Introduction to Nanotechnology

308 ORGANIC COMPOUNDS AND POLYMERS
pP y 2 I
0
f+G w
(C) Mn2’ Mn2+
0
Field328.9 f 5mT2+
Figure 11.25. Electron paramagnetic resonance spectra (lower right) of a PEG-PLA surface
containing acetal or aldehyde groups alter interaction with the spin label TEMPO, which
produces an EPR triplet spectrum. Spectra are illustrated for (a) an aldehyde surface interacting
with 4-amino TEMPO, (b) an acetal surface interacting with 4-amino TEMPO, and (c) an
aldehyde surface interacting with TEMPO, which lacks an amino group -NH2. The strong outer
calibration lines with a 9OmT spacing on Ihe EPR spectraare due to the presence of Mn2* ions.
[From Otsuka et al. (2001).]
FURTHER READING
A. Archut and F. Vogtle, “Dendritic Molecules-Historic Development and Future Applica-
tions.” in Nalwa (2000). Vol. 5, Chapter 5, p. 333.
H. Kasai. H. S. Nalwa, S. Okada, H. Oikawa. and H. Nakanishi, “Fahricdtion and Spectro-
graphic Characterization of Organic Nanocrystals,” in Nalwa (2000). Vol. 5, Chapter 8. p.
334.
G. Liu. “Polymeric Nanoslructurea,” in Nalwa (2000), Vol. 5, Chapter 9, p. 475.
H. S. Nalwa, ed., Handbook a/ Nanostnctured Materials and NanorcchnoloKy Vol. 5,
Oapnics, Polymers and Biolugicol Compormds. Academic Prcss. Boston, 2000.
H. Otsuka, Y. Nagasaki, and K. Kataoka. ibhterials Today (3), 30, (2001).