Biomedical Engineering Reference
In-Depth Information
1.2
1
Self-assembled
film
Diethylether atm
10 min
Diethylether atm
2 min
Dropout
0.8
0.6
0.4
0.2
0
325 380 435 490 545 600 655 710
Wavelength (nm)
(a)
1.3
1.28
A
3
1.26
1.24
B
1.22
C
1.2
2
D
1.18
1
1.16
0
250
500
750
1000
1250
1500
1750
2000
(b)
Time (s)
FIGURE 9.7
(a) The absorption spectra of the film, pure and treated with diethylether, for different periods of time and after
relaxation. (b) The absorbance profile at 570 nm of a self-assembled film of bacteriorhodopsin upon exposition to
vapors of diethyl ether by increasing pressure (A, B, C, D) and upon exposition to a compressed air stream for
the desorption of the anesthetic (regions 1, 2, 3).
9.6
Organic Nanostructured Matrices for Gas Sensing
A nanocomposite of multiwalled carbon nanotubes (MWNTs) embedded in poly(2,5-
dimethylaniline) (PDMA) was synthesized by oxidative polymerization. The conducting
polymer (PDMA) was chemically synthesized by oxidative polymerization of the
monomers by using (NH
4
)
2
S
2
O
8
under controlled conditions. For the synthesis, a quantity
of 100 mg of accurately weighed MWNTs was dispersed in 0.5 M HCl aqueous solution by
