots is developed, which relies on two key ingredients. First, it takes into account non-adiabaticity of the exciton-phonon system. Second, it includes a multimode dielectric model of LO-phonons and of the electron-phonon interaction in confined systems. Our approach is applied to calculate the optical spectra of several quantum-dot structures: ensembles of spherical CdSe, CdSe x S 1-x and PbS quantum dots, self-assembled InAs/GaAs and CdSe/ZnSe quantum dots, brick-shaped InAs/GaAs quantum dots created by local anodic oxidation using the atomic force microscope.

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49

Mazzier, D., M. Favaro, S. Agnoli, S. Silvestrini, G. Granozzi, M. Maggini, and A. Moretto. "Synthesis of luminescent 3D microstructures formed by carbon quantum dots and their self-assembly properties." Chem. Commun. 50, no. 50 (2014): 6592–95. http://dx.doi.org/10.1039/c4cc02496f.

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Анотація:

Novel star shaped carbon quantum dots–(poly-γ-benzyl-l-glutamate) conjugates displayed a self-assembling propensity to generate spherical microstructures that retain the characteristic emission properties of the native dots.

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50

Kalasad, M. N., M. K. Rabinal, B. G. Mulimani, and N. C. Greenham. "Size Tunable near Infrared High-Quality PbS Quantum Dots." Applied Mechanics and Materials 490-491 (January 2014): 319–23. http://dx.doi.org/10.4028/www.scientific.net/amm.490-491.319.

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Анотація:

Herein, we report the synthesis of PbS Quantum Dots (QDs) with oleic acid as surfactant molecules by non coordinating solvent route. The particles are having better size tunability by varying temperature and time of reaction. These quantum dots are characterized by optical absorption, photoluminescence and transmission electron microscopy. The resulting colloids are highly stable, extremely small size, spherical in shape, monodisperse and strong band emission. The estimated particles sizes are in the range of 2 to 6 nm. The present method of synthesis of PbS quantum dots can be used to fabricate low cost electronic devices.

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