Two types HgCdTe nanorod arrays with ordered symmetrical structure and wide band infrared absorption

Abstract Recent advances in the synthesis and characterization of one-dimensional infrared sensitive materials have engendered broad interest due to their possible outstanding performance for infrared spectrum detection. In this work, two kinds of nanorod arrays (NRAs), Hg 50 Cd 7.91 Te 42.02 and Hg 10.32 Cd 26.37 Te 63.31 , were successfully prepared on quartz and silicon substrate via tailoring the growth conditions for the first time. The growth mechanism of both NRAs followed the Stranski-Krastanov model. The unique XRD patterns of two NRAs could not be completely corresponded to any JCPDS card owing to their nonstandard components. TEM results showed that the single nanorod from both NRAs was consisted of the unique symmetrical crystalline grain. It was interesting to observe that the IR absorption of both NRAs could cover the near-IR and middle-IR simultaneously. Moreover, the Hg 10.32 Cd 26.37 Te 63.31 NRAs showed the novel periodicity absorption peaks due to their particular ordered symmetrical structure. Finally, we found the Hg 50 Cd 7.91 Te 42.02 NRAs exhibited novel heat effect and the Hg 10.32 Cd 26.37 Te 63.31 NRAs showed excellent photoresponse property under the IR light illumination with wavelength of 1.1 μm.