Soft X-ray Detectors Based on SnS Nanosheets for the Water Window Region

Babar Shabbir, Jingying Liu, Vaishnavi Krishnamurthi, R. A.W. Ayyubi, Kevin Tran, Sherif Abdulkader Tawfik, M. Mosarof Hossain, Hareem Khan, Yingjie Wu, Bannur Nanjunda Shivananju, Rizwan Ur Rehman Sagar, Asif Mahmood, Adnan Younis, Md Hemayet Uddin, Syed A. Bukhari, Sumeet Walia, Yongxiang Li, Michelle J.S. Spencer, Nasir Mahmood, Jacek J. Jasieniak

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The structural characteristics of biological specimens, such as wet proteins and fixed living cells, can be conveniently probed in their host aqueous media using soft X-rays in the water window region (200–600 eV). Conventional X-ray detectors in this area exhibit low spatial resolution, have limited sensitivity, and require complex fabrication procedures. Here, many of these limitations are overcome by introducing a direct soft X-ray detector based on ultrathin tin mono-sulfide (SnS) nanosheets. The distinguishing characteristic of SnS is its high photon absorption efficiency in the soft X-ray region. This factor enables the fabricated soft X-ray detectors to exhibit excellent sensitivity values on the order of (Formula presented.) at peak energies of ≈600 eV. The peak signal is found to be sensitive to the number of stacked SnS layers, with thicker SnS nanosheet assemblies yielding a peak response at higher energies and with peak sensitives of over 2.5 (Formula presented.) at 1 V. Detailed current–voltage and temporal characteristics of these detectors are also presented. These results showcase the excellent performance of SnS nanosheet-based soft X-ray detectors compared to existing direct soft X-ray detectors, including that of the emerging organic–inorganic perovskite class of materials.

Original languageEnglish
Article number2105038
JournalAdvanced Functional Materials
Volume32
Issue number3
DOIs
Publication statusPublished - Jan 14 2022
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Chemistry
  • Biomaterials
  • General Materials Science
  • Condensed Matter Physics
  • Electrochemistry

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