Browsing by Author "Dana, A."
Now showing items 21-40 of 46
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Multivalent presentation of cationic peptides on supramolecular nanofibers for antimicrobial activity
(American Chemical Society, 2017)Noncovalent and electrostatic interactions facilitate the formation of complex networks through molecular self-assembly in biomolecules such as proteins and glycosaminoglycans. Self-assembling peptide amphiphiles (PA) are ... -
Nanomechanical characterization of osteogenic differentiation of mesenchymal stem cells on bioactive peptide nanofiber hydrogels
(Wiley-VCH Verlag, 2017-08)Stem cell differentiation is known to be influenced by the mechanical properties of the surrounding extracellular matrix (ECM); however, little is known about the mechanical phenotypes of differentiating stem cells within ... -
Nanoscale charging hysteresis measurement by multifrequency electrostatic force spectroscopy, insulating substrates, silicon nanocrystals
(American Institute of Physics, 2008-03-04)We report a scanning probe technique that can be used to measure charging of localized states on conducting or partially insulating substrates at room temperature under ambient conditions. Electrostatic interactions in the ... -
Newly designed silver coated-magnetic, monodisperse polymeric microbeads as SERS substrate for low-level detection of amoxicillin
(Elsevier, 2016-09)We report the preparation of silver-coated magnetic polymethacrylate core-shell nanoparticles for use in surface-enhanced Raman scattering based drug detection. Monodisperse porous poly (mono-2-(methacryloyloxy)ethyl ... -
One-step synthesis of size-tunable Ag nanoparticles incorporated in electrospun PVA/cyclodextrin nanofibers
(Pergamon Press, 2014)One-step synthesis of size-tunable silver nanoparticles (Ag-NP) incorporated into electrospun nanofibers was achieved. Initially, in situ reduction of silver salt (AgNO3) to Ag-NP was carried out in aqueous solution of ... -
Perfectly absorbing ultra thin interference coatings for hydrogen sensing
(OSA - The Optical Society, 2016)Here we numerically demonstrate a straightforward method for optical detection of hydrogen gas by means of absorption reduction and colorimetric indication. A perfectly absorbing metal-insulator-metal (MIM) thin film ... -
Photonic bandgap infrared spectrometer
(Optical Society of America, 2010)We propose and demonstrate an infrared (IR) absorption spectrometer, made with a spatially variable photonic bandgap (PBG) structure, a blackbody source, and a simple IR detector, to identify the IR molecular fingerprints ... -
Portable microfluidic integrated plasmonic platform for pathogen detection
(Nature Publishing Group, 2015)Timely detection of infectious agents is critical in early diagnosis and treatment of infectious diseases. Conventional pathogen detection methods, such as enzyme linked immunosorbent assay (ELISA), culturing or polymerase ... -
Probe microscopy methods and applications in imaging of biological materials
(Elsevier Ltd, 2018)Atomic force microscopy is an emerging tool for investigating the biomolecular aspects of cellular interactions; however, cell and tissue analyses must frequently be performed in aqueous environment, over rough surfaces, ... -
Probing hot-electron effects in wide area plasmonic surfaces using X-ray photoelectron spectroscopy
(American Institute of Physics Inc., 2014)Plasmon enhanced hot carrier formation in metallic nanostructures increasingly attracts attention due to potential applications in photodetection, photocatalysis, and solar energy conversion. Here, hot-electron effects in ... -
Resonant transmission of light through surface plasmon structures
(AIP Publishing, 2009)Plasmonics enables the realization of new optical components. Here, we report yet another plasmonic component based on a pair of surfaces displaying grating coupled plasmonenhanced transmission. We observe high quality ... -
Rounding corners of nano-square patches for multispectral plasmonic metamaterial absorbers
(OSA - The Optical Society, 2015)Multispectral metamaterial absorbers based on metal-insulatormetal nano-square patch resonators are studied here. For a geometry consisting of perfectly nano-square patches and vertical sidewalls, double resonances in the ... -
Self-assembled peptide nanofiber templated one-dimensional gold nanostructures exhibiting resistive switching
(American Chemical Society, 2012)An amyloid-like peptide molecule self-assembling into one-dimensional nanofiber structure in ethanol was designed and synthesized with functional groups that can bind to gold ions. The peptide nanofibers were used as ... -
Sensitivity comparison of localized plasmon resonance structures and prism coupler
(2014)Plasmon resonances are widely used in biomolecular sensing and continue to be an active research field due to the rich variety of surface and measurement configurations, some of which exhibit down to single molecule level ... -
A smartphone based surface plasmon resonance imaging (SPRi) platform for on-site biodetection
(Elsevier, 2017)We demonstrate a surface plasmon resonance imaging platform integrated with a smartphone to be used in the field with high-throughput biodetection. Inexpensive and disposable SPR substrates are produced by metal coating ... -
Supramolecular peptide nanofiber morphology affects mechanotransduction of stem cells
(American Chemical Society, 2017-08)Chirality and morphology are essential factors for protein function and interactions with other biomacromolecules. Extracellular matrix (ECM) proteins are also similar to other proteins in this sense; however, the complexity ... -
Surface enhanced Raman spectroscopy of unilamellar liposomes loaded with silver nanoparticles
(American Scientific Publishers, 2017)Imaging organic molecules using surface-enhanced Raman spectroscopy (SERS) has drawn attention due to its non-invasive nature and label-free approach. The SERS approach can be used in tracking organic molecules and monitoring ... -
Synthesis and size differentiation of Ge nanocrystals in amorphous SiO 2
(Springer, 2006)Germanosilicate layers were grown on Si substrates by plasma enhanced chemical vapor deposition (PECVD) and annealed at different temperatures ranging from 700-1010 °C for durations of 5 to 60 min. Transmission electron ... -
TEM studies of Ge nanocrystal formation in PECVD grown SiO 2: Ge / SiO2 multilayers
(Institute of Physics, 2006)We investigate the effect of annealing on the Ge nanocrystal formation in multilayered germanosilicate-oxide films grown on Si substrates by plasma enhanced chemical vapour deposition (PECVD). The multilayered samples were ... -
Thermally tunable ultrasensitive infrared absorption spectroscopy platforms based on thin phase-change films
(American Chemical Society, 2016-11)The thermal tunability of the optical and electrical properties of phase-change materials has enabled the decades-old rewritable optical data storage and the recently commercialized phase-change memory devices. Recently, ...
