Journal
CHEMICAL SCIENCE
Volume 7, Issue 3, Pages 2195-2200Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5sc04450b
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Funding
- UGC
- CSIR (New Delhi, India)
- CSIR [CSC0122, CSC0102]
- DST [SR/S1/IC-22/2009]
- DST Indo-Singapore Project [INT/SIN/P-05]
- DST Nano-mission Project [SR/NM/NS-1179/2012G]
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Inkless and erasable printing is the key solution towards a more sustainable paper industry, in terms of reducing paper wastages and the associated environmental hazards from waste paper processing. However, only a few cases have been reported in the literature where inkless printing has been tested in some practical systems. In an attempt to address this solution, we used photochromic metal-organic frameworks (MOFs) and tested their capability as inkless and erasable printing media. The printing was performed using sunlight as the light source on MOF-coated papers. The resulting printing had good resolution and stability, and was capable of being read both by the human eye and smart electronic devices; furthermore, the paper could be reused for several cycles without any significant loss in intensity. Interestingly, different coloured printing with a similar efficiency was achieved by varying the structure of the MOF.
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