Micromachines
·
2019
·Vol. 10
·期 12
·884
·
IF 2.426
Zhao Xi Song,Hui Hui Chai,Feng Chen,Ling Yu,Can Fang
Seed germination and seedling root development are important indicators of plant development. This work designed and fabricated a foldable microfluidic chip array for conducting nondestructive and continuous evaluation of seed germination and subsequent seedling development in situ. Each plant chamber has two functional units: seed germination part and root-growth part. The root-growth parts are themselves connected to a single channel designed to provide a uniform culture medium for plant growth. The individual chips are connected into an array using elastic hinges that facilitate the folding and unfolding of the array to accommodate different viewing purposes. In the folded state, the seed germination chambers form a closely spaced array platform to facilitate the comparison of seed germination and plant development characteristics. Unfolding the array facilitates a clear examination of root development within the root-growth parts. The observation window of an individual chip facilitates either the direct examination of the developing seedling (e.g., stems and leaves) or the use of a microscope for examining microscale features (e.g., root tips and root hairs). The potential of the proposed foldable chip array as a new cultivation platform for botanic studies is demonstrated by examining the seed germination and seedling development of tobacco (Nicotiana tabacum) under different cultivation conditions.Keywords:seed germination;root development;plant cultivation;microfluidic;foldable
研究领域:
植物学
·
生物工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Jun Deng,Yanhong Song,Shuai Liu
Phakic intraocular lenses (pIOLs) are an increasingly popular treatment for refractive errors, particularly myopia. However, there are limited materials available for pIOLs, and each has its issues such as non-foldability, low refractive index (RI), glistenings, or bioadhesion. In response to existing challenges, a series of poly(styrene-block-isobutylene-block-styrene) (SIBS) block copolymers are evaluated for pIOL application, and methacryloyloxyethyl phosphorylcholine (MPC) is grafted onto SIBS to further improve its anti-adhesive properties in this work. By controlling the styrene content, SIBS exhibits a tunable high RI of 1.521–1.532. Meanwhile, the SIBS materials are foldable and possess a glass transition temperature ( T g ) below −60°C. Furthermore, SIBS has a very low average glistening density below 20 MV/mm 2 . Given the hydrophobic nature of the materials, MPC is grafted onto the surface of SIBS, resulting in a notable decrease in water contact angle, protein adsorption, and relative bacterial adsorption from 102.7° ± 2.3°, 12.13 ± 1.82 μg/cm 2 , and 1.00 ± 0.33 to 78.2° ± 0.2°, 3.16 ± 0.93 μg/cm 2 , and 0.02 ± 0.01, respectively. Cytotoxicity and in vivo subcutaneous implantation experiments demonstrate that both SIBS and its modified counterpart are noncytotoxic and biosafe. Collectively, SIBS-based materials represent a promising option for the next generation of pIOLs.
研究领域:
眼科医学
·
生物材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 36
·
IF 1.768
Jinku Xu,Weiyue Zhu,Leilei Zhang,Yongchun Zhang
In this article, carbazole-grafted methacrylic polysiloxane (MA-CZ-PDMS) macromonomer was synthesized and its structure was confirmed by proton nuclear magnetic resonance ( 1 H NMR). The polysiloxane macromonomer can homogeneously copolymerize with methyl methacrylate (MMA) to prepare transparent and foldable carbazole-grafted polysiloxane-poly(methyl methacrylate) (PDMS-PMMA) membranes with a high refractive index (RI). The membranes were characterized by light transmittance, RI value, and dynamic mechanical thermal analysis (DMTA). The results indicated that the carbazole-grafted PDMS-PMMA membranes had excellent light transmittance that decreased slightly with increasing carbazole-grafted polysiloxane content. Incorporation of carbazole-grafted polysiloxane in the materials improved its RI value; however decreased the glass transmission temperature ( T g ) that can be adjusted to less than 30°C, enable the membrane foldable at room temperature. The data demonstrate that the carbazole-grafted PDMS-PMMA membranes have a potential application as high RI intraocular lens (IOL) suitable for implantation by minimally invasive surgery. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42491.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2023
·Vol. 35
·期 11
·115701
·
IF 3.5
Xi Chen,Jie Liu,Xun Li,Zhiqun Cheng,Tian-Song Deng
Colloidal gold nanorods (GNRs) have demonstrated their potential to absorb light within specific wavelength bands and induce photothermal effects. However, the unpredictability and lack of adjustability in the broadband spectrum formed by the self-assembly of gold nanospheres or the coupling of various sizes of GNRs have posed significant challenges. To address this, we have developed broadband GNRs (BGNRs) with a predictable and adjustable extinction band in the visible and near-infrared regions. The BGNRs were synthesized by simply mixing GNRs with different aspect ratios, allowing for control over the bandwidths and positions of the extinction bands. Subsequently, the BGNRs were coated with silica and underwent surface modification. The resulting BGNRs@SiO2 were then mixed with either polydimethylsiloxane (PDMS) or polyvinylidene fluoride (PVDF) to create BGNRs@SiO2/PDMS (or PVDF) films. The BGNRs@SiO2/PDMS and BGNRs@SiO2/PVDF films both exhibit excellent photothermal performance properties. Additionally, the light absorption intensity of the BGNRs@SiO2/PVDF film linearly increases upon folding, leading to significantly enhanced photothermal performance after folding. This work demonstrates that plasmonic colloidal GNRs, without the need for coupling, can yield predictable and adjustable extinction bands. This finding holds great promise for future development and practical applications, particularly in the transfer of these properties to films.
研究领域:
纳米技术
·
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zhezhe Deng,Yongshuai Xie,Wei Liu,Jianhong Dong,Ying Peng,Ze Zhu,Luyi Zhu,Guanghui Zhang,Xinqiang Wang,Dong Xu
HfO 2 is an important high temperature resistant material, which has a high melting point (2810 °C), good chemical stability and high thermal radiation. Fibrous material has some advantages for heavy refractory matter, such as large aspect ratio, light weight, more energy saving, flexibility and further can be processed into a variety of product forms. In this paper, high strength HfO 2 crystalline nanofibers were prepared through self-synthesis polyacetylcatonahafnium (PAHf) with electrospinning method. Phase variation process was discussed in detail, and the HfO 2 fibers that use Y 2 O 3 as stabilizer with phase stability were prepared finally. The fibers were composed of nanocrystals with good flexibility even folded in half, tensile strength of 1.6 MPa @ 1000 °C and can lifting up 1288 times its own weight, low density around 35 mg/cm 3 . The thermal conductivity was stable around 26 mW / (m·K) @ 1200 °C and the temperature can be cooled from 1200 °C to 396 °C after 180 s through 7 mm fibrous membranes . And after treated at 1200 °C for 5 h, the fibrous membranes also maintain high strength and good flexibility. By this kind of precursor method, high strength oxide fibers can be obtained, which has a wide application prospect in field of high temperature thermal protection.
研究领域:
材料科学
·
高温防护领域
✓ 已验证
产品关联
DOI
高影响因子
Advanced Fiber Materials
·
2022
·Vol. 4
·期 5
·1177-1190
·
IF 12.958
Zan Guangtao,Wu Tong,Dong Wenya,Zhou Junchen,Tu Teng,Xu Ruoxuan,Chen Yun,Wang Ying,Wu Qingsheng
Due to the lack of in-depth understanding about the folding issues of the electronic materials, it is a huge challenge to prepare a super-foldable and highly electrochemical faradic electrode. Here, inspired from from the fully nimble structures of cuit cocoons and cockscomb petals, with two-level biomimetic design, for the first time we prepared a super-foldable and electrochemically functional freestanding cathode, made of C-fiber@NiS-cockscomb (SFCNi). In virtue of its nimble biomimetic structures, SFCNi can remarkably sustain over 100,000 times, repeated true-folding without composite fibers fracture, functional matters detachment, conductivity degradation, or electrochemical performance change. The main mechanism behind these behaviors was disclosed by Real-time scanning electron microscopy and mechanical simulations, on the folding process. Results unveil that the cockscomb-like NiS with atomic thickness can deform freely due to the need of bending, and the cuit-cocoon-like SFCNi can generate an “ ε-shape ” folding structure at the crease. Such a smart self-adaptive deformation capability can effectively reduce the effect of stresses and local excessive deformations, so that the chemical bonds can preserve their interaction, and the material won’t fracture. This subtle and exceptional mechanical behavior realizes a super-foldable property. The two-level biomimetic design strategy is a novel method for fabrication of super-foldable composite electrodes and integrated multi-functional super-foldable devices. Graphical abstract
研究领域:
材料科学
·
电化学
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2021
·Vol. 34
·期 1
·2106897
·
IF 30.849
Jiahui Zhou,Man Xie,Feng Wu,Yang Mei,Yutong Hao,Li Li,Renjie Chen
A 3D host can effectively mitigate the dendritic growth of a zinc (Zn)-metal anode. However, the increased electrode/electrolyte reaction area using the 3D substrate accelerates the passivation and corrosion at the anode interface, ultimately degrading the electrochemical performance. Here, an oriented freezing process is used to create a flexible MXene/graphene scaffold. Based on the abundant zincophilic traits and micropores in the structure, Zn is densely encapsulated inside the host by the electrodeposition process. During cycling, the composite anode endows an in situ solid electrolyte interface with zinc fluoride at the electrode/electrolyte interface due to inherent fluorine terminations in MXene, efficiently inhibiting the dendritic growth. Furthermore, the design wherein bulk Zn is distributed in a 3D microscale manner suppresses hydrogen evolution reactions (3.8 mmol h −1 cm −2 ) and passivation, through in/ex situ tests. As a result, in a symmetrical cell test, the electrode has a long-cycling life of over 1000 h at 10 mA cm −2 . After continuous single folding followed by double folding, a quasi-solid-state foldable cell with the composite anode and a LiMn 2 O 4 cathode (60% depth of discharge) maintains high-capacity retention of over 91%. This research presents a revolutionary encapsulating idea for aqueous Zn-ion batteries, as well as foldable investigation.
研究领域:
材料科学
·
电化学
·
储能技术
✓ 已验证
DOI
高影响因子
Nanoscale
·
2025
·
IF 5.1
Kun Li,Kun Liu,Dingxuan Wang,Dongyu Lvyu,Jue Cheng,Junying Zhang,Haobo Zhang,Feng Gao
The tethering of silver nanowires (AgNWs) on the optical polymeric membrane is regarded as one of the most applicable strategies constructing flexible transparent conductive electrodes (FTCEs) meeting the growing demand from flexible electronics. However, it remains a challenge to establish reliable connections between AgNWs and polymeric surface enhancing the foldable stability of FTCEs without alternating the transparency. Herein, a bifunctional interfacial engineering strategy was proposed, synergizing covalent anchoring and passivation shielding to concurrently achieve folding stability, silver migration suppression, environmental stability, and retained optical transparency. Polyethylene terephthalate (PET) surface was decorated via carbene, which was able to insert to C-H bonds instantaneously with the chain propagation hardly observed, forming the quasi-monolayer of thiol groups covalently connected with the most top layer of the PET substrate, without altering the transparency. The adhesion strength between AgNWs and PET surface was greatly enhanced by the Ag-S bonds, where the AgNWs surface frame and the sheet resistance showed no significant change after 100 seconds ultrasonic treatment in DI water and 1000 times folded, respectively. The surface decoration endowed the prepared FTCEs with high visible light transparency (85%), low sheet resistance (11.5 Ω/sq) and high infrared reflectivity (65%) simultaneously. Fluorinated alkyl chains were covalently decorated on the prepared FTCEs, forming the Ag-S bonds and protecting the electrode from the invasion of moisture, which effectively suppressed Ag migration. The presenting surface modification strategy provides a robust solution for constructing long-term stable AgNWs based FTCEs.
研究领域:
材料科学
·
纳米技术
·
电子学
·
高分子科学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yanjun Pang,Xinxin Luan,Kefeng Zhang,Yuxiang Liu,Lu Li,Congxia Xie,Jinhui Pang
In this study, we have successfully prepared a freeze-resistant conductive hydrogel with a fast polymerization rate and excellent mechanical and adhesive properties. In this paper, hydrogels capable of rapid polymerization in a short time were prepared based on the TA@WSCA-Zn (WSCA, water-soluble cellulose acetate; TA@WSCA, tannic acid-coated WSCA suspension; TA@WSCA-Zn, a certain amount of zinc chloride (ZnCl 2 ) was added to TA@WSCA suspension;) autocatalytic system at room temperature or low temperature. TA@WSCA-Zn forms a stable reversible quinone-catechol redox reaction to activate the decomposition of ammonium persulfate (APS, initiator) to produce SO 4 −· radicals, which triggers the ultra-fast polymerization of amphoteric ([2-(methacryloyloxy) ethyl] dimethyl-(3-sulfopropyl), SBMA) and acrylic monomers (AA). To improve the frost resistance and electrical conductivity of the hydrogels, we also introduced amphoteric ions, which can provide migration channels for Zn 2+ and greatly increase the migration rate. The TA@WSCA-7.5/PSA hydrogel (PSA, hydrogel prepared by polymerization of acrylic acid and SBMA as monomers;) can achieve tensile strength and toughness of 1.33 MPa and 4.89 MJ m −3 . It can provide excellent electrical conductivity and interfacial adhesion over a temperature range of 25 to −60 °C. In addition, the supercapacitor assembled from the TA@WSCA-7.5/PSA hydrogel electrolyte still has good capacitance characteristics after folding and 10,000 charge/discharge cycles, with a capacitance retention of 93.33 % and an excellent cycle life. This autocatalytic system provides a new strategy and approach for the preparation of freeze-resistant conductive hydrogel electrolytes.
研究领域:
材料科学
·
电化学
·
聚合物化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Xiao-Fei Wang,Gui-Gen Wang,Jia-Bing Li,Zheng Liu,Wen-Feng Zhao,Jie-Cai Han
In this article, a new application of using S, N co-doped graphene quantum dots (S, N-GQDs) as ideal color converters in solid-state white light-emitting diode (WLED) is reported. To this end, the S, N-GQDs with an average diameter of ∼4.46 nm are obtained by a hydrothermal approach using citric acid and thiourea as source materials. The PL spectra of S, N-GQDs show an excitation-independent behavior in the range of 300–380 nm. Under UV illumination, the S, N-GQDs display intense blue-light with the quantum yield of 51.2%. The PL mechanism is also investigated. Then, we fabricate freestanding luminescent composite films in a solution casting method by combining S, N-GQDs with YAG:Ce 3+ phosphors based on a polyvinyl alcohol (PVA) matrix. The luminescent films have superior foldability and photostability and excellent heat resistance, and retain their optical performances in the solid-state. To realize their potential, a high-powered remote WLED has been demonstrated. The results indicate that S, N-GQDs and YAG:Ce 3+ can be homogeneously dispersed in the PVA without aggregation so that uniform white-light emission can be obtained. These composite films containing S, N-GQDs are promising to be used in state-of-the-art UV-pumped remote WLED according to their wide wavelength emission and collapsible illumination device.
研究领域:
材料科学
·
光电技术
·
纳米技术
·
光子学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xiao Yu,Qi Liu,Zhenqian Wu,Wenxia Zhao,Ruimei Xu,Yong Liu
Flexible and foldable Li-ion batteries (LIBs) are presently attracting immense research interest for their potential use in wearable electronics but are still limited to electrodes with very small mass loading, low bending/folding endurance, and poor electrochemical stability during repeated bending and folding movements. Moreover, one-dimensional (1D) structured electrode materials have shown excellent electrochemical performance but are still restricted by the high cost and complicated fabrication process. Here, we present a very simple yet novel approach for fabricating extra-long Li4Ti5O12 (LTO) and LiCoO2 (LCO) nanofiber precursors by directly stirring the reagents in an atmospheric vessel. In addition, we present multilayer pyramid/inverted pyramid interlocking inside the LTO and LCO nanofiber films as well as between films and current collectors, which can create strengthened interfacial bonding like a zipper and tangentially disperse the strains generated during folding through the pyramidal planes and edges, leading to the realization of thick-film electrodes with outstanding electrochemical stability during folding movements. The foldable LIBs that are assembled with LTO and LCO nanofiber electrodes at a practical level of mass loading (14.9–19.4 mg cm–2) can maintain 102% of the initial capacity after 15 000 times of fully folding (180°) motions.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Kefeng Zhang,Yanjun Pang,Changzhou Chen,Miao Wu,Yuxiang Liu,Shitao Yu,Lu Li,Zhe Ji,Jinhui Pang
In this study, the anti-freezing conductive hydrogel electrolytes with outstanding mechanical properties were synthesized by a facile and feasible method. The mechanical and anti-freezing properties of the synthesized polyacrylamide/lithium lhloride/water soluble cellulose acetate (PAM/LiCl/WSCA) hydrogels are significantly enhanced with the addition of WSCA and LiCl. The tensile strength and toughness of the gels were gradually increased to 341 KPa and 1.2 MJ/m 3 , respectively. The hydrogel electrolyte can remain soft and flexible at −80 °C, displaying certain elasticity and electrical conductivity . In addition, the super-capacitor assembled with PAM/LiCl/WSCA hydrogel as electrolyte showed excellent stability in capacitance retention after 500 times of folding cycles and 10,000 times of charge and discharge tests. The capacitor still maintains 64.64 % of its capacity at −40 °C. This facile strategy to fabricate anti-freezing conductive hydrogel electrolyte provides a new idea and way to the application of hydrogels as electrolytes in extreme cold environments.
研究领域:
材料科学
·
电化学
·
能量存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）