Skip to main content Accessibility help
×
Home
Hostname: page-component-559fc8cf4f-67gxp Total loading time: 0.254 Render date: 2021-02-24T23:55:06.946Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "metricsAbstractViews": false, "figures": false, "newCiteModal": false, "newCitedByModal": true }

Synthesis, Structural Characterization, and Optical Spectroscopy of Close Packed CdSE Nanocrystallites

Published online by Cambridge University Press:  28 February 2011

C. R. Kagan
Affiliation:
Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139
C. B. Murray
Affiliation:
Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139
M. G. Bawendi
Affiliation:
Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139
Get access

Abstract

We describe a method to synthesize optical quality thin and thick films of close packed CdSe nanocrystallites (quantum dots). The average dot size is tunable from ∼12-150 Å in diameter with ∼3.5% rms size distribution. The identity of each particle and the high monodispersity of the sample are maintained in the films as revealed by small-angle x-ray scattering, transmission electron microscopy, and optical spectroscopy. We use small-angle x-ray diffraction patterns to obtain form factors for the individual dots and to generate radial distribution functions for the densely packed films. We observe the random close packing of dots in the solid state using transmission electron microscopy. Comparing optical spectra of particles close packed in a film with those of nanocrystallites dispersed in alkanes reveals similar optical resonances in absorption while the emission lineshape is modified and its position is red shifted. Differences in film emission are consistent with electronic energy transfer between close packed dots within the inhomogeneous distribution of the sample.

Type
Research Article
Copyright
Copyright © Materials Research Society 1995

Access options

Get access to the full version of this content by using one of the access options below.

References

1 Efros, AL L. and Efros, A. L., Sov. Phys. Semicond. 16,772 (1982); L. E. Brus, J. Chem. Phys. 80, 4403 (1984).Google Scholar
2 Murray, C. B., Norris, D. J., and Bawendi, M. G., J. Am. Chem Soc. 115,8706 (1993).CrossRefGoogle Scholar
3 Vossmeyer, T. et al. , J. Phys. Chem. 98 7665 (1994).CrossRefGoogle Scholar
4 Norris, D. J., Sacra, A., Murray, C. B., and Bawendi, M. G., Phys. Rev. Lett. 72,2612 (1994).CrossRefGoogle Scholar
5 Brus, L. E., AppL Phys. A 53,465 (1991).CrossRefGoogle Scholar
6 Takaghara, T., Optoelect. Dev. Tech. 8,545 (1993).Google Scholar
7 Heitmann, D. and Kotthaus, J. P., Physics Today 46,56 (1993).CrossRefGoogle Scholar
8 Guinier, A., X-ray Diffraction. (Dover Publications, Inc., New York, 1994), p. 319.Google Scholar
9 Klug, H. P. and Alexander, L. E., X-rav Diffraction Procedures (Wiley, New York, 1954), p. 586.Google Scholar
10 Kingery, W. D. et al. , Introduction to Ceramics. 2nd Ed (Wiley, New York, 1960), p. 769.Google Scholar
11 Förster, Th., in Comparative Effects of Radiation, edited by Burton, M., Kirby-Smith, J. S., and Magee, J. L., (Wiley, New York, 1960), p. 301.Google Scholar
12 Spanhel, L. and Anderson, M. A., J. Am. Chem Soc. 112,2278 (1990).CrossRefGoogle Scholar

Full text views

Full text views reflects PDF downloads, PDFs sent to Google Drive, Dropbox and Kindle and HTML full text views.

Total number of HTML views: 0
Total number of PDF views: 11 *
View data table for this chart

* Views captured on Cambridge Core between September 2016 - 24th February 2021. This data will be updated every 24 hours.

Send article to Kindle

To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Synthesis, Structural Characterization, and Optical Spectroscopy of Close Packed CdSE Nanocrystallites
Available formats
×

Send article to Dropbox

To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

Synthesis, Structural Characterization, and Optical Spectroscopy of Close Packed CdSE Nanocrystallites
Available formats
×

Send article to Google Drive

To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

Synthesis, Structural Characterization, and Optical Spectroscopy of Close Packed CdSE Nanocrystallites
Available formats
×
×

Reply to: Submit a response


Your details


Conflicting interests

Do you have any conflicting interests? *