Heterostructured DNA templates: A combined magnetic force microscopy and circular dichroism study

Jaganathan, Hamsa; Ivanisevic, Albena
December 2008
Applied Physics Letters;12/29/2008, Vol. 93 Issue 26, p263104
Academic Journal
The effect of nanoparticle (NP) concentration was examined on the formation of heterostructured nanowires fabricated using DNA as a template. At mass ratios of 1:1 DNA:NP, the circular dichroism (CD) data showed a distinct characteristic, a plateau at 260 nm. The magnetic force microscopy (MFM) data revealed segments that showed variable interaction with the magnetized tip. At high NP concentrations both the CD and MFM data confirmed that the DNA template denatures and the control over the assembly process is poor.


Related Articles

  • Interaction of Topotecan, DNA Topoisomerase I Inhibitor, with Double-Stranded Polydeoxyribonucleotides. 2. Formation of Topotecan—DNA Complex Containing Several DNA Molecules. Strel'tsov, S. A.; Mikheikin, A. L.; Nechipurenko, Yu. D. // Molecular Biology;May2001, Vol. 35 Issue 3, p374 

    This study is a continuation of a series of papers dealing with topotecan interaction with double-stranded polydeoxyribonucleotides. We showed earlier that topotecan molecules form dimers in solution at concentration above 10–5(per base pair). Topotecan interaction with calf thymus DNA in...

  • Magnetic linear dichroism effects in reflection spectroscopy: A case study at the Fe M[sub 2,3] edge. Ho¨chst, Hartmut; Rioux, Dennis; Zhao, Dai; Huber, David L. // Journal of Applied Physics;6/1/1997, Vol. 81 Issue 11, p7584 

    Magneto-optical measurements are strongly dependent on the polarization of the radiation as well as the interaction geometry of the light with respect to the relative orientation and direction of the magnetization M. We performed magnetic circular dichroism (MCD) and magnetic linear dichroism...

  • Surface potential imaging of nanoscale LiNbO3 domains investigated by electrostatic force microscopy. Liu, Xiaoyan; Kitamura, Kenji; Terabe, Kazuya // Applied Physics Letters;9/25/2006, Vol. 89 Issue 13, p132905 

    The surface potential imaging of nanoscale domains engineered on near-stoichiometric LiNbO3 (SLN) crystals was investigated using Kelvin probe-based, electrostatic force microscopy. The surface potential image reflected in the domain structure was clearly obtained using heat treatment in vacuum...

  • Visualizing Vortex Dynamics in Py/Nb Thin Film Hybrids by Low Temperature Magnetic Force Microscopy. Cucolo, A.; Scarfato, A.; Iavarone, M.; Longobardi, M.; Bobba, F.; Karapetrov, G.; Novosad, V.; Yefremenko, V. // Journal of Superconductivity & Novel Magnetism;Oct2012, Vol. 25 Issue 7, p2167 

    We have analyzed the vortex dynamics in Py(1 μm)/SiO(10 nm)/Nb(360 nm) thin film heterostructures as resulted from Magnetic Force Microscopy (MFM) frequency shift maps at low temperatures. The Nb film thickness has been chosen larger than the superconducting London penetration depth of about...

  • Polarization modal noise and dichroism in vertical-cavity semiconductor lasers. van Exter, M. P.; Willemsen, M. B.; Woerdman, J.P. // Applied Physics Letters;4/19/1999, Vol. 74 Issue 16, p2274 

    Shows how the limited polarization stability of vertical-cavity semiconductor lasers is related to the small dichroism and large quantum noise. Introduction of several techniques top measure dichroism and noise; Suitable polarization projections.

  • Magnetophoresis and electromagnetophoresis of microparticles in liquids. Watarai, Hitoshi; Suwa, Masayori; Iiguni, Yoshinori // Analytical & Bioanalytical Chemistry;Apr2004, Vol. 378 Issue 7, p1693 

    The magnetic field-induced migration of particles in liquids is a highly-promising technique for the micro-separation analysis of bioparticles, such as cells and large DNA. Here, new methods that make use of magnetophoresis and electromagnetophoresis to induce the migration of microparticles in...

  • Reversible control of magnetic domains in a Tb0.3Dy0.7Fe2/Pt/PbZr0.56Ti0.44O3 thin film heterostructure deposited on Pt/TiO2/SiO2/Si substrate. More-Chevalier, J.; Ferri, A.; Cibert, C.; Poullain, G.; Desfeux, R.; Bouregba, R. // Journal of Applied Physics;2014, Vol. 115 Issue 21, p214102-1 

    Tb0.3Dy0.7Fe2/Pt/PbZr0.56Ti0.44O3 (Terfenol-D/Pt/PZT) magnetoelectric (ME) thin films were deposited on Pt/TiO2/SiO2/Si substrate. Ferroelectric and magnetic properties were characterized at room temperature. At zero dc magnetic field and out of mechanical resonance, a variation of the voltage...

  • Thermalized ground state of artificial kagome spin ice building blocks. Arnalds, Unnar B.; Farhan, Alan; Chopdekar, Rajesh V.; Kapaklis, Vassilios; Balan, Ana; Papaioannou, Evangelos Th.; Ahlberg, Martina; Nolting, Frithjof; Heyderman, Laura J.; Hjörvarsson, Björgvin // Applied Physics Letters;9/10/2012, Vol. 101 Issue 11, p112404 

    We present a direct magnetic imaging study on the thermal macrospin ordering of artificial kagome spin ice building blocks. Using photoemission electron microscopy, employing x-ray magnetic circular dichroism, we are able to resolve the single domain magnetic nature of the macrospins and...

  • Recording of the Polarization of Light Specified by Anisotropic Crystals with the Aid of Photoinduced Dichroism in Photosensitive Films. Ageev, L. A.; Miloslavskiı, V. K.; Arashmid Nahal // Optics & Spectroscopy;Jul2000, Vol. 89 Issue 1, p87 

    It is shown that photoinduced dichroism in photosensitive AgCl films with Ag granules can be used to record the spectral dependence of the state of polarization specified by anisotropic crystals. The recording of the state of polarization throughout the visible spectral region is favored by the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics