JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
·
2024
·
IF 1.3
Yang Jiewen,Wang Song,Lin Xiaowen,Xu Changhua
A direct, high-throughput and accurate method, multi-molecular infrared spectroscopic (MMIR) data fusion, was established for the detection of trace of estrone, diethylstilbestrol, betamethasone and prednisone acetate in peptide powders based on near-infrared and mid-infrared fusion datasets. Tri step MMIR with progressively improved resolution captured key fingerprint features of hormones in the regions of 3430-3250, 2950-2850, 1750-1550 and 1335-1050 cm-1 which were exclusively selected as the datasets. The back propagation neural network (BPNN) model with the best performance used a mid-level fusion strategy and achieved excellent root mean square error of prediction (RMSEP, 1.101 mg kg-1) and residual prediction deviation (RPD, 9.890). Compared to those of single dataset models, the RMSEP was reduced by more than 82.03%. This method had remarkable practical significance for the direct and accurate quality evaluation of peptide powder products with favorable limit of detection (LOD) but without pretreatment and chemical agents, verifying the feasibility of multiple analytical instruments for rapid and comprehensive detection of powdered foods.
研究领域:
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2020
·
IF 3.085
Haining Ji,Dongqing Liu,Haifeng Cheng
Vanadium dioxide (VO 2 ) is a remarkable thermochromic material for application in adaptive infrared camouflage due to the reversible phase transition that is coupled with an abrupt change in infrared optical properties . However, the relatively high phase transition temperature and the unclear infrared optical modulation characteristics in the mid-infrared and far-infrared regions largely restrict its practical applications. Here, W-doped VO 2 nanoparticles were successfully prepared to reduce the transition temperature. When the effective doping amount of W was 1.70%, the transition temperature decreased to 43.2 °C. Importantly, the infrared properties of W-doped VO 2 nanoparticles were studied in both MWIR (3–5 μm) and LWIR (8–14 μm) thermal atmospheric windows, for the first time, which exhibited significant infrared optical changes, with emissivity variation of Δε = 0.17 and Δε = 0.28, respectively. These favorable results further promote the development of the adaptive camouflage.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2020
·
IF 9.567
Leqi Yao,Qiyue Shao,Shouyu Han,Chao Liang,Jinhua He,Jianqing Jiang
Near-infrared (NIR) phosphors have received increasing attention for designing novel solid-state light sources with broadband NIR output. In this work, a novel NIR phosphor LiScP2O7:Cr3+ (LSP:Cr3+) is developed with the emissions (750–1100 nm) completely in the NIR spectral range. Under 470 nm excitation, LSP:0.06Cr3+ shows broadband NIR emissions peaking at ∼880 nm, with a full width at half maximum (FWHM) of ∼170 nm and an internal quantum yield (IQY) of ∼38%. Moreover, photoluminescence (PL) improvements of LSP:Cr3+ phosphors are achieved by Yb3+ codoping, leading to the broadened FWHM (up to ∼210 nm), increased IQY (ηmax = ∼74%), and reduced thermal quenching. The energy transformation processes in LSP:Cr3+,Yb3+ are quantitatively analyzed on the basis of PL lifetime and QY measurements, revealing that the PL improvements by Yb3+ codoping principally originate from the energy transfer from Cr3+ to more efficient and thermally stable Yb3+ emitters. Finally, NIR phosphor-converted light-emitting diodes (pc-LEDs) are fabricated by combining LSP:Cr3+,Yb3+ phosphors with blue LED chips, giving a maximum NIR output power of ∼36 mW and photoelectric efficiency of ∼12% at 100 mA drive current. The results suggest that the investigated phosphors would be promising luminescent converters for broadband NIR pc-LED applications.
研究领域:
材料科学
·
光电技术
·
光子学
·
固态照明
✓ 已验证
DOI
高影响因子
Advanced Physics Research
·
2022
·Vol. 2
·期 4
·2200056
·
IF 0
Kuangnan Lyu,Gaochao Liu,Maxim S. Molokeev,Zhiguo Xia
Near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) are desired for optoelectronic and biomedical applications, while the development of target broadband NIR phosphors still remains a significant challenge. Herein, a kind of Cr 3+ -doped AlNbO 4 phosphors with a broad NIR emission ranging from 650 to 1400 nm under 450 nm excitation are reported. A giant red-shift emission peak from 866 to 1020 nm together with broadened full width at half-maximum of 320 nm is achieved simply by varying the doped Cr 3+ concentrations. Structural and spectroscopy analysis demonstrate that a concentration-dependent site-occupation of Cr 3+ emitters in different Al 3+ sites is responsible for the tunable NIR luminescence. The as-fabricated NIR pc-LED based on optimized AlNbO 4 :Cr 3+ phosphor exhibits great potential in night-vision applications. This work provides a novel design principle on the Cr 3+ -doped AlNbO 4 phosphor with tunable broadband luminescence from NIR-I to NIR-II, and these materials can be employed in NIR spectroscopy applications.
研究领域:
光学材料
·
生物医学光学
·
光电子学
·
无机功能材料
·
分子影像
✓ 已验证
DOI
BIORESOURCE TECHNOLOGY
·
2019
·
IF 6.669
Yuan Zhang,Liping Kang,Hongmei Li,Xianzhang Huang,Xiaoyu Liu,Lanping Guo,Luqi Huang
The combustion of moxa floss was investigated by thermogravimetric/differential scanning calorimeter (TG/DSC), thermogravimetric/Fourier transform infrared spectroscopy (TG-FTIR) and an infrared radiation spectrum-detecting system. The average mass loss rate at the major stage of combustion was 1.08%/min with a peak at 7.86%/min. Moxa floss burning released the integral heat of 9188 mJ/mg from the temperature of 200 °C to 500 °C. The peak heat flow during char combustion stage was higher than those of other stages. The results indicated the combustion of moxa floss was a mild and slow process, releasing heat continuously and steadily. The infrared radiation spectra of burning moxa stick were in a range of 2.5–13.0 µm and showed double peaks at 3.75 µm and 8.75 µm. Thus, this study provided insight into why moxa floss biomass is the optimal material for thermal therapy and is beneficial for the development of electric thermal stimulation alternative.
研究领域:
热疗研究
·
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 9
·2853-2862
·
IF 4
Zurong Liao,Chaojie Li,Jiyou Zhong,Yang Li,Weiren Zhao
A broadband near-infrared (NIR) light source based on a phosphor-converted light-emitting diode (pc-LED) has attracted increasing interest to be used in non-destructive examination, security-monitoring and medical diagnosis fields, which stimulates the exploration of NIR phosphors with high performance. Herein, a series of Cr3+-activated garnet Ln3ScInGa3O12:Cr3+ (Ln = La, Gd, Y, and Lu) phosphors were reported, allowing an emission peak ranging from 726 to 822 nm. Among them, Y3ScInGa3O12:Cr3+ with an optimized Cr3+-doping concentration of 6 mol% exhibits a high internal quantum efficiency (IQE = 83.1%) and excellent absorption efficiency (AE = 44.2%) under 450 nm blue light excitation, enabling an external quantum efficiency as high as 36.7%. Moreover, this material can maintain 93.0% of the initial intensity when heated up to 423 K, implying outstanding thermal stability. Finally, a prototype NIR pc-LED device was fabricated by coating the optimized phosphor on a 455 nm LED chip, which generates a broadband NIR emission with a peak located at 765 nm and a full width at half maximum of 127 nm. The NIR output power and NIR photoelectric conversion efficiency of this device were found to be 38.01 mW and 11.0%, respectively, under 100 mA driving current, demonstrating the feasibility of this material to be applied in NIR pc-LEDs.
研究领域:
材料科学
·
光电技术
·
光子学
✓ 已验证
DOI
高影响因子
SOLAR ENERGY
·
2021
·
IF 5.742
Yueying Li,Yan Ma,Wenyuan liu,Zhoufu Wang,Hao Liu,Xitang Wang,Hengyong Wei,Shenghao Zeng,Nian Yi,Gary J. Cheng
The colored non-toxic near-infrared (NIR) reflective and infrared radiative pigments are desired in reducing the energy consumption of buildings. In this work, yttrium ferrite (YFeO 3 ) pigments with controllable crystalline structure were successfully synthesized via the method of solid-state reaction at low-heating temperature. The effects of the crystalline structure and microstructure, especially charge state distribution, on the bandgap, chromatic properties, infrared reflection and radiation performance of YFeO 3 pigments were investigated for the first time. With the calcining temperature increased, the structure of obtained pigments changed from hexagonal to orthorhombic, and the bandgap was obviously widened. The black hexagonal YFeO 3 pigments possessed small particle size, and their intensive optical absorption in the NIR range was related to the noticeable multiple reflections induced by the grain boundary. While, the brown orthorhombic YFeO 3 powdered pigments, as well as the corresponding pigmented coatings, possessed good NIR reflection characteristics, and the high solar reflectance values clearly highlight the potential of these pigments as cool pigments. In addition, the obtained YFeO 3 pigmented coatings showed high emissivity in 8–14 μm waveband (atmospheric window), indicating their potential applications in energy saving of buildings by combining NIR shielding and space cooling. The larger amount of Fe 2+ -Fe 3+ ions pairs in the orthorhombic pigments led to the enhancement of free carrier absorption, which enhanced infrared emission and contributed to the slightly decreased NIR reflectance.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
PHYTOCHEMICAL ANALYSIS
·
2020
·Vol. 31
·期 3
·366-374
·
IF 2.772
Jing-Wen Hao,Yue Chen,Nai-Dong Chen
In this study, the potentiality of applying attenuated total reflectance near-infrared (ATR-NIR) and attenuated total reflectance mid-infrared (ATR-MIR) techniques combined with a partial least squares (PLS) regression technology to quantify the total polyphenols (TPs) in Dendrobium huoshanense (DHS) was investigated and compared. The real TP contents in the DHS samples were analysed using methods of reference. The capability of the two IR spectroscopic techniques to quantify the TPs in DHS was assessed by the root-mean-square error of calibration (RMSEC) and determination coefficients ( R 2 ). The results showed that both NIR and MIR might be used as a fast and simple tool to replace traditional chemical assays for the determination of the TP contents in DHS, and the best NIR model showed slightly better prediction performance [root-mean-square error of prediction (RMSEP): 0.307, R 2 : 0.9122, ratio performance deviation (RPD): 4.43] than the best MIR model (RMSEP: 0.440, R 2 : 0.9069, RPD: 3.09). Results from this study indicated that both the NIR and MIR models could be used to quantify the TP in DHS, and ATR-NIR appeared to be the more predominant and more robust technique for the quantification of the TP in DHS.
研究领域:
植物化学
·
分析化学
·
药用植物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2023
·Vol. 25
·期 22
·15452-15462
·
IF 3.3
Zurong Liao,Jiyou Zhong,Chaojie Li,Huan Jiang,Weiren Zhao
Broadband near-infrared (NIR) spectroscopy generated from a phosphor-converted light-emitting diode (pc-LED) has multifunctional applications, including food-quality analysis, bio-medical and night-vision, stimulating the demand for developing various NIR phosphors with desired properties. Herein, we selected a highly distorted garnet Ca4HfGe3O12 as the host and explored the near-infrared luminescence of Cr3+. As expected, this material achieved a long-wavelength NIR emission and excellent absorption efficiency based on the effect of Jahn–Teller distortion. The synthesized Ca4HfGe3O12:Cr3+ phosphor exhibits a broadband NIR emission peaking at 840 nm with a full width at half maximum of 150 nm, and the absorption efficiency reaches 48.0%. However, the internal quantum efficiency of the 6 mol% Cr3+-doped sample was measured to be only 35.3% and the integral emission intensity at 373 K kept only 60.1% of the initial intensity. The possible reasons for the unsatisfactory internal quantum efficiency and thermal stability were systematically analyzed, which provided a comprehensive understanding of the relationship between the crystal structure and the luminescent properties of Cr3+-activated garnet-type phosphors. Nevertheless, the as-prepared NIR pc-LED device exhibits a NIR output of 16.52 mW with a NIR photoelectric conversion efficiency of 5.92% driven by 100 mA current, indicating the potential of this material for application in NIR pc-LED.
研究领域:
材料科学
·
光学
·
光子学
·
固体物理
✓ 已验证
DOI
高影响因子
ACTA MATERIALIA
·
2021
·
IF 8.203
Enbo Li,Wen Ma,Peng Zhang,Chennan Zhang,Yu Bai,Hongxia Liu,Shufang Yan,Hongying Dong,Xiangfeng Meng
A series of Al 3+ -doped SrZrO 3 perovskite powders with low infrared emissivity were prepared. The doping-effect of Al 3+ on infrared radiation ability and thermophysical properties was investigated in detail by theoretical and experimental methods. As a result, Al 3+ -doped SrZrO 3 perovskite's infrared emissivity is related to its electronic structure and particle morphology . It can be adjusted by the Al 3+ -doped concentration. The SrZr 0.86 Al 0.14 O 2.935 powder with stronger electronic conductivity and flake particles has the lowest infrared emissivity with 0.256 in 3-5 μm waveband at 590 °C and 0.383 in 8-14 μm waveband at 550 °C. Al 3+ -doped SrZrO 3 perovskites still maintain ideal thermal stability and low thermal conductivity above 800 °C. Base on both low infrared emissivity and thermal conductivity, Al 3+ -doped SrZrO 3 tablets exhibited weaker thermal radiation intensity in the high-temperature condition and might be the potential low thermal infrared materials servicing under extreme temperature in the future.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 48
·18234-18240
·
IF 8.067
Chuan-Jun Tang,Bo-Mei Liu,Lin Huang,Jing Wang,Qiang Tang
The rapid development of minimized near-infrared (NIR) phosphor-converted LEDs (pc-LEDs) has evoked a large demand for broadband NIR phosphors and will enable breakthrough NIR spectroscopy applications. Consequently, the search for NIR pc-LEDs which can emit in the NIR-II window (1000–1700 nm) has become increasingly urgent. Herein, an unprecedented long-wavelength NIR MgTi2O5:Ni2+ phosphor that exhibits broadband NIR emission covering 1200 to 1700 nm with a full width at half maximum (FWHM) of 245 nm is successfully synthesized. By combining the MgTi2O5:Ni2+ phosphor with an ultraviolet LED chip, a high-performance NIR pc-LED is fabricated, which has a NIR output power of 3.6 mW at 300 mA driving current. These results indicate that the fabricated NIR-II pc-LED device is a promising candidate as a broadband light source for NIR spectroscopy applications including night vision, high-penetrating imaging, and information restoration. For instance, the secret information covered by ink can be recovered with the aid of an NIR-II pc-LED. This work not only provides a new material that has great potential as a NIR light source, but also demonstrates a set of approaches to expand the application of NIR spectroscopy and imaging technology.
研究领域:
材料科学
·
光学工程
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
Light-Science & Applications
·
2025
·Vol. 14
·期 1
·1-10
·
IF 23.4
Mu Ge,Lin Yangye,Fu Kerui,Tang Xin
Biological visions have inspired the development of artificial vision systems with diverse visual functional traits, however, the detected wavelength is only in visible light between 0.4 and 0.78 μm, restricting their applications. Snakes generate a thermal image of animals due to pit organs for detecting and converting infrared, allowing them to accurately target predators or prey even under darkness. Inspired by natural infrared visualized snakes, we propose artificial vision systems with CMOS sensors-integrated upconverters to break visible light limitations to realize 3840 × 2160 ultra-high-resolution short-wave infrared (SWIR) and mid-wave infrared (MWIR) visualization imaging for the first time. Through colloidal quantum dot barrier heterojunction architecture design of infrared detecting units and the introduction of co-hosted emitting units, the luminance and upconversion efficiency reach up to 6388.09 cd m −2 and 6.41% for SWIR, 1311.64 cd m −2 and 4.06% for MWIR at room temperature. Our artificial vision systems broaden a wide spectrum of applications within infrared, such as night vision, agricultural science, and industry inspection, marking a significant advance in bioartificial vision.
研究领域:
生物启发
·
光电子学
·
红外成像
·
传感器技术
·
人工智能
·
材料科学
·
纳米结构
✓ 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）