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

Amorphous In-Ga-Zn-O thin-film transistors fabricated by microcontact printing

Creator:: Du, Xiaosong, Frederick, Ryan T., Li, Yajuan, Zhou, Zheng, Stickle, William F., and Herman, Gregory S.
Abstract:: The authors present a facile, low-cost methodology to fabricate high-performance In-Ga-Zn-O (IGZO) bottom contact, bottom gate thin-film transistors (TFTs) by soft lithography. The IGZO channel and indium tin oxide (ITO) source and drain were patterned using microcontact printing of an octadecylphosphonic acid self-assembled monolayer (SAM). A polymer stamp was used...
Resource Type:: Article
Full Text:: & Technology B, 33(5), 052208. doi:10.1116/1.4929984 10.1116/1.4929984 American Institute of Physics

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

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

Improved stability of amorphous zinc tin oxide thin film transistors using molecular passivation

Creator:: Rajachidambaram, M. S., Pandey, A., Vilayurganapathy, S., Nachimuthu, P., Thevuthasan, S., and Herman, G. S.
Abstract:: The role of back channel surface chemistry on amorphous zinc tin oxide (ZTO) bottom gate thin film transistors (TFTs) has been characterized by positive bias-stress measurements and x-ray photoelectron spectroscopy. Positive bias-stress turn-on voltage shifts for ZTO-TFTs were significantly reduced by passivation of back channel surfaces with self-assembled monolayers of...
Resource Type:: Article
Full Text:: using molecular passivation. Applied Physics Letters, 103(17), 171602. doi:10.1063/1.4826457 10.1063

Continuous removal of glycerol from frozen-thawed red blood cells in a microfluidic membrane device

Creator:: Lusianti, Ratih E. and Higgins, Adam Z.
Abstract:: Cryopreservation of human red blood cells (RBCs) in the presence of 40% glycerol allows a shelf-life of 10 years, as opposed to only 6 weeks for refrigerated RBCs. Nonetheless, cryopreserved blood is rarely used in clinical therapy, in part because of the requirement for a time-consuming (~1 h) post-thaw wash...
Resource Type:: Article
Full Text:: , 8(5), 054124. doi:10.1063/1.4900675 10.1063/1.4900675 American Institute of Physics Publishing

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

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

Amorphous In-Ga-Zn-O thin-film transistors fabricated by microcontact printing

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

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

Improved stability of amorphous zinc tin oxide thin film transistors using molecular passivation

Continuous removal of glycerol from frozen-thawed red blood cells in a microfluidic membrane device

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

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