Qiang Li

Qiang Li
Shanghai Jiao Tong University | SJTU · Advanced Materials Research Center

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658
Publications
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14,791
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Publications

Publications (658)
Article
Full-text available
Ultrafast control of structural and electronic properties of various quantum materials has recently sparked great interest. In particular, photoinduced switching between distinct topological phases has been considered a promising route to realize quantum computers. Here we use first-principles and effective Hamiltonian methods to show that in ZrTe...
Article
A 100 kW electron-beam (EB) high heat flux (HHF) test facility, named after Hefei Electron-beam high heat Flux Test facility, or HEFT for short, has been constructed in Institute of Plasma Physics Chinese Academy of Sciences (ASIPP) in order to test EAST divertor plasma facing components (PFCs) and CFETR small scale testing mock-ups. HEFT is equipp...
Article
Zirconium pentatelluride ZrTe5 is a topological semimetal. The presence of a temperature-induced Lifshitz transition, in which the Fermi level goes from the conduction band to the valence band with increasing temperature, provides unique opportunities to study the interplay between Fermi-surface topology, dynamics of Dirac fermions, and Berry curva...
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Full-text available
Shortwave infrared (SWIR) spectral imaging obtains spectral fingerprints corresponding to overtones of molecular vibrations invisible to conventional silicon-based imagers. However, SWIR imaging is challenged by the excessive cost of detectors. Single-pixel imaging based on compressive sensing can alleviate the problem but meanwhile presents new di...
Article
Ductile-brittle transition temperature (DBTT) is a critical property of tungsten (W) materials for their application in a fusion reactor. The mechanism of ductile-brittle transition (DBT) has been the focus of debate in past decades. In this work, four-point bending test (4PBT) was performed to explore the controlling factors in different direction...
Article
pH measurement has received extensive attention from researchers in numerous fields including medical diagnostics agriculture, food industry, marine, and chemical engineering. Owing to their electrode stability, drift degree, and preparation process, iridium/iridium oxide electrodes are considered as the most promising candidate for pH detection un...
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The lack of new drugs and resistance to existing drugs are serious problems in gastric cancer(GC) treatment. The research found polyphenols possess anti-Helicobacter pylori(Hp) and antitumor activities and may be used in the research and development of drugs for cancer prevention and treatment. However, polyphenols are affected by their chemical st...
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The Q factor in a quasi-BIC-based optical device can approach infinity and has therefore been attracting the attention of many researchers in recent years. However, this mode is barely applied to absorbers since it mainly tunes the radiative loss. The resonant wavelength of quasi-BICs normally couples with the Q factor, and it is difficult to indep...
Article
Multispectral camouflage, especially for the infrared-microwave range, is an essential technology for the safety of facilities, vehicles, and humans. So far, it has been realized mainly by high infrared specular reflection and high microwave absorption. However, external infrared sources can expose the target through specular reflection; also, the...
Preprint
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Recent angle-resolved $c$-axis resistivity measurements of the stripe-ordered La$_{2-x}$Ba$_x$CuO$_4$ (LBCO) with $x=1/8$ revealed an unexpected dependence on the direction of the in-plane magnetic field. We argue that these and other available data for the $c$-axis transport point to the existence in the $x=1/8$ LBCO below the stripe ordering temp...
Preprint
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We use the first principles and effective Hamiltonian methods to study the electronic structure and magnetic properties of a recently synthesized layered antiferromagnetic square net topological semimetal EuZnSb$_2$ [1]. The main message of the paper is that effects of small changes in the band structure produced by the magnetic ordering and change...
Article
Long‐wave infrared (LWIR) of 8–14 μm is an imperative atmospheric transmission window for applications such as infrared detectors, radiative cooling, and infrared stealth. Attempts to manipulate thermal emission in the LWIR band consist of either directional emission but narrowband or LWIR emission but non‐directional. Directional thermal emission...
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Lightweight, miniaturized optical imaging systems are vastly anticipated in these fields of aerospace exploration, industrial vision, consumer electronics, and medical imaging. However, conventional optical techniques are intricate to downscale as refractive lenses mostly rely on phase accumulation. Metalens, composed of subwavelength nanostructure...
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The ultra-quantum limit is achieved when a magnetic field confines an electron gas in its lowest spin-polarised Landau level. Here we show that in this limit, electron doped ZrTe 5 shows a metal-insulator transition followed by a sign change of the Hall and Seebeck effects at low temperature. We attribute this transition to a magnetic freeze-out of...
Preprint
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The ultra-quantum limit is achieved when a magnetic field confines an electron gas in its lowest spin-polarised Landau level. Here we show that in this limit, electron doped ZrTe$_5$ shows a metal-insulator transition followed by a sign change of the Hall and Seebeck effects at low temperature. We attribute this transition to a magnetic freeze-out...
Preprint
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The interpretation of how superconductivity disappears in cuprates at large hole doping has been controversial. To address this issue, we present an experimental study of single-crystal and thin film samples of La$_{2-x}$Sr$_x$CuO$_4$ (LSCO) with $x\ge0.25$. In particular, measurements of bulk susceptibility on LSCO crystals with $x=0.25$ indicate...
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We developed a new, all-solid-state reference electrode using high-densified NASICON ceramics. In order to understand the influence of hydrothermal vent conditions, some NASICON ceramic specimens were treated under 400 °C 40 MPa supercritical conditions. The characteristics and stability of the as-prepared reference electrode before and after super...
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Active temperature control devices are widely used for the thermal management of enclosures, including vehicles and buildings. Passive radiative cooling has been extensively studied; however, its integration with existing actively temperature regulated and decorative enclosures has slipped out of the research at status quo. Here, we present a photo...
Preprint
Flat metasurfaces with subwavelength meta-atoms can be designed to manipulate the electromagnetic parameters of incident light and enable unusual light-matter interactions beyond the capabilities of the constituent materials themselves. Although hydrogel-based metasurfaces have the potential to control optical properties dynamically in response to...
Article
Generally, commercial textiles show high mid-infrared emissivity and the thermal radiation accounts around 50% of the heat loss. However, conventional clothes usually increase the thickness to reduce the heat conduction without considering lowering the mid-IR emissivity. Thus textiles with reducing infrared emissivity for passive radiative heating...
Preprint
Laser-induced periodic surface structures (LIPSSs) on various materials have been extensively investigated because of their wide applications. The combination of different materials allows for greater freedom in tailoring their functions and achieving responses not possible in a homogeneous material. By utilizing a femtosecond (fs) laser to irradia...
Preprint
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The recently observed photoinduced metastable state in the iron-chalcogenide superconductors has emerged as a novel platform to study the interactions that lead to superconductivity. Here we directly observe the photoinduced changes to the electronic band structure with high energy resolution to determine the relationship between the metastability...
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Thermal emission engineering with ability to realize spectral and spatial selection has attracted great attention in recent years. Nanophotonic control of thermal radiation has demonstrated narrowband thermal emitter but with high angle-sensitivity and diffuse thermal emitter but with low quality factor ( Q ). Here, we demonstrate a simultaneous na...
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Understanding the driving mechanisms behind metal-insulator transitions (MITs) is a critical step towards controlling material's properties. Since the proposal of charge-order-induced MIT in magnetite Fe3O4 in 1939 by Verwey, the nature of the charge order and its role in the transition have remained elusive-a longstanding challenge in the studies...
Article
SiC is a widely used material. Understanding how oxygen content affects the SiC structure and properties is crucial. In this paper, heat treatment was used to prepare SiC powder samples with different oxygen contents, which were doped with AlN and ZrB2 and were densified by pressureless sintering at 2050 °C. The effect of oxygen content on the sint...
Article
Background: A lack of research on the association of trefoil factors (TFFs) with gastric cancer (GC) and premalignant lesions (PMLs) in the general populations is an important obstacle to the application of TFFs for GC screening. We aimed to analyze the association of TFFs with GC and PMLs in a general population. Methods: We evaluated 3,986 adu...
Preprint
Zirconium pentatelluride ZrTe5 is a topological semimetal. The presence of a temperature induced Lifshitz transition, in which the Fermi level goes from the conduction band to the valence band with increasing temperature, provides unique opportunities to study the interplay between Fermi-surface topology, dynamics of Dirac fermions, and Berry curva...
Article
Full-text available
Purpose of WEST is to test key technologies for future device like ITER. In particular the actively cooled plasma facing component technology, the so-called tungsten monoblock, will equip the lower divertor, allowing studies and analyses of the plasma wall interaction. 456 plasma-facing components have been manufactured during the last years, using...
Article
A hypervapotron cooling concept armored with flat tiles has been considered as a possible technique to handle heat load about 10–20 MW/m² produced in a fusion reactor. In order to improve the heat removal capability of divertor plasma facing components (PFCs) of the China Fusion Engineering Test Reactor (CFETR), W/Cu flat-type mock-up based on a no...
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(1) Background: The study aims to estimate the prevalence of normal weight with central obesity (NWCO) and to examine the relationship between NWCO and cardiovascular disease risk factors in adults of the province of Shaanxi. (2) Methods: A population-based cross-sectional survey was conducted among residents who were aged 18–80 years and had been...
Preprint
Full-text available
Ultrafast optical control of the structural and electronic properties of various quantum materials has recently sparked great interest. In particular, photoinduced quantum phase transition between distinct topological phases has been considered as a promising route to realize ultrafast topological quantum computers. Here we use first-principles and...
Preprint
Full-text available
Charge order is commonly believed to compete with superconducting order. An intertwined form of superconducting wave function, known as pair-density-wave (PDW) order, has been proposed; however, there has been no direct evidence, theoretical or experimental, forms the ground state of any cuprate superconductor. As a test case, we consider La$_{2-x}...
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Dynamic structural color based on tunable optical resonance plays a key role in applications including encryption visualization, camouflage and colorimetric sensing. However, the current design requires either complex growth processes of the high-quality tunable materials or complicated circuit designs. This work makes a humidity-swelling hydrogel...
Article
Dielectric super-absorbing (>50%) metasurfaces, born of necessity to break the 50% absorption limit of an ultrathin film, offer an efficient way to manipulate light. However, in previous works, super absorption in dielectric systems was predominately realized via making two modes reach the degenerate critical coupling condition, which restricted th...
Article
Tailoring the absorption/emission through nanostructures from broadband to narrowband has attracted increasing attention due to the merits of high efficiency and compactness. However, most of the reported narrowband emitters require either complex fabrication process or thick coating of the suitable materials (~mm). In this paper, by exciting Berre...
Article
Fatigue property of W/steel joints is important for predicting the life of First Wall (FW). Few facilities can satisfy the harsh coolant parameters of FW. It is necessary to develop a method to evaluate the fatigue property, using coolant with normal pressure and temperature, for example 0.2 MPa and 25 ℃. Combining numerical calculation and experim...
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Using powders treated by sand milling as starting materials, high densified lithium lanthanum titanium oxide (LLTO) ceramics with high conductivity were prepared. A novel all-solid-state reference electrode was fabricated using the as-prepared LLTO ceramics for electrochemical measurements in marine environments that require robustness, no clogging...
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Vanadium oxide (VO 2 ) finds a wide range of applications owing to its excellent reversible phase change properties. We demonstrate a method for doping a polymer with VO 2 nanoparticles towards realizing a thermal emissivity modulation device, which is expected to supplement the conventional preparation of VO 2 film layers using magnetron sputterin...
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Thermal emissivity is one of the most important indices used to evaluate thermal emission capability of an object and is essential for characterization of thermal emitters, especially in the field of infrared thermal emission engineering for various applications, including personal thermal management, radiative cooling and heat preservation, infrar...
Article
New surprises continue to be revealed about La2CuO4, the parent compound of the original cuprate superconductor. Here we present neutron scattering evidence that the structural symmetry is lower than commonly assumed. The static distortion results in anisotropic Cu-O bonds within the CuO2 planes; such anisotropy is relevant to pinning charge stripe...
Article
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Sensing Microcystin-LR (MC-LR) is an important issue for environmental monitoring, as the MC-LR is a common toxic pollutant found in freshwater bodies. The demand for sensitive detection method of MC-LR at low concentrations can be addressed by metasurface-based sensors, which are feasible and highly efficient. Here, we demonstrate an all-dielectri...
Preprint
Full-text available
Background The lack of effective biomarkers for screening gastric cancer (GC) and premalignant lesions (PMLs) is a significant roadblock in the prevention and early intervention of GC. We aimed to identify noninvasive biomarkers to improve the screening of high-risk populations. Methods We evaluated 25,000 adults residing in Wuwei. We collected ba...
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Background: Hepatocellular carcinoma (HCC) is one of the highly heterogeneous cancers that lacks an effective risk model for prognosis prediction. Therefore, we searched for angiogenesis-related immune genes that affected the prognosis of HCC to construct a risk model and studied the role of this model in HCC. Methods: In this study, we collected t...
Article
The development of ultrathin, flexible, large‐scale, high‐temperature‐tolerant infrared camouflage devices, which are immune to the external environment, has emerged as an important unsolved challenge. This paper proposes an infrared camouflage device based on the Lambertian surface. The proposed device simultaneously exhibits low emissivity (≈0.1)...
Preprint
Full-text available
Background: Defined by normal body mass index (BMI) and higher waist-to-height ratio, normal weight with central obesity (NWCO) has been recognised as a risk factor for cardio-metabolic diseases. The study aims to estimate the prevalence of NWCO and to examine the relationship between NWCO and cardiovascular disease risk factors in adults of Shaanx...
Preprint
Full-text available
New surprises continue to be revealed about La$_2$CuO$_4$, the parent compound of the original cuprate superconductor. Here we present neutron scattering evidence that the structural symmetry is lower than commonly assumed. The static distortion results in anisotropic Cu-O bonds within the CuO$_2$ planes; such anisotropy is relevant to pinning char...
Article
Full-text available
Outdoor personal thermal comfort is of substantial significance to ameliorate the health conditions of pedestrian and outdoor laborer. However, the uncontrollable sunlight, substantial radiative loss, and intense temperature fluctuations in the outdoor environment present majestic challenges to outdoor personal thermal management. Here, we report a...
Article
Much effort has been devoted to the electronic properties of relatively thick ZrTe5 crystals, focusing on their three-dimensional topological effects. Thin ZrTe5 crystals, on the other hand, were much less explored experimentally. Here we present detailed magnetotransport studies of few-layer ZrTe5 devices, in which electron-electron interactions a...
Article
Objective: This study aimed to determine the prevalence and risk factors of Helicobacter pylori infection across all age groups in Wuwei City, a high-risk area for gastric cancer in Northwest China. Methods: We conducted this study from 2016 to 2017 in an urban and a rural community in Wuwei City. Stool antigen tests targeted individuals aged 0...
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Interminable surveillance and reconnaissance through various sophisticated multispectral detectors present threats to military equipment and manpower. However, a combination of detectors operating in different wavelength bands (from hundreds of nanometers to centimeters) and based on different principles raises challenges to the conventional single...
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Magnetic resonance and electrical resonance can be excited simultaneously by the incident light source in high refractive index all-dielectric metasurfaces. They can manipulate light waves to a certain extent and can be used in many fields. Silicon is widely used in all-dielectric metasurfaces due to its high refractive index and low loss in near i...
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By applying pulsed laser and CW laser to irradiate the top layer phase-change material GST, we realized reversible optical switching of reflectance of a layered structure. The FTIR measured reflectance spectrum proved that the reflectivity at 8 μm could be changed reversibly from 0.19 to 0.90. Our research may have some inspiration for active therm...
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High sensitivity detection of acetylcholinesterase (Ache) concentration is an important method for water pollution control and treatment. Compared with commonly used detection methods, the dielectric nanoantenna detection method is more direct, efficient, and safer. In this paper, we first studied a silicon disk dielectric antenna for the detection...
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Metal nanomaterials have been widely used to generate photoacoustic (PA) signals because of their high optical absorption characteristics. However, the PA conversion efficiency of metal nanomaterials is limited by the single-wavelength absorption at the resonant peak. To mitigate this issue, a three-layer ultrathin film containing a thin PDMS layer...
Preprint
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Background The China Northwest Cohort study (CNC), a community population-based prospective observational study, aimed to investigate specific aetiology causes of NCDs and the long-term health hazards of NCDs in the northwest region of China with different ethnic groups.Study design and methodsA total of 118,572 participants (aged 35–74 years and i...
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Background The association between dietary carbohydrate consumption and blood pressure (BP) is controversial. The present study aimed to evaluate the possible gender-specific association of carbohydrate across the whole BP distribution. Method Cross-sectional survey including 2241 rural adults was conducted in northwestern China in 2010. BP was me...
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Both Zn doping and c-axis magnetic fields have been observed to increase the spin stripe order in La2−xBaxCuO4 with x close to 1/8. For x=0.095, the applied magnetic field also causes superconducting layers to decouple, presumably by favoring pair-density-wave order that consequently frustrates interlayer Josephson coupling. Here we show that intro...
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To develop highly efficient T1/T2 magnetic resonance imaging (MRI) contrast agents (CAs), Gd/Y hydroxide nanosheets were synthesized by a simple exfoliation method from layer compounds using sodium polyacrylate (PAA) as a dispersant and stabilizer. Transmission electron microscopy (TEM) and atomic force microscopy (AFM) results revealed the excelle...
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High-temperature infrared (IR) camouflage is crucial to the effective concealment of high-temperature objects but remains a challenging issue, as the thermal radiation of an object is proportional to the fourth power of temperature (T4). Here, we experimentally demonstrate high-temperature IR camouflage with efficient thermal management. By combini...
Preprint
Full-text available
Enhancing the personal thermal comfort in outdoor environment is of substantial significance to ameliorate the health conditions of pedestrian and outdoor laborer. However, the uncontrollable sunlight, substantial radiative loss, and intense temperature change in the outdoor environment present majestic challenges to outdoor personal thermal manage...