Single-walled carbon nanotubes (SWNT) are grown by a plasma enhanced chemical vapor deposition (PECVD) method at 600 °C. The nanotubes are of high quality as characterized by microscopy, Raman spectroscopy, and electrical transport measurements. High performance field effect transistors are obtained with the PECVD nanotubes. Interestingly, electrical… (More)
Two-terminal protonic devices with PdHx proton conducting contacts and a Nafion channel achieve 25 ms spiking, short term depression, and low-energy memory switching.
Proton conduction is essential in biological systems. Oxidative phosphorylation in mitochondria, proton pumping in bacteriorhodopsin, and uncoupling membrane potentials by the antibiotic Gramicidin are examples. In these systems, H(+) hop along chains of hydrogen bonds between water molecules and hydrophilic residues - proton wires. These wires also support… (More)
Iron containing nanoparticles are found to spontaneously form on hydroxylated SiO 2 substrates when immersed in a freshly mixed aqueous solution of FeCl 3 and hydroxylamine. Upon calcination, a submonolayer of uniformly distributed iron oxide nanoparticles can be derived and used to catalyze the growth of single-walled carbon nanotubes by chemical vapor… (More)
Materials: Chitin squid extract (Industrial Research Ltd-New Zealand), Lithium chloride (Sigma Life Science), N,N-dimethylacetamide (Sigma Aldrich) and hexafluoro 2-propanol (Sigma Aldrich) are used as received. Silicon wafers (Universal wafers) or glass coverslips (Ted Pella, Inc) are carefully rinsed in ethanol and deionized water prior to use.… (More)
As the dimensions of electronic devices approach those of molecules, the size, geometry, and chemical composition of the contact electrodes play increasingly dominant roles in device functions. It is shown here that single-walled carbon nanotubes (SWNT) can be used as quasi-one-dimensional (1D) electrodes to construct organic field effect transistors (FET)… (More)
An easy-to-use tuberculosis skin test is developed with chitin microneedles that deliver purified protein derivative at the correct skin depth and result in a positive test in BCG-immunized guinea pigs.
Figure SI-1. Line cross-sections corresponding to the AFM images in Figures 1b and 1c. Ge nanoribbons were written at 12 V and 1 !m s-1 and 14 V and 100 !m s-1 respectively. Figure SI-2. Current voltage characteristics measured during deposition. Voltage is measured on the sample. No deposition occurs for negative sample voltages, nor positive sample… (More)
Fusion of a palladium-binding peptide to an archaeal rhodopsin promotes intimate integration of the lipid-embedded membrane protein with a palladium hydride protonic contact. Devices fabricated with the palladium-binding deltarhodopsin enable light-activated conversion of protonic currents to electronic currents with on/off responses complete in seconds and… (More)
Experiments and simulations are used to elucidate a new class of chemical reactions occurring near the tip-sample interface during high field chemistry of diphenylgermane. Current data during writing and bias dependent growth rate are analyzed, supplemented with data from ionization mass spectrometry, and compared with the simulation results.