Self-assembled microspherical aggregates that work as whispering gallery mode (WGM) optical resonators are synthesized from a novel hygroscopic polymer covalently appended with an aggregation-induced emission luminogen. The resultant microspheres can absorb moisture from the surrounding atmosphere. Accordingly, the WGM resonant peaks shift due to the change in the diameter of the microsphere. The sensitivity of the peak-shift is as high as 255 picometre per percent relative humidity, which is the highest among non-tapered type optical humidity sensors. The responsivity toward moisture is kept virtually intact at least through five cycles of hydration and dehydration processes.

中文翻译：

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基于附有聚集诱导发射光致发光的吸湿聚合物微谐振器的高灵敏度湿度传感器

自组装的微球聚合体用作耳语画廊模式（WGM）光学谐振器，是由一种新型吸湿性聚合物合成的，该聚合物共价添加了聚集体诱导的发射发光剂。所得的微球可以吸收周围大气中的水分。因此，由于微球直径的变化，WGM共振峰移动。峰值偏移的灵敏度相对于相对湿度的百分数为255皮米，这是非锥形光学湿度传感器中最高的。至少通过五个水合和脱水过程循环，对水分的响应性几乎保持不变。