United States Air Force Research Laboratory

Peptide-Directed Nanomaterials to Elucidate Compositional Effects in Bimetallic Nanoparticle Catalysts

Abstract Multimetallic nanoparticle catalysts present exciting opportunities to achieve sustainable chemical transformations based on their unique structure that can lead to enhanced reactivity, especially when a blend of functional metal atoms is incorporated. The fundamental sc...

Dispersive Optical Activity of ( S )-2-Methylaziridine: Intrinsic Properties and Extrinsic Solvation Effects

Abstract The dispersive optical activity of conformationally flexible S-2-methylaziridine (S-2-MeAz) has been investigated experimentally under isolated and solvated conditions to elucidate the impacts of large-amplitude (conformational) and small-amplitude (vibrational) nuclear...

Nonequilibrium Flow Around a Blunt Wedge

In this study, we investigate Mach 15 hypersonic flow of a five-species air mixture over a 15 deg blunt wedge, accounting for nonequilibrium aerothermodynamic effects. Prior investigations at this flight condition have employed a range of methodologies, including particle-based a...

Multiscale modeling of the electroviscoelasticity of charged polymers in combined flow and electric fields

The behavior of polymers in combined flow and electric fields underlies many manufacturing processes but remains poorly understood. We model charged polymers across scales, extending the Rouse model for a bead-spring chain to include a charge density distributed along the polymer...

Scalable, Simple, and Versatile Encapsulation of 2D Materials and Devices

Abstract Air-sensitive 2D materials present fundamental challenges for device integration. Encapsulation is required to preserve intrinsic properties, yet conventional strategies require complicated fabrication workflows and fail with thicker flakes. We demonstrate that electron-...

Training-free post-disaster damage estimation with incomplete satellite images by integrating open data and fractional hot deck imputation

Abstract Analyzing satellite imagery is an essential step after a severe natural disaster for monitoring the level of damage and making the best decision. The current study proposes a fast post-disaster damage framework incorporating the remote sensing of imagery, entropy calcula...

Pretraining vagus nerve stimulation differently influences cognition and anxiety-like behavior in male and female rats across estrous cycle stages

Vagus nerve stimulation (VNS) has previously been shown to enhance cognitive performance in rats when administered post-behavioral paradigm training. However, the effects of VNS administered pre-training, and its potential sex and hormonal dependencies, are not well understood. H...

SKYLIGHT: A Scalable Hundred-Channel 3D Photonic In-Memory Tensor Core Architecture for Real-time AI Inference

The growing computational demands of artificial intelligence (AI) are challenging conventional electronics, making photonic computing a promising alternative. However, existing photonic architectures face fundamental scalability and reliability barriers. This paper introduces SKY...