Comment On '1D Tellurium Nanostructures: Photothermally Assisted Morphology-Controlled Synthesis and Applications in Preparing Functional Nanoscale Materials'

摘要

In a recent publication, Zhang et al. reported photoluminescence (PL) spectra for Te nanowires and Pt-Te nanochains and found them to emit over a broad range, 400-500 nm, peaking at～430 nm (Figure 7b ofRef.[1]). From our previous experience we knowthat it is possible to observe similar emission from commercial spectrophotometers when excited at ～365 nm even in the absence of any sample. In support of our statement, we present here the spectrum recorded on a Hitachi (F-4010) spectrophotometer without any sample but in the presence of the standard solid-sample holder (Fig. 1). It strikingly resembles that reported by Zhang et al. for Te nanowires and Pt-Te nanochains, both in terms of spectral shape and peak position. To ensure that there Was no error in the detector system or in its alignment, we recorded another spectrum without the sample holder (Fig. 1) that showed no emission at all. Initially we thought that the polymer cushion in standard commercial spectrometer solid-sample holders was responsible for such emission.Nevertheless, we conclude that it is not a true emission from any sample but an artifact of measurement.