Unconventionally anisotropic growth of PbSe nanorods:Controllable fabrication under solution-solid-solid regime over Ag2Se catalysis for broadband photodetection

Broadband optoelectronic devices intrigue enormous interests on account of their promising potential in optical communications,sensors and environmental monitoring.PbSe nanocrystals are promising candidates for the construction of next-generation photodetectors due to their fascinating intrinsic properties and solution-processed compatibility with varied substrates.Here,we report the fabrication of a broadband photodetector on the basis of high-quality solution-processed PbSe nanorods in rock-salt phase grown along unconventionally anisotropic growth direction of<112>zone axis.The rock-salt PbSe nanorods are synthesized in solution phase over the catalysis of Ag2Se with relatively high-temperature body-centered cubic phase via a solution-solid-solid growth regime using oleylamine and oleic acid as solvents and stabilizer surfactants,from which the PbSe nanorods with the unconventionally anisotropic growth direction are controllably grown in size and shape in the synthetic procedure typically with about 17 nm in diameter and 58 nm in length on average.Meanwhile,the PbSe nanorods-based photodetector exhibits a broadband response from 405 to 1,064 nm with a high responsivity of 0.78 A·W^(-1)and a fast response time of 17.5μs.The response time is much faster in comparison with most of the PbSe-based photodetectors with response time in millisecond level.

A Unity of Contradictions-An Analysis of Jane Eyre's Character

Charlotte Bronte's masterpiece Jane Eyre creates a bright figure in the world's literature, attracting readers of generations all through the globe with her character of both unconvention and convention, which is a unity of contradictions. In this paper, the author presents the analysis in two parts: Jane Eyre's childhood in Gateshead, and Jane Eyre's schooldays in Lowood, drawing a conclusion finally that the two aspects of Jane Eyre's nature-unconvention and convention are indispensable for portraying the heroine.

Jane Eyre's Character Displayed in Her Experience of Marriage and Love

Charlotte Bronte is a famous English woman novelist in the 19th century.Her masterpiece Jane Eyre creates a bright figure in the world's literature,attracting readers of generations all through the globe with her character of both unconvention and convention,which is a unity of contradictions.In this paper,the author presents the analysis in two parts:Jane Eyre's convention presented in her experience of marriage and love,and Jane Eyre's unconvention presented in her experience of marriage and love,drawing a conclusion finally that the two aspects of Jane Eyre's nature-unconvention and convention are indispensable for portraying the heroine.

Unconventional phonon spectra and obstructed edge phonon modes

Based on the elementary band representations(EBR),many topologically trivial materials are classified as unconventional ones(obstructed atomic limit),where the EBR decomposition for a set of electronic states is not consistent with atomic valenceelectron band representations.In the work,we identify that the unconventional nature can also exist in phonon spectra,where the EBR decomposition for a set of well-separated phonon modes is not consistent with atomic vibration band representations(ABR).The unconventionality has two types:typeⅠis on an empty site;and typeⅡis on an atom site with non-atomic vibration orbitals.The unconventionality is described by the nonzero real-space invariant at the site.Our detailed calculations show that the black phosphorus(BP)has the typeⅠunconventional phonon spectrum,while 1H-Mo Se_(2)has the typeⅡone,although their electronic structures are also unconventional.Accordingly,the obstructed phonon modes are obtained for two types of unconventional phonon spectra.