7,494 research outputs found
Electronic transport in quasi-one-dimensional arrays of gold nanocrystals
We report on the fabrication and current-voltage (IV) characteristics of very
narrow, strip-like arrays of metal nanoparticles. The arrays were formed from
gold nanocrystals self-assembled between in-plane electrodes. Local
cross-linking of the ligands by exposure to a focused electron beam and
subsequent removal of the unexposed regions produced arrays as narrow as four
particles wide and sixty particles long, with high degree of structural
ordering. Remarkably, even for such quasi-one-dimensional strips, we find
nonlinear, power-law IV characteristics similar to that of much wider
two-dimensional (2D) arrays. However, in contrast to the robust behavior of 2D
arrays, the shape of the IV characteristics is much more sensitive to
temperature changes and temperature cycling. Furthermore, at low temperatures
we observe pronounced two-level current fluctuations, indicative of discrete
rearrangements in the current paths. We associate this behavior with the
inherent high sensitivity of single electron tunneling to the polarization
caused by the quenched offset charges in the underlying substrate.Comment: 5 pages, 4 figure
Studentsa Ratings of School Climate and School Belonging for Understanding Their Effects and Relationship of Junior High Schools in Taiwan
This study was to explore junior high students perception of school climate and school belonging The main purposes of the present study were to test the relationships between school climate and school belonging How s the correlation between the two variables Which one has better effects on the other Three hundred and twenty-eight junior high students in Taiwan were selected to inclusion in the investigation A statistically significant relationship between school climate and school belonging was found From the construction analyses we found that the path coefficients of Model 1 and Model 2 are the same The outcomes meant that school climate had significant effects on school belonging and school belonging also had significant effects on school climate The results of the study can offer the relative schools for evaluating school effects and school improvemen
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