Dugasani, Sreekantha Reddy Park, Byeongho Gnapareddy, Bramaramba Pamanji, Sreedhara Reddy Yoo, Sanghyun Lee, Keun Woo Lee, Seok Jun, Seong Chan Kim, Jae Hun Kim, Chulki Park, Sung Ha 2024-01-20T07:01:30Z 2024-01-20T07:01:30Z 2021-09-05 2015-06 2046-2069 https://pubs.kist.re.kr/handle/201004/125377 For more than two decades, structural DNA nanotechnology has been investigated, yet researchers still have not clearly determined the functional changes and the applicability of DNA structures resulting from the introduction of a variety of ions. Lanthanide ions, such as Dy3+, Eu3+ and Tb3+, are interesting rare earth ions that have unique characteristics applicable to photonics. Here, we have constructed lanthanide ion doped double-crossover DNA lattices, a new class of functional DNA lattices, grown on a silica substrate. Deformation-free lattices were fabricated on a given substrate, and dopant ions were introduced to study their photoluminescence characteristics. The photoluminescence of the lanthanide ion-doped DNA lattices exhibited broad emission spectra in the visible region and a tendency of near white light emission composed of various colours. The intensity of the distinct spectral lines produced by the photoluminescence increased as the doping concentration of the ions reached the critical point, and the intensity then decreased with a further increase in the ions. Photoluminescence quenching was also observed when the excitation wavelength increased. These phenomena are the result of energy transfer between the DNA and the dopant ions. Finally, we make use of chromaticity diagrams to identify the colour coordinates of the luminescence produced by the lanthanide ion-doped DNA lattices, and this information may be useful to construct efficient bio-photonic devices or sensors in the future. English ROYAL SOC CHEMISTRY THIN-FILM MOLECULES NANOSTRUCTURES INTERCALATION PRINCIPLES CRYSTALS COMPLEX Tunable near white light photoluminescence of lanthanide ion (Dy3+, Eu3+ and Tb3+) doped DNA lattices Article 10.1039/c5ra07360j 1 RSC ADVANCES, v.5, no.69, pp.55839 - 55846 RSC ADVANCES 5 69 55839 55846 scie scopus 000357803200028 2-s2.0-84936802215 Chemistry, Multidisciplinary Chemistry Article THIN-FILM MOLECULES NANOSTRUCTURES INTERCALATION PRINCIPLES CRYSTALS COMPLEX DNA lanthanide ion photoluminescence