Soft Matter
·
2016
·Vol. 12
·期 25
·5572-5580
·
IF 3.798
Jingfang Li,Jing Xu,Xiaodong Li,Wenmei Gao,Liyan Wang,Lixin Wu,Myongsoo Lee,Wen Li
A series of cationic peptides with alternating lysines and hydrophobic residues were designed and synthesized. These kinds of short peptides with protonated lysines can complex with anionic heteropoly acids (HPAs) to form a stable gel in water/ethanol mixed solution. Circular dichroism spectroscopy showed that the short peptides adopted a mixed conformation (β-sheet and random-coil) within the gel matrix. Scanning and transmission electron microscopy revealed that the heteropoly acids, acting as nanosized cross-linkers, first initiated the self-assembly of the cationic peptides into spherical nanostructures. Then these nanospheres accumulated with each other through hydrogen bonds and hydrophobic interactions to form large sheet-like assemblies, which further interconnected with each other forming continuous 3D network structures. Fourier-transform infrared spectroscopy showed that the structural integrity of the HPAs was maintained during the gelation process. The resultant hybrid gels showed reversible photo- and elecrtro-chromic properties. X-ray photoelectron spectroscopy revealed that the hybrid gels, capable of persistent and reversible changes of their colour, are attributed to the intervalence charge-transfer transition of the HPAs. Reversible information writing and erasing were demonstrated through a repeated photo-lithograph or electric stimuli without significant loss of the gel performance.
研究领域:
生物化学
·
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Rujun Yang,Long Chen,Cunjian Lin,Honghui Huang,Zishuang Wu,Chenhan Zhan,Yixi Zhuang,Rong-Jun Xie
Photochromism and persistent luminescence (PersL) are two fascinating light-responsive effects in phosphors, both of which have found widespread applications in optical switching, optical anticounterfeiting and information storage. However, the relationship between photochromism and PersL has not been clarified, thus greatly limiting the use and design of the light-responsive materials in multifunctional applications. Herein, taking BaMgSiO 4 :Eu 2+ , TM (TM = transition metal: Fe, Co and Cr) as model materials, we first reveal that photochromism and PersL could be two independent photophysical effects, although they are both related to the charge carrier trapping/detrapping processes. Notably, photochromism and PersL show have different responses to light wavelengths, and the depth of traps involved in the two effects is also quite different. Moreover, by codoping different transition metal elements, we obtain the largest reflectance difference of ∼71 % among inorganic photochromic materials reported thus far, and demonstrate interesting multicolor photochromism, including magenta, golden and pink. Based on their distinct response to light and temperature, a multi-functionalized optical anticounterfeiting technology is proposed, which may open up a new avenue for applying the light-responsive materials in flexible electronics and wearable devices.
研究领域:
材料科学
·
光学
·
光子学
·
纳米技术
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 18
·3049
·
IF 4.329
Yuhua Zhang,Xi Zhang,Yurong Yan,Zhonghua Chen
Photochromic materials are interesting materials because of their color-changing property under UV light and visible light irradiation. However, they are vulnerable to many factors, such as pH oxygen, ion, solvent, etc. because of the unsaturated bonds existing on the photochromic molecular. Microencapsulation of the photochromic materials can separate them from the surroundings. Here, photochromic microcapsules using 3,3-Diphenyl-3H-naphtho[2,1-b] pyran (NP)/solution as core and polyurea as shell via interfacial polymerization were prepared, and bis(2,2,6,6-tetramethyl-4-piperidinyl)sebacate (HALS 770) was used as photostabilizer. Fourier transform infrared spectroscopy (FTIR), a laser particle size analyzer, a scanning electron microscope (SEM), a thermogravimetric analyzer and an ultraviolet-visible spectrophotometer were used for characterization. The results showed that the microcapsules had a uniform particle size of about 0.56 μm when the percentage of the oil phase (core) in the emulsion was less than 15%, the addition amount of the emulsifier was 0.4%, and the stirring rate was 1800 r/min. The microcapsules showed better performance in thermal stability when the core/shell ratio was 1:1. The photostabilizer had little impact on the color-changing property of the microcapsule, but it could protect the microcapsules from UV light radiation aging.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2022
·
IF 5.122
Chen Wang,Qing Yan,Sheng Wang,Derong Cao
A novel donor-acceptor Stenhouse adducts (DASAs) derivative ( DASA-IDN ) was constructed by introducing phenanthroimidazole (PI), tetraphenylethylene (TPE), triphenylamine (TPA) moieties into the DASAs molecular system. The multi-stimuli response process, photochromic and fluorescence properties of DASA-IDN were investigated. When irradiated with visible light, the color of DASA-IDN solution fade quickly and the fluorescence lighted up rapidly. Heating under darkroom could restore it to the initial state. Moreover, solid film of DASA-IDN have been achieved and utilized for information storage. Remarkably, DASA-IDN exhibited versatile switching behavior in response to acid, base and light, turning it into an efficient multi-stimuli responsive molecule.
研究领域:
有机化学
·
材料科学
·
光化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Hongbo Xia,Zikang Wu,Qiyue Tang,Zijian Yang
Ultraviolet (UV) irradiation is dangerous and can cause serious skin diseases if skin is excessively exposed to it. Thus, it is highly desirable for human health to monitor the UV radiation intensity. In this report, a flexible and stretchable dual-response UV radiation detector is reported by integrating UV-responsive color-switchable WO3 quantum dots (QDs) with an electrical hydrogel. With the radiation intensity of UV increasing from 0.5 to 10 mW/cm2, the color of the hydrogel switched to dark blue gradually due to the excellent photochromic property of WO3 QDs to UV radiation. Furthermore, a linear relationship can be established between color difference and UV radiation intensity. Hence, the color difference of the hydrogel under solar UV irradiation can be used to estimate the solar UV radiation intensity in daily life. In addition, when the UV radiation intensity is greater than 10 mW/cm2, the photochromic hydrogel converts the colorimetric response into the electrical resistance change. Thus, due to its excellent photochromic and electrical resistance response properties for UV irradiation, the prepared hydrogel provides an idea for developing novel detection instruments.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xinrui Fang,Zhong Zhang,Qing Wang,Yuxin Xu,Haitao Niu,Hua Zhou
Multifunctional photochromic cotton fabrics have enormous application potential in our daily lives, but still suffer from poor durability, slow coloration, tedious fabrication process, and short service life. The hydrophilic and polysaccharide characteristics of cotton fabrics make them vulnerable to bacteria adhesion and proliferation. Herein, intelligent photochromic cotton fabrics featured with durable superamphiphobicity are fabricated by in situ growth of ZIF-8 nanoparticles encapsulating spirooxazine (SP) photochromic dyes on the fabric surface, followed by low surface energy treatment using a fluorocarbon resin (FR) via a dip-coating method. The resultant SP@ZIF-8/FR cotton fabrics exhibit superamphiphobicity with contact angles of over 150° to both water and oils (surface tension ≥30 mN/m). When exposed to UV light, the fabric rapidly changes its color from white to blue within 10 s and fades in 2 min under visible room light. The developed SP@ZIF-8/FR coating is durable against numerous damages in daily usage, such as machine laundry, abrasion and UV irradiation, without losing photochromic and superamphiphobic properties. The high durability and excellent reversible color response allow the coated fabric to intuitively and quantitatively monitor outdoor UV intensity. Owing to the presence of ZIF-8, the treated fabrics also show excellent antibacterial property with antibacterial rates of over 99 % against both E. coli and S. aureus . The developed fabric coating can be engineered to visually assess the UV intensity in the outdoor environment.
研究领域:
材料科学
·
纺织工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuting Tian,Weining Liu,Jun Hu,Zhiwei Li,Xiaoying Xin,Guodong Fu
The persistent global high-temperature weather warns us that improving energy efficiency and reducing CO 2 emissions are urgent. Controlling the solar energy input in buildings using photochromic smart coating can effectively reduce the energy consumption required for cooling. However, it remains a challenge to achieve high transparency and fast photoresponse in organic–inorganic hybrid photochromic smart coating. Herein, we utilize space-limited domains to design a template polymer that facilitates the formation of amorphous WO 3 nanodots, thereby enhancing the polymer network structure through hydrogen bonding and dipole–dipole interactions, which endow the smart coating with excellent adhesion strength up to 13 MPa. Notably, the photochromic smart coating with amorphous WO 3 nanodots exhibits higher transparency (96.8 %) than conventional glass (91 %), and a wide visible light modulation range of 96.8 %-4.8 %. Based on this, the cooling efficacy of the smart photochromic coating was assessed within a model residence under actual environmental conditions. The inner temperature of the model house was reduced by up to 13 °C, which decreased indoor heat absorption by 25.8 %, significantly improving energy efficiency. This work provides an important and attractive strategy for achieving energy-efficient building materials and addressing global climate warming.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wen Si,Shaochen Wang,ZhengTing Yu,Xin Dai,Molan Guo,Zhiguang Guo
Photochromism, a reversible color change induced by light exposure, has applications in optical information storage and transmission, chemical sensors, and rewritable systems. However, current photochromic materials face challenges such as high cost, toxicity, slow coloration, low efficiency, and poor durability, hindering their real-world applications. In this study, we designed a tungsten oxide-based photochromic material using hydrothermal and fluorination techniques, resulting in superamphiphobicity, low adhesion, thermal and chemical resistance, as well as UV and abrasion resistance. The superamphiphobicity is attributed to the flower-like hierarchical structure. By controlling the morphology and introducing organic fluorosilane as an electron donor to facilitate rapid electron transfer and proton insertion, we significantly enhanced the photochromism of the modified surface. The modified photochromic material faded within 3 min of UV irradiation and 90 min of heating at 80 °C in air. This development exhibits environmentally friendly, low cost, fast color conversion, scalability for mass production, and adaptability to harsh environments, indicating significant potential for applications in fields such as information security storage and rewritable materials.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xingchen Cui,Zhezhi Li,Zhihui Yi,Bing Zhang,Xing Gao,Fuqiang Fan,Yu Fu,Junbiao Wu,Tieqiang Wang
Shape-transformation soft actuators that can quickly respond to external stimuli have been potential candidates in biomimetic soft robots and flexible driving devices. However, the lack of shape reprogrammability restricts their complexity of deformation as well as reusability in practical application. Herein, we present a unique reprogrammable actuator based on asymmetric bilayer compounding with UV-modulated photochromic complex (NEU20) through a sequential polymerization process. The UV-induced electron transfer photochromic behavior synergistic with NIR photothermal effect of NEU20 fillers endows the soft actuator with rapid (∼90°/s) and customizable actuation under external NIR stimuli. Through the joint modulation of UV exposure region and duration, the UV-induced photothermal conversion efficiency is also adjustable at each local, facilitating the spatio-temporally programmable actuation process of the hybrid bilayer actuator. Significantly, the programmed actuation process of the actuator also features thermal-erasing and UV-reprogramming capacities, highlighting the unique recyclability of the hybrid actuator. In addition, the proposed reprogrammable actuator also demonstrates good universality in combination with other thermal-responsive active material systems. This work offers insight into the design and fabrication of reprogrammable soft actuators, shining enlightenment for potential application in bioinspired soft robots and smart mechanical devices.
研究领域:
材料科学
·
机器人学
·
智能设备
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2024
·
IF 4.1
Yan Bao,Lu Gao,Pei Han,Feng Liu,Junbing Zhou,Wenbo Zhang
With advancements in smart materials, photochromic polyurethane (PU) shows considerable promise for applications in anti-counterfeiting, optical storage, and colorimetric sensing. However, significant challenges remain, such as reliance on solvent-based PU, poor color fastness due to blending methods, and limited color options, hampering its broader application. In response, this study selected trichromatic spiropyrans (SPs, SP-R , SP-Y , and SP-B ) from preparing 14 hydroxyl-containing SPs. Under UV irradiation, SP-R , SP-Y , and SP-B can colorless transform to red, yellow, and blue, respectively. The photochromic waterborne polyurethanes (WPUs) were synthesized by incorporating trichromatic SPs as end-capping agents into WPU chains (denoted as CWPU-R/Y/B), exhibiting excellent photochromic performance. Unlike simple blending, the CWPU-R/Y/B process superior photochromic fatigue resistance (50 cycles), emulsion stability (6-month storage), solvent resistance, and color fastness (achieving the highest grade of 5), due to the covalent bonding effect. Furthermore, CWPU films with various colors were achieved through simple color mixing, providing a broader spectrum to meet diverse application needs. The potential application of CWPU in the anti-counterfeiting field was preliminarily explored, showing the gratifying results. This study presents a novel material applicable to the next generation of smart packaging, electronic information, and coatings.
研究领域:
材料科学
·
化学工程
·
智能材料
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Lizhen Lu,Haoyu Zhang,Jinghui Wang,Haolin Wang,Qian Chen,Jinbo Xue,Qianqian Shen,Chunliang Zhou,Jian Ku Shang,Qi Li
A ferroelectric ceramic material of Na 0.5 Bi 0.5 TiO 3 was found to possess a pronounced, long-lasting, and fast-switchable photochromic behavior responsive to visible light. The working mechanism of its photochromism could be attributed to an interesting photocatalytic memory effect , during which photogenerated electrons were trapped by Bi 3+ /Ti 4+ and oxygen vacancies generated in Na 0.5 Bi 0.5 TiO 3 . The release kinetics of trapped electrons could be modulated by controlling environment conditions to make its photochromism phenomenon both long-lasting and fast-switchable to meet various application requirements. In the meantime, the photochromism process changed its inner electronic structure, resulting in stronger oxidation capability, increased piezoelectric response, improved charge carrier separation and transfer, and more active oxygen species production. Thus, its photocatalytic, piezocatalytic and photopiezocatalytic performances were all significantly enhanced as demonstrated by its TC-HCl degradation performances. This work offered a novel approach to search for and design inorganic photochromic materials with good reversibility for various technical applications.
研究领域:
材料科学
·
光催化
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 8
·1031
·
IF 4.7
Shijun Long,Fan Chen,Han Ren,Yali Hu,Chao Chen,Yiwan Huang,Xuefeng Li
Shape-shifting polymers usually require not only reversible stimuli-responsive ability, but also strong mechanical properties. A novel shape-shifting photochromic hydrogel system was designed and fabricated by embedding hydrophobic spiropyran (SP) into double polymeric network (DN) through micellar copolymerisation. Here, sodium alginate (Alg) and poly acrylate-co-methyl acrylate-co-spiropyran (P(SA-co-MA-co-SPMA)) were employed as the first network and the second network, respectively, to realise high mechanical strength. After being soaked in the CaCl2solution, the carboxyl groups in the system underwent metal complexation with Ca2+to enhance the hydrogel. Moreover, after the hydrogel was exposed to UV-light, the closed isomer of spiropyran in the hydrogel network could be converted into an open zwitterionic isomer merocyanine (MC), which was considered to interact with Ca2+ions. Interestingly, Ca2+and UV-light responsive programmable shape of the copolymer hydrogel could recover to its original form via immersion in pure water. Given its excellent metal ion and UV light stimuli-responsive and mechanical properties, the hydrogel has potential applications in the field of soft actuators.
研究领域:
材料科学
·
高分子化学
✓ 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）