TY  - JOUR
AU  - Hu, Bojian
AU  - Sun, Shengtong
AU  - Wu, Baohu
AU  - Wu, Peiyi
TI  - Colloidally Stable Monolayer Nanosheets with Colorimetric Responses
JO  - Small
VL  - 15
IS  - 5
SN  - 1613-6829
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2019-01944
SP  - 1804975 -
PY  - 2019
AB  - Despite the discovery of chromogenic‐layered materials for decades of years, fabrication of colloidally stable monolayer organic 2D nanosheets in aqueous media with colorimetric responses is still challenging. Herein reported is the first solution synthesis of chromic monolayer nanosheets via the topochemical polymerization of self‐assembled amphiphilic diacetylenes in aqueous media. The polydiacetylene (PDA) nanosheets are ≈3–4 nm thick in solution and only ≈1.9 nm thick in the dried state, while the lateral size can reach several micrometers. Moreover, the aqueous stability endows PDA nanosheets with excellent processability, which can further assemble into films via vacuum filtration or act as an ink for high‐resolution inkjet printing. The filtrated films and printed patterns exhibit fully reversible blue‐to‐red thermochromism, and the film also displays an interesting reversible colorimetric transition in response to near‐infrared light, which is not reported for other PDA‐only systems. The present colloidal PDA nanosheets should represent a new kind of chromic organic 2D nanomaterials that may be applied as novel building blocks for developing intelligent hybrid materials and may also find diverse sensing, display and/or anticounterfeiting applications.
LB  - PUB:(DE-HGF)16
C6  - pmid:30589208
UR  - <Go to ISI:>//WOS:000458673800018
DO  - DOI:10.1002/smll.201804975
UR  - https://juser.fz-juelich.de/record/861479
ER  -