Xiaoyue Ni

Journal Article Proceedings of the National Academy of Sciences of the United States of America · November 2022 A quantitative understanding of the coupled dynamics of flow and particles in aerosol and droplet transmission associated with speech remains elusive. Here, we summarize an effort that integrates insights into flow-particle dynamics induced by the producti ... Full text Cite

A dynamically reprogrammable surface with self-evolving shape morphing.

Journal Article Nature · September 2022 Featured Publication Dynamic shape-morphing soft materials systems are ubiquitous in living organisms; they are also of rapidly increasing relevance to emerging technologies in soft machines1-3, flexible electronics4,5 and smart medicines6. Sof ... Full text Cite

Soft shape-programmable surfaces by fast electromagnetic actuation of liquid metal networks.

Journal Article Nature communications · September 2022 Low modulus materials that can shape-morph into different three-dimensional (3D) configurations in response to external stimuli have wide-ranging applications in flexible/stretchable electronics, surgical instruments, soft machines and soft robotics. This ... Full text Cite

Sensing, processing, computing and networking for the era of wearables

Journal Article Digital Signal Processing A Review Journal · June 15, 2022 Full text Cite

A dynamically reprogrammable metasurface with self-evolving shape morphing

Journal Article Nature · December 9, 2021 Dynamic shape-morphing soft materials systems are ubiquitous in living organisms; they are also of rapidly increasing relevance to emerging technologies in soft machines, flexible electronics, and smart medicines. Soft matter equipped with responsive compo ... Full text Cite

Sensing beyond itself: Multi-functional use of ubiquitous signals towards wearable applications

Journal Article Digital Signal Processing A Review Journal · September 1, 2021 Wearable technologies provide a non-invasive way to monitor user's activity, identity, and health in real-time, which have attracted tremendous interests from both academia and industry. Due to constraints in form factor and power consumption, the sensing ... Full text Cite

A Wireless Near-Infrared Spectroscopy Device for Flap Monitoring: Proof of Concept in a Porcine Musculocutaneous Flap Model

Journal Article Journal of Reconstructive Microsurgery · August 17, 2021 Abstract Background Current near-infrared spectroscopy (NIRS)-based systems for continuous flap monitoring are highly sensitive for detecting malperfusion. However, the clinical utility and user experience are lim ... Full text Cite

Automated, multiparametric monitoring of respiratory biomarkers and vital signs in clinical and home settings for COVID-19 patients.

Journal Article Proceedings of the National Academy of Sciences of the United States of America · May 2021 Featured Publication Capabilities in continuous monitoring of key physiological parameters of disease have never been more important than in the context of the global COVID-19 pandemic. Soft, skin-mounted electronics that incorporate high-bandwidth, miniaturized motion sensors ... Full text Cite

Differential cardiopulmonary monitoring system for artifact-canceled physiological tracking of athletes, workers, and COVID-19 patients.

Journal Article Science advances · May 2021 Soft, skin-integrated electronic sensors can provide continuous measurements of diverse physiological parameters, with broad relevance to the future of human health care. Motion artifacts can, however, corrupt the recorded signals, particularly those assoc ... Full text Cite

A skin-conformable wireless sensor to objectively quantify symptoms of pruritus.

Journal Article Science advances · April 2021 Itch is a common clinical symptom and major driver of disease-related morbidity across a wide range of medical conditions. A substantial unmet need is for objective, accurate measurements of itch. In this article, we present a noninvasive technology to obj ... Full text Cite

Designing Mechanical Metamaterials with Kirigami‐Inspired, Hierarchical Constructions for Giant Positive and Negative Thermal Expansion

Journal Article Advanced Materials · December 2, 2020 Full text Link to item Cite

Mechano-acoustic sensing of physiological processes and body motions via a soft wireless device placed at the suprasternal notch.

Journal Article Nature biomedical engineering · February 2020 Featured Publication Skin-mounted soft electronics that incorporate high-bandwidth triaxial accelerometers can capture broad classes of physiologically relevant information, including mechano-acoustic signatures of underlying body processes (such as those measured by a stethos ... Full text Cite

Measurement of mechanical losses in the carbon nanotube black coating of silicon wafers

Journal Article Classical and Quantum Gravity · January 9, 2020 Full text Cite

2D Mechanical Metamaterials with Widely Tunable Unusual Modes of Thermal Expansion.

Journal Article Advanced materials (Deerfield Beach, Fla.) · November 2019 Featured Publication Most natural materials expand uniformly in all directions upon heating. Artificial, engineered systems offer opportunities to tune thermal expansion properties in interesting ways. Previous reports exploit diverse design principles and fabrication techniqu ... Full text Cite

Bioresorbable photonic devices for the spectroscopic characterization of physiological status and neural activity.

Journal Article Nature biomedical engineering · August 2019 Capabilities in real-time monitoring of internal physiological processes could inform pharmacological drug-delivery schedules, surgical intervention procedures and the management of recovery and rehabilitation. Current methods rely on external imaging tech ... Full text Cite

Yield Precursor Dislocation Avalanches in Small Crystals: The Irreversibility Transition.

Journal Article Physical review letters · July 2019 Featured Publication The transition from elastic to plastic deformation in crystalline metals shares history dependence and scale-invariant avalanche signature with other nonequilibrium systems under external loading such as colloidal suspensions. These other systems exhibit t ... Full text Cite

Deformation of Crystals: Connections with Statistical Physics

Journal Article Annual Review of Materials Research · July 3, 2017 We give a bird's-eye view of the plastic deformation of crystals aimed at the statistical physics community, as well as a broad introduction to the statistical theories of forced rigid systems aimed at the plasticity community. Memory effects in ma ... Full text Cite

Probing Microplasticity in Small-Scale FCC Crystals via Dynamic Mechanical Analysis

Journal Article Physical Review Letters · April 14, 2017 Featured Publication Full text Cite

Exceptional Resilience of Small-Scale Au₃₀Cu₂₅Zn₄₅ under Cyclic Stress-Induced Phase Transformation.

Journal Article Nano letters · December 2016 Shape memory alloys that produce and recover from large deformation driven by martensitic transformation are widely exploited in biomedical devices and microactuators. Generally their actuation work degrades significantly within first a few cycles and is r ... Full text Cite

An instrument to measure mechanical up-conversion phenomena in metals in the elastic regime.

Journal Article The Review of scientific instruments · June 2016 Featured Publication Crystalline materials, such as metals, are known to exhibit deviation from a simple linear relation between strain and stress when the latter exceeds the yield stress. In addition, it has been shown that metals respond to varying external stress in a disco ... Full text Cite