ADVANCED MATERIALS
·
2025
·
IF 26.8
Qingkai Chen,Shijun Zhao,Yu Han,Yancheng Wang,Deqing Mei,Qiang Li,Keqiao Li,Yang Li
Dynamic thermal camouflage conceals objects from infrared detection by modulating surface emissivity to match the thermal signature of the background. However, existing emissivity modulation systems fail to perform effectively across both hot backgrounds, such as sun-heated buildings and roads, and cold backgrounds, such as open fields. Here, an adaptive metaskin capable of operating in either active (externally powered) or passive mode is demonstrated, enabling effective camouflage across diverse thermal environments. This is achieved through the synergistic integration of a plasmonic MXene metasurface and a reprogrammable liquid crystal elastomer. The metaskin offers both a wide, continuously tunable emissivity range (≈41%) and a rapid temperature response (1.2 s), selectively triggered in the passive mode. In cold backgrounds (e.g., 20 °C), the system operates in an active mode, delivering a non-volatile low-emissivity state that conceals objects across a wide temperature range (e.g., 20–120 °C). In hot backgrounds (e.g., 50 °C), it switches to passive mode, autonomously modulating its emissivity and maintaining an average infrared contrast of just 4.7 °C for objects of 50–120 °C. This dual-mode design is expected to address the challenges of active and passive thermal camouflage, opening new possibilities for dynamic thermal radiation management.
研究领域:
材料科学
·
光学
·
热工技术
·
纳米技术
·
红外成像
·
智能材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICS LETTERS
·
2019
·Vol. 44
·期 10
·2450-2453
·
IF 3.866
Shi-Tong Xu,Fei Fan,Yun-Yun Ji,Jie-Rong Cheng,Sheng-Jiang Chang
We experimentally demonstrate an active terahertz (THz) resonance switch induced by the polarization conversion in a compound metasurface, which is a LC layer sandwiched by a metallic wire grating and resonance metamaterial (LCGM). Here, the liquid crystal (LC) plays the role of polarization conversion, which can induce the TE resonance. Moreover, there exists a localized resonance between metallic grating and metamaterial layers, and then the excited resonance will be greatly enhanced. The results show that the high extinction ratio of the resonance switch exceeds 30 dB at 0.82 THz. This work will bring new ideas for the research in developing THz phase, polarization, and switch devices with LC and metasurface.
研究领域:
光学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
Optical Materials Express
·
2020
·Vol. 10
·期 4
·1053-1060
·
IF 3.064
Sen Zhang,Lei Feng,Hui Zhang,Mingze Liu,Ting Xu
The electrochromic modulation of plasmonic metasurfaces showing structural colors is a promising strategy to realize dynamic electronic reflective displays. However, hybridizing electrochromic polymers with large-area plasmonic metasurfaces remains challenging. In this study, we present a poly(3,4-ethylenedioxythiophene) (PEDOT)-coated gold nanodisk (PCGN) metasurface, which is fabricated based on techniques of large-area anodic aluminum oxide template-assisted deposition and electrochemical polymerization. Experimental and numerical results demonstrated that fast and reversible electrochromic modulation was realized within the PCGN metasurface. The wavelength control of the localized surface plasmon resonance of the PCGN metasurface originated from the electrically driven refractive index change of the PEDOT layer. The PCGN metasurface is promising for the high yield manufacturing of devices applied in dynamic reflective displays.
研究领域:
材料科学
·
光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Zekui Zhang,Leipeng Zhang,Zichen Ren,Yike Zhang,Tingting Hao,Dongqi Liu,Lei Xu,Wenchao Liu,Jiawu Sun,Haoyu Ji,Yuqiang Wang
The development of stealth devices that are compatible with both infrared (IR) and radar systems remains a significant challenge, as the material properties required for effective IR and radar stealth are often contradictory. In this work, based on an IR electrochromic device (IR-ECD), concepts of metamaterial manipulating electromagnetic waves are applied to develop a multifunctional ultrathin metasurface with a low radar cross section (RCS) and variable infrared emissivity. This paper presents a linear-to-linear polarization conversion metasurface (PCM) designed by hollowing the IR-ECD. In this way, the IR-ECD based on polyaniline (PANI) can also modulate the reflection waves in the microwave band without affecting its features in the infrared region. Thus, the proposed metasurface integrates both microwave stealth and variable infrared emissivity through a single layer. The measured results show that a 10 dB RCS reduction is achieved in the band of 8.46–9.5 GHz, and the infrared emissivity can be adjusted from 0.870 to 0.513 in the infrared stealth band of 8–14 μm. Due to the ultrathin thickness (only 0.081λ0 at 9 GHz), low RCS in the X-band, and variable infrared emissivity, the designed multifunctional stealth metasurface has promising applications on military platforms with various surrounding environments.
研究领域:
材料科学
·
电磁学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Biosensors-Basel
·
2024
·Vol. 14
·期 5
·240
·
IF 4.9
Dongpeng Luo,Limin Xu,Lifeng Jia,Lianglun Cheng,Ping Tang,Jinyun Zhou
Cashmere and wool are both natural animal fibers used in the textile industry, but cashmere is of superior quality, is rarer, and more precious. It is therefore important to distinguish the two fibers accurately and effectively. However, challenges due to their similar appearance, morphology, and physical and chemical properties remain. Herein, a terahertz electromagnetic inductive transparency (EIT) metasurface biosensor is introduced for qualitative and quantitative identification of cashmere and wool. The periodic unit structure of the metasurface consists of four rotationally symmetric resonators and two cross−arranged metal secants to form toroidal dipoles and electric dipoles, respectively, so that its effective sensing area can be greatly improved by 1075% compared to the traditional dipole mode, and the sensitivity will be up to 342 GHz/RIU. The amplitude and frequency shift changes of the terahertz transmission spectra caused by the different refractive indices of cashmere/wool can achieve highly sensitive label−free qualitative and quantitative identification of both. The experimental results show that the terahertz metasurface biosensor can work at a concentration of 0.02 mg/mL. It provides a new way to achieve high sensitivity, precision, and trace detection of cashmere/wool, and would be a valuable application for the cashmere industry.
研究领域:
材料科学
·
纺织工程
·
传感技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICS LETTERS
·
2023
·Vol. 48
·期 2
·440-443
·
IF 3.6
Jiayue Liu,Tianrui Zhang,Zhiyu Tan,Jierong Cheng,Shengjiang Chang,Shengjiang Chang,Fei Fan,Fei Fan
The highly sensitive detection and identification of chiral biochemical substances have attracted extensive attention. Terahertz (THz) spectroscopy and sensing technology have obvious advantages in non-contact and label-free biochemical detection, but the THz chiral spectral response of chiral biochemical substances is too weak to realize highly sensitive chiral enantiomer recognition. Herein, we propose a method of spin beam deflection and separation by using a Pancharatnam–Berry (PB) metasurface to enhance the THz chirality response of chiral amino acids, realizing the identification of chiral enantiomers of the same kind of amino acid. The conjugate spin transmittances and circular dichroism (CD) spectra of d- and l-tyrosine samples on the PB metasurface were measured by an angle-resolved THz time-domain polarization spectroscopy system, and their CD values reached 16.4° and −11.6° at a deflection angle of ±33°, respectively, which were enhanced by about 9.3 and 11.9 times compared with the maximum CD values of the sample without the metasurface. Therefore, this THz chiral sensing method based on a PB metasurface has great potential in highly sensitive chirality identification and enhancement for chiral substances.
研究领域:
生物化学
·
光学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
iScience
·
2022
·
IF 6.107
Ruisi Wang,Shanshan He,Shizhen Chen,Weixing Shu,Shuangchun Wen,Hailu Luo
Computing metasurfaces have shown the extraordinary ability to precisely perform optical analog operations to the input light wave, and therefore exhibit greater potentials toward sensing applications. Here, we propose a unique application of computing metasurface for chiral edge sensing by incorporating a weak-value amplification technique. The computing metasurface performs the spatial differentiation operations of phase objects and extracts the edge-enhanced images, because the phase gradient generally occurs at the edge. The chirality-induced polarization rotation acts as the preselection state and the spatial differentiation operations in the metasurface provide weak coupling. The amplified pointer shift related to the tiny polarization rotation will eventually lead to an asymmetric edge-enhanced image. Owing to the high sensitivity of the weak-value amplification, we experimentally demonstrate a high-contrast recognition of chirality by edge detection, which may have potential applications in real-time measurement and separation of chiral enantiomers.
研究领域:
光学
·
传感技术
·
材料科学
✓ 已验证
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Mingfu Zhao,Feng Chen,Bin Zhang,Hong Liu,Zeying Li,Gengchen Li,Minggang Zhao,Ye Ma
Microplastics (MPs) are widely distributed in water, soil, and air, drawing a global concern as a cause of chronic diseases and immune system disruption. Though as one of the most promising techniques in MP detection, the surface-enhanced Raman scattering (SERS) is heavily dependent on the distribution of the “hot spots” and the size of MPs, known as “coffee ring effect” and “size effect” respectively, imposing major challenges in the quantitative detection of various sized MPs on conventional SERS substrates. Here we present a self-healing metasurface based on plasmonic nanoparticle (NP) array at the liquid-liquid interface (LLI) and air-liquid interface (ALI). The fluidic nature of the metasurface and the repulsive forces between NPs offer atomic-level flatness and uniform distribution for “hot spots”. Additionally, MPs are dissolved in the oil phase, uniformly enriched in the form of polymer molecular chains on the liquid metasurface, irrespective of the size of the MPs. This molecular dispersity of the dissolved MPs enhances the overlap between the “hot spots” and scattering volume of MPs, significantly improving the intensity and reproducibility of SERS. The sensing platform is successfully applied in trace detections of various MPs (PS, PET, PMMA, and PC), and validated in real samples.
研究领域:
环境科学
·
分析化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 36
·1801127
·
IF 13.325
Hanchuan Tang,Zhesi Chen,Ni Tang,Shuaifeng Li,Yaxi Shen,Yugui Peng,Xuefeng Zhu,Jianfeng Zang
Acoustic metasurfaces that can manipulate and control sound waves at 2D subwavelength scales open new avenues to unusual applications, such as asymmetric transmission, super-resolution imaging, and particle manipulation. However, the long-standing goals of pushing frontier metamaterials research into real practice are still severely constrained by cumbersome configuration, large acoustic loss, and rigid structure of the existing metamaterials. An ultrathin metasurface (10–300 µm in thickness, up to ≈λ/650, λ the wavelength) that is capable of imparting sound wave with a nontrivial phase shift with high transmittance (>80%) in the range of 5–30 kHz is fabricated here. The metasurface is comprised of a porous network of soft polymer fiber/rigid beads that are physically equivalent to crosslinked spring-mass resonators. Moreover, the traditional paper-cutting art to carve the ultrathin metasurface into hollow-out patterns is incorporated, resulting in a variety of remarkable functions, including acoustic vortex, focusing, and super-resolution. The hollow-out patterning approach innovates the traditional one-step metadevice fabrication process into two separated steps: 1) fabrication of ultrathin metasurfaces; 2) hollow-out patterning of metasurfaces. The strategy opens an avenue to mass production of acoustic metadevices, shedding light on the applications of the metamaterials in acoustic cloaking, acoustic positioning, and particle manipulation.
研究领域:
材料科学
·
声学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2024
·
IF 5.8
Mengjia Cen,Jiawei Wang,Ming Cheng,Ziyan Lei,Ye Li,Zhenming Wang,Xueqian Zhao,Zixuan Wu,Huanian Zhang,Yan Jun Liu
Manipulating circular dichroism in chiral metasurfaces has been increasingly important for a wide range of polarization-sensitive photonic applications. However, simple methods for presenting chiral nanostructures with tunable and considerable chiroptical responses in the near-infrared-I regime remains underexplored. Herein, two sheets of suspended symmetric bilayer metagratings fabricated via single-step electron beam lithography are stacked into a moiré metasurface with its circular dichroism value reaching up to 20.9°. The chirality of the moiré metasurface can be fully tuned in terms of both its sign and magnitude by adjusting the in-plane angle between the two twisted sheets of metagratings. The multilayered design is accessible to the coupling of hybridized plasmons for governing the chiroptical properties in the near-infrared-I regime. The ratio between the resonance wavelength and the grating period is about 1.65, which is much lower compared to that in most existing moiré metasurfaces with strong chiroptical responses. Furthermore, the superchiral fields in the inter-sheet region are further exploited for label-free enantiodiscrimination with ultrahigh sensitivity of 10.17 nm fmol−1 mm2. The proposed moiré metasurfaces with strong near-infrared-I chirality hold great potential for supporting polarization engineering and biomolecular detection, paving a way for advanced applications in medical diagnosis, biomedical imaging, and display technologies.
研究领域:
纳米光子学
·
生物医学检测
·
光学工程
✓ 已验证
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 33
·期 6
·065302
·
IF 3.874
Wanyi Li,Xianzhi Zeng,Yajing Dong,Ziwei Feng,Hongjing Wen,Qin Chen,Long Wen,Shichao Song,Xiangping Li,Yaoyu Cao
Recent demonstrations of metasurfaces present their great potential to implement flat and multifunctional optical elements, which are accomplished with the designs of planar optics and micro-/nano- fabrications. Integrating metasurfaces in three dimensions has manifested drastically increasing advantages in manipulating light fields by extending design freedom. However, fabricating three-dimensional metasurfaces remain a tough challenge due to the lack of stereo printing protocols. Herein, we demonstrate laser nanoprinting of floated silver nanoparticle array in transparent hydrogel films for 3D metasurface to achieve color patterning. It is found that spatially resolved nanoparticles can be produced through laser induced photoreduction of silver ions and robustly anchored to the gel backbones by a focused femtosecond laser beam within a pH-responsive smart hydrogel matrix. With the aid of expansion properties of the pH-responsive hydrogel, repetitive coloration of the patterned plasmonic nanoparticle array over a wide spectrum range is achieved via reversible regulation of nanoparticle spacing from 550 to 350 nm and vice versa. This approach allows broadband 3D color-regulation in nanoscale for applications in active spectral filtering, information encryption, security tagging and biological colorimetric sensing, etc.
研究领域:
光学工程
·
材料科学
·
生物传感
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 7
·1202
·
IF 5.719
Zhenming Wang,Jianxun Liu,Jiawei Wang,Zongjun Ma,Delai Kong,Shouzhen Jiang,Dan Luo,Yan Jun Liu
Surface-enhanced Raman spectroscopy (SERS) has long been an ultrasensitive technique for trace molecule detection. However, the development of a sensitive, stable, and reproducible SERS substrate is still a challenge for practical applications. Here, we demonstrate a cost-effective, centimeter-sized, and highly reproducible SERS substrate using the nanosphere lithography technique. It consists of a hexagonally packed Ag metasurface on a SiO2/Au/Si substrate. A seconds-lasting etching process of a self-assembled nanosphere mask manipulates the geometry of the deposited Ag metasurface on the SiO2/Au/Si substrate, which attains the wavelength matching between the optical absorbance of the Ag/SiO2/Au/Si substrate and the excitation laser wavelength as well as the enhancement of Raman signals. By spin-coating a thin layer of graphene oxide on the substrate, a SERS performance with 1.1 × 105analytical enhancement factor and a limit of detection of 10−9M for melamine is achieved. Experimental results reveal that our proposed strategy could provide a promising platform for SERS-based rapid trace detection in food safety control and environmental monitoring.Keywords:SERS;self-assembly;metasurface;surface plasmon;hot spot;sensitivity
研究领域:
分析化学
·
材料科学
·
食品安全
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）