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Multifunctional room-temperature phosphorescent carbon dots for relative humidity determination and information encryption.

Abstract：

:The relative humidity (RH) determination is crucial in many fields. Based on the phosphorescent properties of room-temperature phosphorescent (RTP) carbon dots, the RTP carbon dots as a probe are expected to be used to rapidly detect relative humidity. In this study, matrix-free room-temperature phosphorescent N-doped carbon dots (N-CDs) were successfully prepared from urea, succinic acid, and acrylamide using a hydrothermal method. The as-synthesized N-CDs had good biocompatibility and water solubility. The N-CDs emitted blue fluorescence and green phosphorescence. Moreover, the N-CD powder exhibited stable phosphorescence with a phosphorescence lifetime of 158 ms (afterglow time to the naked eye for ~7 s). Because H2O molecules affected the afterglow time, the as-prepared N-CD test paper for the first time could be applied as a probe to monitor RH, the afterglow time of the N-CD test paper is linearly related to the RH (y = -0.0729x+7.042, R2 = 0.998) and the RH detection range is 0%-85%. And the results were consistent with those obtained using a hygrometer. In addition, the N-CD solution could also be used as an encryption ink in the advanced information security field.

journal_name

Talanta

journal_title

Talanta

authors

Nie Y,Lai W,Zheng N,Weng W

doi

10.1016/j.talanta.2021.122541

keywords:

["Carbon dots","Information encryption","Relative humidity determination","Room temperature phosphorescence","Security ink"]

subject

Has Abstract

pub_date

2021-10-01 00:00:00

pages

122541

eissn

0039-9140

issn

1873-3573

pii

S0039-9140(21)00462-8

journal_volume

233

pub_type

杂志文章

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