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Visualization of Dendrimer Molecules by Transmission Electron Microscopy (TEM): Staining Methods and Cryo-TEM of Vitrified Solutions
Abstract
Individual dendrimer molecules of poly(amidoamine) (PAMAM) from generation 10 (G10) to G5 were imaged by conventional transmission electron microscopy (TEM) after staining with aqueous sodium phosphotungstate. The dendrimers were resolved as separate, beam-stable entities, and their sizes and distribution of sizes were statistically analyzed and compared with data from small-angle X-ray scattering in solution. Aqueous G10 dendrimers were also characterized by examination in the frozen, hydrated state after quench-freezing in liquid ethane (cryo-TEM) and the data compared with the results of the staining experiments. To a first approximation, the dendrimers appeared circular in projection and the diameters conformed to a Gaussian distribution which broadened somewhat with increasing generation number. Cryo-TEM, in general, confirmed the staining experiments but suggested that, in the native state, there is more variability in the shapes of the dendrimers, with polyhedral shapes occurring quite frequently.
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Cited by
About Dendrimers: Structure, Physical Properties, and Applications
Bosman, A. W., Janssen, H. M., & Meijer, E. W. (1999) · Chemical Reviews · doi:10.1021/cr970069y · Cited by 2,343
Tomalia, D. A. (2005) · Progress in Polymer Science · doi:10.1016/j.progpolymsci.2005.01.007 · Cited by 1,115
Self-citationSmart nanocarrier-based drug delivery systems for cancer therapy and toxicity studies: A review
Hossen, S., Hossain, M. K., Basher, M. K., Mia, M. N. H., Rahman, M. T., & Uddin, M. J. (2019) · Journal of Advanced Research · doi:10.1016/j.jare.2018.06.005 · Cited by 998
Discovery of dendrimers and dendritic polymers: A brief historical perspective*
Tomalia, D. A., & Fréchet, J. M. J. (2002) · Journal of Polymer Science Part A: Polymer Chemistry · doi:10.1002/pola.10301 · Cited by 908
Self-citationDendrimers: Emerging polymers for drug-delivery systems
Nanjwade, B. K., Bechra, H. M., Derkar, G. K., Manvi, F. V., & Nanjwade, V. K. (2009) · European Journal of Pharmaceutical Sciences · doi:10.1016/j.ejps.2009.07.008 · Cited by 542
Metadata
- Authors
- Jackson, C. L., Chanzy, H. D., Booy, F. P., Drake, B. J., Tomalia, D. A., Bauer, B. J., & Amis, E. J.
- Venue
- Macromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 1998-08-19
- Volume
- 31
- Issue
- 18
- Pages
- 6259-6265
- ISSN
- 0024-9297 (ISSN-L)
- 1520-5835
- OpenAlex
- W2091638812
- Cited by
- 232
- References
- 0
- FWCI
- 9.70
- Type
- journal article
- Language
- en
- Open access
- closed
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- Jackson, C. L., Chanzy, H. D., Booy, F. P., Drake, B. J., Tomalia, D. A., Bauer, B. J., & Amis, E. J. (1998). Visualization of Dendrimer Molecules by Transmission Electron Microscopy (TEM): Staining Methods and Cryo-TEM of Vitrified Solutions. Macromolecules. https://doi.org/10.1021/ma9806155
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