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Displaying: 21 - 30 of 38 Results
Improving spin coherence lifetimes of nitrogen-vacancy ensembles using sequences of RF pulses
Diamond nitrogen vacancy (NV) centers are of great interest for scalable applications in quantum information and metrology, such as precise measurements of electric and magnetic fields. Although remarkably long electronic spin coherence times…
Investigators
- Ronald Walsworth
- My Linh Pham
Spin-Lock Induced Crossing (SLIC) pulse sequence for NMR spectroscopy and imaging
Nuclear magnetic resonance (NMR) spectroscopy is an important tool for determining the chemical structure of molecules, and it is used extensively for biomedical research and drug discovery. However, in many samples the frequency signatures of…
Investigators
- Ronald Walsworth
- Stephen DeVience
- Matthew Rosen
Hyperpolarized contrast agents for MRI with long relaxation times
When the nuclear orientation of a material is hyperpolarized by techniques such as dynamic nuclear polarization, these materials can function as extremely effective contrast agents for magnetic resonance imaging (MRI). In most cases, however, the…
Investigators
- Charles Marcus
Multi-color electron microscopy enabled by nanoparticle cathodoluminescence
Tunable cathodoluminescent nanoparticles enable the acquisition of images with both molecular specificity and nanoscale resolution, in a single instrument. Multi-color images can be generated by irradiating nanodiamonds which have been tuned to emit…
Investigators
- Ronald Walsworth
- Jeffrey Lichtman
- Narayanan Kasthuri
- David Glenn
- Huiliang Zhang
- Richard Schalek
Non-invasive real-time detection of hardware trojans
Integrated circuit (IC) trojans are a significant security threat to our communications, cloud and IT infrastructure. These rogue modifications to semiconductors can be triggered at any point and represent a latent risk. A hostile government or…
Investigators
- Marko Loncar
- Linbo Shao
Wearable gait analysis system for measuring overstriding in runners
Roughly 50% of the 20 million active runners in the United States are injured each year, with overstriding being a major cause. Proper gait is essential to minimizing the risk of injury, but perfecting it requires constant monitoring of one's…
Investigators
- Conor Walsh
- Panagiotis Polygerinos
- Daniel Lieberman
- Stephanie Liu
Strong and flexible hydrogels below water freezing temperature
Hydrogels are highly absorbent gels in which the swelling agent is water. They’re used in a wide range of biomedical and commercial applications, such as tissue engineering, wound healing, cell culture, contact lenses, and disposable diapers. This…
Investigators
- Joost Vlassak
- Widusha Illeperuma
- Zhigang Suo
Highly specific chemical detection using NMR at low magnetic fields
NMR often does not have sufficient resolution to distinguish between chemicals with related or similar structures in the presence of a large background, which leads to poor chemical specificity. The NMR spectra of complex chemical mixtures may…
Investigators
- Ronald Walsworth
- Matthew Rosen
- Stephen DeVience
A new approach to NMR: High resolution spatial holographic encoding using traveling wave MR
This technology is for using a high field MR system to record interference patterns within biological phantoms combined with new spatial encoding methods to give contrast at resolution limits far exceeding traditional gradient-based encoding…
Investigators
- Andrew Kiruluta
Investigators
- Marko Loncar
- Qimin Quan