Department of Biological Sciences and Bioengineering, Inha University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Korea.
Department of Plasma Engineering, Korea Institute of Machinery & Materials, Daejeon 34103, Korea.
Sensors (Basel). 2022 Oct 12;22(20):7737. doi: 10.3390/s22207737.
In this work, we fabricate cesium lead bromide nanofibers (CsPbBr NFs) via the attachment of cesium lead bromide nanocrystals (CsPbBr NCs) on the surface of electrospun cellulose nanofibers (CNFs) and employ them in a sensor to effectively detect gaseous nitrogen. The CsPbBr NFs are produced initially by producing CsPbBr NCs through hot injection and dispersing on hexane, followed by dipping CNFs and ultrasonicate for 1 h. Morphological characterization through visual, SEM and TEM image, and crystalline structure analysis by XRD and FT-IR analysis of CsPbBr NFs and NCs show similar spectra except for PL due to unavoidable damage during the ultrasonication. Gaseous nitrogen is subsequently detected using the photoluminescence (PL) property of CsPbBr NFs, in which the PL intensity dramatically decreases under various flow rate. Therefore, we believe that the proposed CsPbBr NFs show significant promise for use in detection sensors in various industrial field and decrease the potential of fatal damage to workers due to suffocation.
在这项工作中，我们通过将铯铅溴纳米晶体（CsPbBr NCs）附着在静电纺丝纤维素纳米纤维（CNFs）的表面来制造铯铅溴纳米纤维（CsPbBr NFs），并将其用于传感器中以有效检测气态氮。首先通过热注入法制备 CsPbBr NCs 并分散在正己烷中，然后将 CNFs 浸泡并超声处理 1 小时，从而制备 CsPbBr NFs。通过视觉、SEM 和 TEM 图像对 CsPbBr NFs 和 NCs 的形态特征进行了表征，并通过 XRD 和 FT-IR 分析对其晶体结构进行了分析，除了由于超声过程中不可避免的损坏而导致的 PL 之外，它们的光谱相似。随后使用 CsPbBr NFs 的光致发光（PL）特性来检测气态氮，其中在各种流速下 PL 强度急剧下降。因此，我们相信所提出的 CsPbBr NFs 在各种工业领域的检测传感器中有很大的应用前景，并降低了由于窒息而对工人造成致命伤害的可能性。
