Index Catalog // ScholarsArchive@OSU

Determination of the Thermal Noise Limit of Graphene Biotransistors

Creator:: Crosser, Michael S., Brown, Morgan A., McEuen, Paul L., and Minot, Ethan D.
Abstract:: To determine the thermal noise limit of graphene biotransistors, we have measured the complex impedance between the basal plane of single-layer graphene and an aqueous electrolyte. The impedance is dominated by an imaginary component but has a finite real component. Invoking the fluctuation–dissipation theorem, we determine the power spectral density...
Resource Type:: Article

A two-color twist on test taking

Creator:: Selker, John
Abstract:: Test taking is a humiliating experience for many students, with no perceived direct educational benefit. That need not be so. When circumstances allow, I use a two-pen method of collaborative testing. Students have told me that they leave the exam having figured out what they didn’t understand, filled in the...
Resource Type:: Article
Full Text:: 60 June 2010 Physics Today www.physicstoday.org development

Electrical Monitoring of sp³ Defect Formation in Individual Carbon Nanotubes

Creator:: Wilson, Heather, Ripp, Sophie, Prisbrey, Landon, Brown, Morgan A., Sharf, Tal, Myles, Daniel J. T., Blank, Kerstin G., and Minot, Ethan D.
Abstract:: Many carbon nanotube (CNT) applications require precisely controlled chemical functionalization that is minimally disruptive to electrical performance. A promising approach is the generation of sp³ hybridized carbon atoms in the sp²-bonded lattice. We have investigated the possibility of using a carboxylic acid functionalized diazonium reagent to introduce a defined number...
Resource Type:: Article

Graphene Biotransistor Interfaced with a Nitrifying Biofilm

Creator:: Brown, Morgan A., Barker, Leila, Semprini, Lewis, and Minot, Ethan D.
Abstract:: Using a graphene field-effect transistor biosensor, we monitored the pH inside a living biofilm with fast temporal resolution (~ 1 s) over multi-hour time periods. The atomically-thin sensor is positioned between the biofilm and a supporting silicon oxide surface, providing non-invasive access to conditions at the base of the biofilm....
Resource Type:: Article

Dehydration as a Universal Mechanism for Ion Selectivity in Graphene and Other Atomically Thin Pores

Creator:: Sahu, Subin, Di Ventra, Massimiliano, and Zwolak, Michael
Abstract:: Ion channels play a key role in regulating cell behavior and in electrical signaling. In these settings, polar and charged functional groups, as well as protein response, compensate for dehydration in an ion-dependent way, giving rise to the ion selective transport critical to the operation of cells. Dehydration, though, yields...
Resource Type:: Article
Full Text:: , MD 20899 2Maryland Nanocenter, University of Maryland, College Park, MD 20742 3Department of Physics

Atomic ejection in the single crystal sputtering of nickel with 40-600 eV argon ions

Creator:: Leung, Yee Kit
Abstract:: A threestage, differentially pumped ion accelerator is used to produce low energy argon ions, which in turn, are used to bombard the surfaces of plane nickel single crystals. Nickel atoms ejected from the crystals are counted using the radioac tive tracing method. From the analysis of the angular distri butions...
Resource Type:: Dissertation
Full Text:: Philosophy in Physics presented on (6 , 19711 Title: ATOMIC EJECTION IN THE SINGLE CRYSTAL SPUTTERING OF

Effects of coupled atomic states on the resonance scattering of radiation

Creator:: Srivastava, Rajendra Prasad
Abstract:: The excitation and decay probabilities for resonance scattering of radiation from an atom with two coupled excited states and one ground state in an external static field are calculated as a function of time and frequency. Various oscillatory behaviors are found in all the probabilities. These oscillations depend on the...
Resource Type:: Dissertation
Full Text:: PHILOSOPHY in (Name of student) (Degree) Physics (Major) presented on 7;Z Date) TITLE: EFFECTS OF

Ion uptake by wheat (Triticum aestivum VILL., Host) as a function of soil water suction and soil temperature

Creator:: Young, Richard Su-Shung
Abstract:: The effects of soil temperature and soil water suction on the uptake of calcium, magnesium, and potassium by wheat (Triticum aestivum VILL., Host) were studied. Companion studies on uptake of nitrogen and phosphorus provided background for discussion of the results. Plants were grown in perlite slabs separated from an osmotic...
Resource Type:: Masters Thesis

Experimental analysis of subsurface heating and irrigation on the temperature and water content of soils

Creator:: Sepaskhah, Ali Reza
Abstract:: Multiple use of waste heat from power plants may become an important consideration in the development, siting, and certification of these plants. A multiple use system of components that can beneficially utilize waste heat may include home heating and cooling, greenhouses, animal enclosures, open basins for single cell protein production...
Resource Type:: Dissertation
Full Text:: . Ullery, Department of Soil Science, Dr. O.A. Boedtker, Physics Department, Dr. RH. Brooks, Department

Full membrane spanning self-assembled monolayers as model systems for UHV-based studies of cell-penetrating peptides

Creator:: Franz, Johannes, Graham, Daniel J., Schmüser, Lars, Baio, Joe E., Lelle, Marco, Peneva, Kalina, Müllen, Klaus, Castner, David G., Bonn, Mischa, and Weidnera, Tobias
Abstract:: Biophysical studies of the interaction of peptides with model membranes provide a simple yet effective approach to understand the transport of peptides and peptide based drug carriers across the cell membrane. Herein, the authors discuss the use of self-assembled monolayers fabricated from the full membrane-spanning thiol (FMST) 3-((14-((40-((5-methyl-1-phenyl-35-(phytanyl)oxy- 6,9,12,15,18,21,24,27,30,33,37-undecaoxa-2,3-dithiahenpentacontan-51-yl)oxy)-[1,10-biphenyl]-4- yl)oxy)tetradecyl)oxy)-2-(phytanyl)oxy...
Resource Type:: Article
Full Text:: , 10(1), 019009. doi:10.1116/1.4908164 10.1116/1.4908164 American Institute of Physics Publishing

ScholarsArchive@OSU

Determination of the Thermal Noise Limit of Graphene Biotransistors

A two-color twist on test taking

Electrical Monitoring of sp³ Defect Formation in Individual Carbon Nanotubes

Graphene Biotransistor Interfaced with a Nitrifying Biofilm

Dehydration as a Universal Mechanism for Ion Selectivity in Graphene and Other Atomically Thin Pores

Atomic ejection in the single crystal sputtering of nickel with 40-600 eV argon ions

Effects of coupled atomic states on the resonance scattering of radiation

Ion uptake by wheat (Triticum aestivum VILL., Host) as a function of soil water suction and soil temperature

Experimental analysis of subsurface heating and irrigation on the temperature and water content of soils

Full membrane spanning self-assembled monolayers as model systems for UHV-based studies of cell-penetrating peptides

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