Characterization of amorphous carbon film-coated nanotubes as electron field emission material

2005 ◽  
Vol 244 (1-4) ◽  
pp. 111-114 ◽  
Author(s):  
M. Nagatsu ◽  
T. Yoshida ◽  
S. Kurita ◽  
K. Murakami
Author(s):  
H. Todokoro ◽  
S. Nomura ◽  
T. Komoda

It is interesting to observe polymers at atomic size resolution. Some works have been reported for thorium pyromellitate by using a STEM (1), or a CTEM (2,3). The results showed that this polymer forms a chain in which thorium atoms are arranged. However, the distance between adjacent thorium atoms varies over a wide range (0.4-1.3nm) according to the different authors.The present authors have also observed thorium pyromellitate specimens by means of a field emission STEM, described in reference 4. The specimen was prepared by placing a drop of thorium pyromellitate in 10-3 CH3OH solution onto an amorphous carbon film about 2nm thick. The dark field image is shown in Fig. 1A. Thorium atoms are clearly observed as regular atom rows having a spacing of 0.85nm. This lattice gradually deteriorated by successive observations. The image changed to granular structures, as shown in Fig. 1B, which was taken after four scanning frames.


2005 ◽  
Vol 86 (23) ◽  
pp. 232102 ◽  
Author(s):  
C. H. P. Poa ◽  
S. R. P. Silva ◽  
R. G. Lacerda ◽  
G. A. J. Amaratunga ◽  
W. I. Milne ◽  
...  

1998 ◽  
Vol 37 (Part 2, No. 5A) ◽  
pp. L547-L549 ◽  
Author(s):  
Yunjun Li ◽  
Ning Yao ◽  
Gang Zhao ◽  
Jintian He ◽  
Binglin Zhang ◽  
...  

2004 ◽  
Vol 8 (2) ◽  
pp. 101-109 ◽  
Author(s):  
C. T. Harris ◽  
D. G. Walker ◽  
T. S. Fisher ◽  
W. H. Hofmeister

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