Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 10
·3504-3512
·
IF 6.4
Ming Yao,Ye Zhao,Xingping Zhou,Zhong’an Li,Haiyan Peng,Xiaolin Xie
Orthogonal integration of dual-mode optical images has become a hot topic in recent years due to the greatly increased information density, capacity and security. However, it remains challenging to improve the color diversity of the patterned images due to the stringent requirements of orthogonality during both image patterning and readout. Herein, we demonstrate a facile method to dial a fluorescent color when reconstructing dual images via Förster resonance energy transfer from liquid crystals (LCs) to a photocleavable AIEgen (e.g., TPE-Cou that comprises tetraphenylethylene and coumarin units). The energy transfer efficiency can be readily tuned from 0 to 99% by varying the TPE-Cou/LC weight ratio or controlling the photocleavage kinetics of TPE-Cou, making the fluorescent color readily tuned from blue-violet to yellow. Eventually, crosstalk-free integration of fluorescent and holographic dual-mode images has been successfully realized due to the orthogonality between the photocleavage reaction and holographic photopolymerization. Not only viewing-angle dependent structural color can be achieved owing to Bragg diffraction of the holographic patterns, but also multi-color fluorescent images can be encoded, which is highly promising for high security-level anticounterfeiting.
研究领域:
材料科学
·
光学工程
·
化学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULES
·
2025
·
IF 5.2
Zhikang Yang,Yuqun Du,Qingwen Li,Jingyu Zhang,Qiaoling Li,Hongxia Yan
Developing long-wavelength emissive nontraditional fluorescent polymers remains a big challenge. Herein, we synthesized four types of oligomers (HP1–HP4) that exhibit different fluorescence colors by introducing tertiary amines and C═C using a simple transesterification polycondensation method. Intriguingly, pure HP1 containing C═C and tertiary amines emits blue, yellow green, and yellow fluorescence under the irradiation of various excitation lights, showing color-tunable emission characteristics. Compared with HP3 with only C═C groups in its main chain, the optimal excitation/emission wavelength of HP1 in solution and pure states red-shifted to 520/550 and 525/554 nm, respectively. Experimental results and theoretical calculations revealed that the formation of efficient through-space n–n and n–π interactions leads to fluorescence. The presence of tertiary amines and C═C decreases the HOMO–LOMO gap of the oligomers and makes them easy to excite, which results in the red-shifted fluorescence. The prepared oligomers show excellent applications in information encryption and luminescent hydrogel preparation.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Photonics
·
2017
·
IF 6.756
Tanglue Feng,Qingsen Zeng,Siyu Lu,Xianju Yan,Junjun Liu,Songyuan Tao,Mingxi Yang,Bai Yang
In this paper, a unique strategy is proposed to modulate fluorescence color of carbon dots (CDs) under both aqueous solution and solid state for bright multicolor light-emitting diodes (LEDs) applications. We report facile synthesis of dual-peak-emissive CDs with self-quenching-resistant character under solid state through hydrothermal method, and investigate the origins of dual-peak emission for the first time. In addition, based on the unique dual-peak-emissive phenomenon, acid-mediated PL behaviors were realized by changing the pH value of hydrothermal precursors. We realized the color-tunable fluorescence under aqueous solution from blue (B-CDs) to yellow-green (YG-CDs) color and solid state from yellow to orange-red color. The changed PL behaviors are attributed to the more conjugated structure inside CDs due to elevated carbonization degree. Furthermore, the red-shifted fluorescence from aqueous solution to solid state is ascribed to supramolecular cross-linking between adjacent particles. Thus, by manipulating the supramolecular cross-linking degree of YG-CDs in PVA, a series of luminescent blue-shifted CDs/PVA composite phosphors were obtained. Finally, we fabricate the almost full-color and white color LEDs with decent performances, which indicate their potential for solid-state lighting applications.
研究领域:
材料科学
·
光学
·
纳米技术
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 7
·1-10
·
IF 5.479
Lin Bixia,Zhang Tingyun,Xin Xiaolan,Wu Duo,Huang Yan,Liu Yawen,Cao Yujuan,Guo Manli,Yu Ying
Silicon nanoparticles (SiNPs) modified with Eu(III) were synthesized and are shown to be a viable ratiometric fluorescent probe for tetracycline antibiotics. SiNPs/Eu under 405 nm excitation display two emissions, viz. a strong cyan colored fluorescence peaking at 497 nm and a weak pink fluorescence peaking at 622 nm. On addition of tetracyclines (chlortetracycline, tetracycline, doxycycline), the fluorescence at 497 nm is reduced, while the one at 622 nm is increased. Thus, the visible color of fluorescence changes from cyan to pink. This was exploited to design ratiometric fluorometric method for detecting tetracyclines. The method has a limit of detection that is lower by a factor of about 1000 when compared to the use of SiNPs only. A test paper was prepared with the SiNPs/Eu and then applied for the visual semi-quantitative detection of tetracyclines. With the addition of tetracyclines, the test paper exhibited a dosage-sensitive color conversion from cyan to pink with a visually discernible scale as low as 0.4 μM.
Tetracyclines decrease the fluorescence at 497 nm of europium (III) modified silicon nanoparticles (SiNPs/Eu) due to the inner filter effect and increase the one at 622 nm due to an antenna effect. Thus the fluorescence color of SiNPs/Eu changes from cyan to pink. Based on this color switch, a ultrasensitive and visual determination strategy for tetracyclines is proposed.
研究领域:
分析化学
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生物医学工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CRYSTAL GROWTH
·
2024
·
IF 1.7
Sibo Zhao,Dan Xiu,Min Zhang,Yao Wang,Miao Qiu,Christopher D. Snow,Yanxin Wang,Laurence A. Belfiore,Jianguo Tang
In this study, a highly sensitive anticancer drug sensor was synthesized using DNA crystals loaded with luminescent Ln 3+ (Eu 3+ /Tb 3+ ) complexes. The sensors exhibited a pronounced color transformation property due to the differential quenching of Eu 3+ and Tb 3+ emissions upon drug interactions. These luminescent hybrid DNA crystals present a significant advancement in sensing anticancer drugs like curcumin, transitioning from monitoring fluorescence intensity changes to a visually discernable color change. This new approach eliminates the need for specialized instrumentation. Owing to the intrinsic biocompatibility of materials composed of DNA, this hybrid sensor has the potential to sense drugs within the human body. Hybrid crystals loaded with a single complex will lose their fluorescence properties due to drug quenching; however, crystals loaded with mixed complexes emit distinct fluorescent colors, such as yellow-green and orange-red, at different drug concentrations. This color transformation allows for the direct determination of drug concentration based on crystal color, making the sensing process more simple and easily observable.
研究领域:
生物化学
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医学检测
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 42
·11076-11082
·
IF 5.256
Jingjing Mei,Fei Wang,Yunpeng Wang,Cancan Tian,Hongzhen Liu,Dongxu Zhao
In this work, the solvent effects of chemically synthesized CsPbBr3 quantum dots (QDs) were investigated by dissolving the QDs into solvents of different polarities. The QDs exhibited green fluorescence in non-polar solvents like 1-octadecene, hexane and ether, but exhibited blue fluorescent color in solvents of higher polarities (ethanol or acetone). The photoluminescence (PL), Fourier transform infrared (FTIR), transmission electron microscope (TEM) and time-resolved PL characterization revealed the difference between QDs in the two types of solvents. The hydrogen bonding system of –NH2 and polar solvents was responsible for the different fluorescent colors. Also, energy transfer between the QDs and the hydrogen bonding system was observed and confirmed by using ultrafast femtosecond transient absorption spectroscopy. We expect that the solvent effects of CsPbBr3 QDs have potential applications in fluorescence probes and photoelectrical devices.
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2023
·
IF 8.4
Wanjun Long,Yuting Guan,Guanghua Lei,Zikang Hu,Hengye Chen,Yuanbin She,Haiyan Fu
In this work, we constructed a machine learning-assisted dual-channel visual sensor array for identifying the origin of Lilium bulbs (BH). Nanogold clusters (AuNCs) and quantum dots (QDs) were selected and combined into sensor arrays. The amino acids existed in lilium bulbs could induce aggregation-induced fluorescence enhancement effect (AIEE) of AuNCs through hydrogen bonding . The hydrogen protons released from the amino acids and phenolic acids could interact with the COO - group of QDs, resulting in aggregation-caused quenching (ACQ) of QDs. Due to the different contents of amino acids and phenolic acids in BH from different origins, the sensor array can produce distinct and different fluorescent colors , such as red, blue, green and purple. In conjunction with pattern recognition by the RF model, the sensor array clearly identifies the origin of BH with 94.4% prediction accuracy. The visual sensor array constructed in this work exhibited the advantages of simplicity, speed, accuracy and portability, showing potential application prospects in identifying the origin of food and traditional Chinese medicine.
研究领域:
植物学
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食品科学
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中药学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2023
·Vol. 44
·期 7
·2200915
·
IF 4.6
Qian Jiang,Huan Ruan,Chenchen Sun,Tian Wang,Yuping Zhang,Yuan Qiu,Hong Wang,Yonggui Liao,Xiaolin Xie
Bright structural color derived from the unique helical superstructure of cholesteric liquid crystals (CLCs) has attracted much attention. In addition, fluorescence color is an intrinsic emission upon excitation, which can be observed often under UV light. However, it is a challenge to combine the fluorescence and structural colors to construct a self-supporting system at the same time. In this work, a photoresponsive cyanostilbene-based gelator (CSpy-C10) is synthesized, which emits blue fluorescence in LC. CSpy-C10 can gel LCs and further construct thermo-/photoresponsive CLC physical gels. The structural color of the CLCs, fluorescence, and mechanical properties of the gels can be independently regulated due to the separation of the chiral unit and photoresponsive unit with aggregation-induced emission behavior. Finally, the reversible information encryption including writing and erasing based on the changes in fluorescence are explored. This kind of two-color material can be applied in the fields ranging from information encryption, fluorescent display to high-tech anticounterfeiting.
研究领域:
材料科学
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光学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2015
·Vol. 26
·期 11
·8413-8420
·
IF 1.569
Tian Jiao,Ma Qianli,Dong Xiangting,Yang Ming,Yang Ying,Wang Jinxian,Yu Wensheng,Liu Guixia
The flexible color-tunable [Eu(BA) 3 phen + Tb(BA) 3 phen]/PMMA composite nanobelts have been fabricated by single axial electrospinning. Scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and fluorescence spectroscopy were used to characterize the final products. As-prepared nanobelts are almost uniform and the thickness and width of them are respectively ca. 890 nm and 16.6 ± 0.09 μm. The fluorescence intensity of Eu 3+ is increased with adding more Eu(BA) 3 phen into the composite nanobelts, and the fluorescence intensity of Tb 3+ is found to increase monotonically with introducing more Tb(BA) 3 phen into the composite nanobelts. By adjusting the ratio of Eu(BA) 3 phen to Tb(BA) 3 phen complexes, the fluorescence color of composite nanobelts can be tuned from red to yellow, yellow green, and green under the excitation of 290-nm single-wavelength ultraviolet light. Besides, the emission color could also be tuned easily from red to yellow, yellow to green via variation of excitation wavelengths. The novel color-tunable composite nanobelts have potential applications in the fields of color displays and sensor systems.
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
POLYMER INTERNATIONAL
·
2022
·Vol. 72
·期 1
·20-26
·
IF 3.213
Rongli Zhu,Zejun Pu,Xu Wang,Hongbo Hou,Xianyong Li,Jiachun Zhong
In this study, a unique series of luminous polymeric rare earth (RE) composite films was produced by loading RE ions into thermoplastic polyurethane (TPU) using solution blending. Compared to RE ions, luminous polymeric RE composites had greater luminescence intensity, indicating that the introduction of polymer polyurethane as the polymer matrix was advantageous for the luminescence intensity and efficiency of RE ions, with the polymer matrix's absorbed energy being transferred to the RE ions. Furthermore, the findings of the optical transmittance, UV–visible absorption and fluorescence emission spectra suggest that TPU-RE composite films possess exceptional fluorescence luminescence properties and optical transparency. Surprisingly, the fluorescence colors of TPU-RE fluorescent films could be adjusted between red and green by varying the ratios of Eu 3+ and Tb 3+ in the films and can be any mixture of red and green hues. In addition, the temperature at 5% weight loss ( T 5% ) for the TPU-RE composite film composition reached 250 °C. In addition, pure TPU and all TPU-RE hybrid films demonstrated a glass transition temperature ( T g ) of about −30 °C. Simultaneously, the tensile strength of the TPU-T 0 E 10 film reached its maximum (43.6 MPa). Consequently, the TPU-RE composite films will be utilized as photoluminescent functional materials. © 2022 Society of Industrial Chemistry.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2022
·Vol. 41
·期 4
·547-555
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IF 3.815
Shi Hui-Hui,Wu Shuang-Shuang,Wang Rui-Jia,Zhang Yi,An Shu-Hui,Lu Wei,Chen Tao
Mechanofluorochromic materials that render sensitive fluorescence color/pattern change upon mechanical stimuli have drawn extensive attention. However, traditional mechanofluorochromism relies on the chemical transformations of mechanophores, but their types are quite few. It remains challenging to develop mechanofluorochromic materials with customized fluorescence color changing response. Herein, a generally applicable strategy is proposed to present a class of double-layer mechanofluorochromic hydrogels based on the facile integration of two different-colored fluorescent hydrogels. Due to the UV transmittance change of top layer under Poisson’s effect, the emission intensity ratio of the upper and lower hydrogels exhibits a strain-dependent change, resulting in a force-triggered overlapping color variation. Both the UV transmittance of top layer and the fluorescence emission of bottom layer can be readily modulated to enrich the variety of mechanofluorochromism. Besides, the bottom layer is available to be printed by ion inks to fabricate patterned double-layer fluorescent hydrogel, holding great potential to design flexible mechanofluorochromic platforms for smart display and information encryption.
研究领域:
材料科学
·
生物医学工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 47
·2304204
·
IF 13.3
Junni Xie,Shuxin Wei,Wei Lu,Shuangshuang Wu,Yi Zhang,Ruijia Wang,Ning Zhu,Tao Chen
Utilization of life-like hydrogels to replicate synergistic shape/color changeable behaviors of living organisms has been long envisaged to produce robust functional integrated soft actuators/robots. However, it remains challenging to construct such hydrogel systems with integrated functionality of remote, localized and environment-interactive control over synergistic discoloration/actuation. Herein, inspired by the evolution-optimized bioelectricity stimulus and multilayer structure of natural reptile skins, electronically innervated fluorescence-color switchable hydrogel actuating systems with bio-inspired multilayer structure comprising of responsive fluorescent hydrogel sheet and conductive Graphene/PDMS film with electrothermal effect is presented. Such rational structure enables remote control over synergistic fluorescence-color and shape changes of the systems via the cascading “electrical trigger-Joule heat generation-hydrogel shrinkage” mechanism. Consequently, local/sequential control of discoloration/actuation are achieved due to the highly controllable electrical stimulus in terms of amplitude and circuit design. Furthermore, by joint use with acoustic sensors, soft chameleon robots with unprecedented environment-interactive adaptation are demonstrated, which can intelligently sense environment signals to adjust their color/shape-changeable behaviors. This work opens previously unidentified avenues for functional integrated soft actuators/robots and will inspire life-like intelligent systems for versatile uses.
研究领域:
材料科学
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生物仿生学
·
软体机器人
✓ 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）