Das, Sumita and Pramanik, Srikrishna and Chatterjee, Sabyasachi and Das, Partha Pratim and Sujatha Devi, P and Kumar, Gopinatha Suresh (2017) Selective Binding of Genomic Escherichia coli DNA with ZnO Leads to White Light Emission: A New Aspect of Nano-Bio Interaction and Interface. ACS Applied Materials & Interfaces, 9 (1). pp. 644-657. ISSN 1944-8244

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Here, we report for the first time, a novel and intriguing application of deoxyribonucleic acid (DNA) in the area of optics by demonstrating white light emission by tuning the emission of a nanomaterial, ZnO rods, exhibiting surface defects, in the presence of genomic Escherichia coli DNA with a comparatively high quantum efficiency. In order to understand the DNA specificity, we have also studied the interaction of ZnO with CT, and ML DNA, ss EC DNA, synthetic polynucleotides and different mononucleosides and bases. Further, in order to understand the effect of particle shape and defects present in ZnO, we have also extended our study with ZnO rods prepared at higher temperature exhibiting red emission and ZnO particles exhibiting yellow emission. Interestingly, none of the above studies resulted in white light emission from ZnO-DNA complex. Our studies unequivocally confirmed that the concentration and the nature of DNA and ZnQ together plays a crucial role in obtaining CIE coordinates (0.33, 0.33) close to white light. The much enhanced melting temperature (T-m) of EC DNA and the energetics factors confirm enhanced hydrogen bonding of ZnO with EC DNA leading to a new emission band. Our experimental observations not only confirm the selective binding of ZnO to EC DNA but also open a new perspective for developing energy saving light emitting materials through nano-bio interactions.

Item Type: Article
Subjects: Engineering Materials
Divisions: Sensor and Actuator
Depositing User: Bidhan Chaudhuri
Date Deposited: 23 Jan 2018 11:39
Last Modified: 23 Jan 2018 11:39
URI: http://cgcri.csircentral.net/id/eprint/4018

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