We study photocurrent generation in individual suspended carbon nanotube pn junctions using spectrally-resolved scanning photocurrent microscopy. Spatial maps of the photocurrent allow us to determine the length of the pn junction intrinsic region, as well as the role of the n-type Schottky barrier. We show that reverse-bias operation eliminates complications...
Because ocean circulation impacts global heat transport, understanding the relationship between deep ocean circulation and climate is important for predicting the ocean's role in climate change. A common approach to reconstruct ocean circulation patterns employs the neodymium isotope compositions of authigenic phases recovered from marine sediments. In this approach, mild...
Over half of the U.S. coastline is found in Alaska, and the majority of the state’s economic activity occurs along the coast. Increased coastal development poses a potential threat to nearshore habitats in Alaska. The installation of artificial reef (AR) systems can mitigate habitat loss; however, few AR systems have...
This Instruction Memorandum (IM) provides the policy on tracking and reporting surface disturbance and reclamation within and outside of Greater Sage-grouse (GRSG) Priority Habitat Management Areas (PHMA). The Approved Resource Management Plan Amendments for the Rocky Mountain and Great Basin GRSG Regions and Nine Approved Resource Management Plans in the...
This Instruction Memorandum (IM) provides guidance for incorporating and analyzing thresholds and responses, as appropriate, into terms and conditions of grazing permits and the associated National Environmental Policy Act (NEPA) analysis within designated Greater Sage-Grouse (GRSG) Habitat as described in the Records of Decision for the Approved Resource Management Plan...
This paper studies the agglomeration of cellulose nanocrystals (CNCs) and uses ultrasonication to disperse CNCs in cement pastes in an attempt to improve strength. Rheological measurements show that when the concentration of CNCs exceeds 1.35% by volume in deionized water, agglomerates start to develop. This experimental finding is comparable to...