Biomedical Engineering Reference
In-Depth Information
nonlinearity and high photorefractivity. The polymers can generate fluorescent images,
assemble into supramolecular patterns, and form well-aligned nanotubes. The polyynes
can be post-functionalized through metal complexation, whose refractive indexes can be
manipulated to a great extent by photoirradiation. The hyperbranched polymer com-
plexes can serve as precursors to soft ferromagnetic ceramics and as catalysts for carbon
nanotube fabrications.
Keywords
Functional materials
·
Hyperbranched polymers
·
Polyaddition
·
Polycoupling
·
Polycyclotrimerization
Abbreviations
AAO
anodic aluminum oxide
AFM
atomic force microscopy
Ar
aromatic ring
β
molecular first hyperpolarizability
Bu
butyl group
c
concentration
C
core molecule
CNT
carbon nanotube
Cp
∗
pentamethylcyclopentadienyl ligand
CVD
chemical vapor deposition
D
dendritic unit
D
0.5
dose needed for an
F
g
value of 0.5 (or 50%)
d
33
macroscopic SHG coefficient
DB
degree of branching
DCM
dichloromethane
D
e
exposure dose
DMF
N
,
N
-dimethylformamide
DSC
differential scanning calorimetry
EO
electro-optical
F
g
gel fraction
F
OL
optical limiting threshold fluence
FTIR
Fourier-transfer infrared spectroscopy
F
t
,
m
/
F
i
,
m
optical signal suppression ratio
GPC
gel permeation chromatography
H
strength of magnetic field
hb
-PA
hyperbranched polyarylene
hb
-PAA
hyperbranched poly(aroylarylene)
hb
-PAE
hyperbranched poly(aryleneethynylene)
hb
-PAP
hyperbranched poly(alkylenephenylene)
hb
-PP
hyperbranched polyphenylene
hb
-PPE
hyperbranched poly(phenyleneethynylene)
hb
-PTA
hyperbranched polytriazole
hb
-PY
hyperbranched polyyne
H
c
coercivity
L
ligand
L
linear unit
l
f
film thickness
λ
ab
absorption maximum
