Integrated magnetic bionanocomposites through nanoparticle-mediated assembly of ferritin.
نویسندگان
چکیده
Magnetic (FePt) and nonmagnetic (Au) nanoparticles were used to assemble ferritin into near-monodisperse bionanocomposites featuring regular interparticle spacing. The FePt/ferritin assemblies are integrated magnetic materials with ferritin providing added magnetic volume fraction to the magnetic nanocomposite. These assemblies differ from either of their constituent particles in terms of blocking temperature (TB), net magnetic moment, coercivity, and remnance.
منابع مشابه
Two-dimensional nanoparticle arrays derived from ferritin monolayers.
A scalable technique for making silica coatings with embedded two-dimensional arrays of iron oxide nanoparticles is presented. The iron oxide nanoparticle arrays were formed by depositing quasi-crystalline ferritin layers, an iron storage protein with an iron oxide mineral core, on solid substrates by a spread-coating technique based on evaporation-induced convective assembly. The layer of prot...
متن کاملGrouping of ferritin and gold nanoparticles conjugated to pRNA of the phage phi29 DNA-packaging motor.
The bacteriophage phi29 DNA-packaging motor, which translocates and compresses the DNA genome of the phage into its procapsid during virion assembly, involves an essential ring formed by the packaging RNA (pRNA). We attached electron-dense nanoparticles to pRNA by hybridizing a DNA oligonucleotide with a biotin or thiol modification to a 3'-extension of core pRNA, and by coupling streptavidin a...
متن کاملIron-based ferritin nanocore as a contrast agent.
Self-assembling protein cages have been exploited as templates for nanoparticle synthesis. The ferritin molecule, a protein cage present in most living systems, stores excess soluble ferrous iron in the form of an insoluble ferric complex within its cavity. Magnetic nanocores formed by loading excess iron within an engineered ferritin from Archaeoglobus fulgidus (AfFtn-AA) were studied as a pot...
متن کاملMagnetic properties of ferritin and akaganeite nanoparticles in aqueous suspension
We have studied the magnetically induced optical birefringence Δn of horse spleen ferritin (HSF) and aqueous suspensions of several different-sized iron oxyhydroxide nanoparticles coated with different polysaccharides mimicking ferritin. The structure and dimensions of the akaganeite mineral core were characterized by XRD and TEM, respectively. The stability of the suspensions in the measuremen...
متن کاملMagnetic properties of self-assembled ferritin-core arrays
We studied the magnetic properties of a ferritin-core array, deposited on a Si wafer and encapsulated in silica. The array was formed by a simple evaporation-induced self-assembly mechanism of ferritin proteins, and it consists of 6 nm ferritin cores crystallized in a two-dimensional hexagonal lattice with a core-core distance of about 10.5 nm. Magnetization studies indicate that the array unde...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of the American Chemical Society
دوره 129 38 شماره
صفحات -
تاریخ انتشار 2007