ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 32
·2202661
·
IF 19.924
Xin Tao,Dongqing Liu,Tianwen Liu,Zhen Meng,Jinshan Yu,Haifeng Cheng
Reversible silver electrodeposition (RSE) can dynamically modulate visible light and infrared radiation through the reversible electrodeposition and dissolution of silver layer. However, the RSE device with bistability better than 2 h has not been reported, because the deposited silver layer may dissolve automatically without driving voltage. Here, a variable infrared emissivity device based on RSE with 24 h excellent bistability is demonstrated. A silver layer fixed at the counter electrode is used as the charge mediator, which reforms the electrochemical reactions of the counter electrode and is the key for obtaining bistability. Effects of electrolyte composition and driving voltage on the bistability are studied, and the driving voltage affects the bistability of RSE devices. This RSE device can be enlarged to 5 × 5 cm 2 with uniform emissivity change of 0.48 in 2.5–25 µm using silicon wafer as the infrared transparent working electrode substrate, and display discontinuous thermal patterns through incorporating a dielectric pattern layer. The cyclability and device failure mechanism is analyzed. With the excellent bistability, the proposed RSE devices provide great application prospects in the fields of dynamic infrared information display, adaptive infrared camouflage, and smart thermal management.
研究领域:
材料科学
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光学工程
·
热管理技术
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Liu Ningna,Kun Liu,Cui Jingxuan,Feng Aihu,Yun Yu
Functional-group coordination and lamellar structure determine the stability of MXene. • Strong Ti-S bonding passivates active Ti sites and suppresses oxidation. • Functional-group synergy induces ordered and compact MXene lamellae. • Infrared emissivity remains 0.18 after three humid-heat cycles. MXene exhibits intrinsically low infrared (IR) emissivity, making it a promising candidate for IR stealth applications. However, its pronounced oxidation susceptibility constrains long-term stability. Herein, serine (Ser) and glutathione (GSH) were employed to elucidate how functional-group modification regulates active-site passivation and structural densification in MXene films. The coordination affinity of functional groups toward reactive Ti sites plays a key role in environmental stability, with thiol (−SH) moieties preferentially forming strong coordination bonds to passivate active sites, thereby suppressing oxidative degradation. Simultaneously, the synergistic interplay of multiple functional groups promotes nanosheet alignment and structural compaction, effectively hindering oxygen and water penetration. Benefiting from the synergistic effects of active-site passivation and structural densification, the modified MXene film retains low IR emissivity (∼0.18) after three consecutive 24 h humid-heat aging cycles, whereas the emissivity of pristine MXene increases to ∼ 0.34 under the same conditions. This study presents a rational design framework for durable, low-emissivity MXene materials. Download: Download high-res image (199KB) Download: Download full-size image
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 42
·2507409
·
IF 19
Yilin Wang,Guowei Tang,Xuexue Xiang,Mulin Qin,Yu Qiu,Jian-Cheng Lai,Yucan Peng
Low-emissivity materials are regarded as promising candidates for thermal insulation. However, aesthetic concerns often hinder their practical application, primarily due to metallic gray coloration. While some colorful low-emissivity paints have been developed to address this issue, the labor application costs and complex preparation processes remain significant drawbacks. Here, a new category of self-stratifying colorful low-emissivity paints (SSCLPs) is presented, engineered to spontaneously form a distinct bilayer structure with a single application, thus eliminating the need for a second coat. Through careful formulation, the resulting bilayer coating features a highly reflective bottom layer and an infrared (IR)-transparent colored top layer, demonstrating low mid-infrared emissivity (as low as 0.107), high near-infrared reflectance (up to 0.814), and selectively visible reflectance for desired colors. Simulations confirm that effective stratification is essential for achieving the desired optical properties. Thermal insulation experiments demonstrate that SSCLPs can efficiently resist radiative heat transfer. Furthermore, building energy simulations indicate that SSCLP application to a two-story office building can yield annual heating, ventilation and air conditioning (HVAC) savings of up to 13.38 MJ m − 2 , with an associated CO 2 emission reduction of 1.1 kg m − 2 . This study contributes to advancing thermal insulation materials that promote energy savings and sustainability objectives.
研究领域:
材料科学
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能源效率
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建筑技术
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隔热材料
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可持续材料
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Ruiqi Yu,Mengyao Wang,Weifang Lu,Jingshi Wang,Yanxia Cao,Yanyu Yang,Wanjie Wang,Jianfeng Wang
Infrared ultralow-emissivity fabric has garnered significant interest for applications in infrared stealth and personal thermal management. However, reconciling the competing demands of low emissivity, breathability, and mechanical strength poses a formidable challenge. Here, an air-permeable polymeric metafabric distinguished by a unique non-through-hole structure is presented. This design is achieved through the electroless plating of silver nanoparticles onto commercially available nylon fabric, supplemented by an intermediate layer of hot-processed nylon porous mesh. This metafabric demonstrates an ultralow emissivity of 0.044, an exceptional electrical conductivity of 51 315 S m −1 , an impressive electromagnetic interference shielding efficiency of 78 dB, and a high tensile strength of 110 MPa. The emissivity, conductivity, and strength of the metafabric are among the highest values reported for infrared low-emissivity fabrics. The metafabric also exhibits an air permeability that conforms to Grade 2 of international standards. The metafabric facilitates personal precision heating across diverse environments through its integrated capabilities of passive radiative and active solar/Joule heating. Additionally, the metafabric displays antibacterial properties, flame retardancy, sweat absorption, quick-drying, and washability performance, thereby significantly enhancing its wearability. This high-performance, multifunctional, infrared ultralow-emissivity polymeric metafabric holds great promise for applications in infrared camouflage, electromagnetic protection, and personal thermal management.
研究领域:
材料科学
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纺织工程
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热能工程
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 1
·49622
·
IF 2.52
Feifei Lu,Peiyu Tan,Yuge Han
Polyaniline (PANI) films and its electrochromic devices based on various porous substrates were obtained by electrochemical deposition. The pore size distribution of the porous substrate has shown important influence on the infrared emissivity variation (∆ ε ) of the device. Morphology and structure of PANI were characterized by scan electronic microscopy (SEM) images and Fourier transform infrared spectra (FTIR). SEM images present the morphology difference of PANI on different substrates, which suggest that large pores will prevent PANI particles from forming orderly and compactly films. FTIR spectrum indicates that pore size of substrates affects the orientation of PANI chains. Furthermore, electrochemical properties and stability of PANI films were analyzed by cyclic voltammetry (CV) curves. And the CV curve revealed that the generation of irreversible degradation products is the reason for poor stability of PANI films. Finally, greatly improved ∆ ε of 0.559 in 3–5 μm waveband and 0.39 in 8–14 μm waveband is achieved by choosing a small pore substrate.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 28
·期 12
·8601-8610
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IF 2.019
Pan Wenlu,He Man,Bu Xiaohai,Zhou Yuming,Ding Binbin,Huang Tingyuan,Huang Shuang,Li Shiwei
Hybrids of polyacetylene (PA) with multiwalled carbon nanotubes (MWNTs) were fabricated by wrapping PA derivatives containing stigmasterol and pivalic acid moieties onto MWNTs walls. The PA derivatives with moderate molecular weights (M n ~ 24409) were proved to adopt a single-handed helical structure stabilized by asymmetric hydrogen bonding force and stereo-hindrance effect. Convincing experimental results show that PA had been wrapped evenly on the surface of MWNTs without damaging their internal structures. Moreover, the helical structure of PA became more compact and ordered after wrapping around MWNTs. The incorporation of stigmasterol moieties could contribute to enhancing the microwave absorbing properties and decreasing infrared emissivities. PA@MWNTs showed a minimum reflection loss value of −20.65 dB at 9.7 GHz and the bandwidth of reflection loss less than −10 dB (90% absorption) was 3.2 GHz. Meanwhile, PA@MWNTs composites had a much lower infrared emissivity value (ε = 0.503) than raw MWNTs. The efficient microwave absorption and low infrared emissivity might result from the synergistic effect of the extraordinary helical structure of PA and π-electronic interactions between the organic substituents and inorganic MWNTs walls, which provides a promising method to prepare materials with low infrared emissivities and excellent microwave absorption properties.
研究领域:
材料科学
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化学
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 28
·2201906
·
IF 19.924
Wei Wu,Liping Tong,Han Zhou,Tongxiang Fan
Low infrared emissivity materials play a key role in thermal camouflage or retardation. Among these, fillers can be easily shaped into various flexible forms and normally provide an omnidirectional and polarization-insensitive emissivity. However, conventional fillers suffer from drawbacks of full-waveband ultrahigh reflectivity, unsatisfactory thermal camouflage performances, or poor chemical/thermal stabilities. Herein, 2D MoSe 2 is discovered as a new semiconductor with intrinsic low infrared emissivity after first-principle density functional theory calculation and experimental demonstration on eight types of two-dimensional materials (2DMs). Mechanisms of electron–photon reflection and phonon–photon absorption for the low infrared emissivity are proposed. A two-step microwave-assisted amination process is developed to exfoliate the nanosheets and obtain a desired low infrared emissivity. The as-obtained chitosan modified MoSe 2 (CS@MoSe 2 ) has an ultrahigh spectral reflectivity of 78%–86% in 8–14 µm, and its resin-based coating still exhibits a low infrared emissivity of 0.32 and shows a dramatic reduction in radiation temperature of 28 °C for a hot object at 70 °C. Besides, CS@MoSe 2 can endure a high temperature of 220 °C and is demonstrated with a long-term thermal camouflage efficiency in hot environments. This work will guide 2DMs selection and preparation toward desired infrared radiation properties to satisfy numerous applications.
研究领域:
材料科学
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纳米技术
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热力学
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表面化学
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DOI
高影响因子
Advanced Science
·
2025
·
IF 14.1
Runyun He,Tianwen Liu,Liqiang Zhang,Tuoyu Liu,Dan Tang,Wenxia Zhang,Jundong Tao,Tingting Shi,Yijing Song,Haifeng Cheng,Yao Zhang,Dongqing Liu
Variable emissivity devices enable dynamic infrared emissivity modulation for thermal camouflage, energy-efficient architecture, spacecraft thermal control, and wearable thermoregulators. While reversible metal electrodeposition allows remarkable spectral modulation via controlled metal deposition/dissolution, electrode degradation-induced cycling instability hinders practical application. Ultra-thin Ir-based electrode strategy is developed to enhance durability of reversible copper electrodeposition variable-emissivity device. The Ir-electrode-enabled devices exhibit merely 11% degradation in radiative temperature variation after 8000 cycles and 23% attenuation in emissivity modulation after 6000 cycles, substantially outperforming Pt-based counterparts (54% attenuation after 5000 cycles). This stability stems from Ir's inherent chemical inertness, superior conductivity, and mechanical robustness, which collectively suppress stress-induced cracking, electrolyte corrosion, and electrochemical oxidation. Ir-Au grid composite electrode ensures homogeneous deposition/dissolution, maintaining performance in large-area rigid and flexible devices (>3000 cycles on 10 × 10 cm 2 rigid Si, >1000 cycles on 8 × 8 cm 2 flexible polyamide). Integration of Cr 2 O 3 optical interference layer with Ir electrode on BaF 2 enables dual-band modulation (visible coloration and 3–14 µm infrared wavelength, emissivity modulation range Δε = 0.56) with stability exceeding 10 000 cycles. The Ir-based electrode engineering exhibits enhanced stability, scalable manufacturability, compliant substrate integration, and color-compatible operation, providing pivotal implications for thermal regulation systems, IR stealth applications, and advanced display technology.
研究领域:
材料科学
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电化学
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光学器件
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热管理
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智能涂层
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2014
·Vol. 49
·期 20
·6944-6951
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IF 2.305
Wang Yongjuan,Zhou Yuming,Zhang Tao,He Man,Bu Xiaohai
The biomolecule–inorganic hybrid materials are potential candidates for low infrared emissivity materials due to the combined functionalities of the biomolecules and the inorganic components. In this study, we describe a facile approach to fabricate DNA/layered double hydroxides (LDHs) nanohybrid by coassembly of exfoliated Ni–In LDHs nanosheets with DNA. In the assembly progress, exfoliated LDHs nanosheets and DNA with different initial DNA/LDHs mass ratio were mixed together, and the DNA intercalated LDHs nanohybrid was obtained only when the input DNA/LDHs mass ratio is ≤0.3 mg/mg. The structure and morphology of as-fabricated hybrid materials were characterized by X-ray diffraction (XRD), UV–Vis absorption spectra, Fourier transform infrared (FT-IR) spectra, thermogravimetry (TG), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results indicate that the reassembled product has layered structures incorporated with DNA biomolecule. The nanohybrid with expanding LDHs structure of d
003 = 2.6 nm confirms the intercalation of DNA molecules into the LDHs interlayer. The helix chain oriented parallel to the basal plane of host layer forming ordered sandwich structure. The infrared emissivity value of the DNA/LDHs nanohybrid was then investigated. It was found that the infrared emissivity values were significantly reduced by coassembly of exfoliated LDHs nanosheets with DNA, which may be attributed to the synergistic effect and interfacial interaction between the DNA biomolecule and inorganic LDHs layers reinforced by the construction of ordered sandwich structure.
研究领域:
材料科学
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生物化学
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DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 9
·7439-7447
·
IF 3.289
Muyang Zhang,Yuming Zhou,Man He,Tao Zhang,Xiaohai Bu
A helical polysilane/multi walled carbon nanotubes composite was fabricated by wrapping helical HPS copolymer around the surface of modified nanotubes through surface oxidation. HPS was pre-polymerized by Wurtz-type coupling reaction in chloroform (CHCl3), demonstrating optical activity and adoption of a predominately signal-handed helical conformation. Various kinds of characterization including Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), transmission electron microscopy (TEM), ultraviolet-visible spectroscopy (UV-vis), thermogravimetric analysis (TGA), circular dichroism (CD) and Raman spectroscopy have been utilized to demonstrate HPS noncovalently wrapped around the nanotubes to protect their original graphite structure. The wrapped HPS exhibited enhanced thermal stability and increased optical activity after wrapping. The infrared emissivity property of the composites at 8–14 μm was investigated as well. These results indicate the HPS/f-MWNTs composites possess a much lower infrared emissivity value (ε = 0.576) than raw MWNTs, which resulted from synergistic effect of the particular helical conformation of HPS and improved interfacial interaction between the organic polymers and inorganic nanoparticles.
研究领域:
材料科学
·
化学
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DOI
高影响因子
APPLIED ENERGY
·
2026
·
IF 12.2
Zhenhui Hu,Yutong Tan,Kai Yao,Jiashuo Sun,Hengshan Wei,Yu Zhao,Xi Chen,Yi Long,Yongsheng Yang,Jinqing Peng,Yujie Ke
Thermochromic hydrogels have shown promise for smart windows but face challenges such as high thermal emissivity and rapid water loss. This paper reports a scalable hydrogel-based smart window that simultaneously addresses the key challenges of moisture retention, low long-wave infrared emissivity ( ɛ LWIR ), and large-area fabrication. The hydrogel is synthesized by copolymerizing the moisturizing agent sodium pyrrolidone carboxylate (PCA Na) with N-isopropylacrylamide (PNIPAM), forming a stable structure that lowers the phase transition temperature to 25.7 °C and improves water retention by 12% compared to the pure PNIPAM hydrogels. This hydrogel is further integrated with an indium tin oxide (ITO) layer for reduced ɛ LWIR . We produce a large-area smart window demo (40 × 45 cm 2 ), achieving a visible transmittance ( Т lum ) of 69.3%, a solar modulation (Δ Т sol ) of 60.3%, and a low ɛ LWIR of 0.32. To our knowledge, the demo featured with this performance and the water retention character is rarely achieved in previous reports. The demo test proves an indoor temperature reduction of up to 9.0 °C under daytime illumination compared with glass-based window. EnergyPlus simulations further indicate annual Heating, Ventilation, and Air Conditioning (HVAC) energy savings of 44.9%, 46.1%, and 10.1% in Bangkok, Pheonix, and Changsha, respectively, outperforming conventional glazing systems. The integrated design maintains excellent optical performance over 100 cycles and provides a scalable pathway toward practical, energy-efficient building applications.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·Vol. 45
·期 5
·117112
·
IF 5.8
Yaqian Du,Jianbo Li,Jun Wang
Compared with perovskite SrTiO 3 , SrO(SrTiO 3 ) 2 exhibits lower thermal conductivity , while maintaining a high Seebeck coefficient , making it a promising material for photothermoelectric conversion. However, the relationship between its infrared and thermoelectric properties remains unexplored. This study examines the effect of Gd doping on these properties of SrO(SrTiO 3 ) 2 . Increased Gd doping induces a gradual transformation of SrO(SrTiO 3 ) 2 -based into a SrTiO 3 -based material, resulting in a composite comprising three phases and a notable reduction in thermal conductivity . At 973 K, the thermal conductivity decreases to a minimum of 1.4 W m −1 K −1 , which is 23 % lower than undoped SrO(SrTiO 3 ) 2 and 51 % lower than SrTiO 3 . Like SrTiO 3 , SrO(SrTiO 3 ) 2 absorbs infrared radiation in the 8–14 μm range. Although the highest ZT value reaches only 0.06 at 973 K, it shows a positive correlation with infrared emissivity. These findings are valuable for advancing the application of thermoelectric effects and the development of high-performance infrared materials.
研究领域:
材料科学
·
凝聚态物理
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功能材料
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能源材料
·
红外光学
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DOI
高影响因子
危险品化学品经营许可证（带存储）