ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Xianchong Miao,Ningning Xuan,Qi Liu,Weishu Wu,Hanqi Liu,Zhengzong Sun,Minbiao Ji
Two-dimensional (2D) materials have attracted broad research interests across various nonlinear optical (NLO) studies, including nonlinear photoluminescence (NPL), second harmonic generation (SHG), transient absorption (TA), and so forth. These studies have unveiled important features and information of 2D materials, such as in grain boundaries, defects, and crystal orientations. However, as most research studies focused on the intrinsic NLO processes, little attention has been paid to the substrates underneath. Here, we discovered that the NLO signal depends significantly on the thickness of SiO2 in SiO2/Si substrates. A 40-fold enhancement of the NPL signal of graphene was observed when the SiO2 thickness was varied from 270 to 125 nm under 800 nm excitation. We systematically studied the NPL intensity of graphene on three different SiO2 thicknesses within a pump wavelength range of 800–1100 nm. The results agreed with a numerical model based on back reflection and interference. Furthermore, we have extended our measurements to include TA and SHG of graphene and MoS2, confirming that SiO2 thickness has similar effects on all of the three major types of NLO signals. Our results will serve as an important guidance for choosing the optimum substrates to conduct NLO research studies on 2D materials.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Ge Li,Rui Cheng,Hengyang Cheng,Xiao-Qing Yu,Luting Ling,Cai-Feng Wang,Su Chen
Robust hybrid microbeads with multiple optical signals have garnered widespread interests for various applications. However, the inefficient physical combination and the potential toxicity of raw materials (heavy metal-based quantum dots) have limited their sustainable development. Herein, we report a microfluidic strategy to achieve the continuous production of environmentally friendly carbon dots (CDs)-functionalized photonic crystal (PC) microbeads. The efficient mass and heat transfer on microscales and the covalent bonding crosslink between CDs and poly (methyl methacrylate-butyl acrylate-methacrylic acid) (P(MMA-BA-MAA)) colloid particles ensure effective assembly of CDs-P(MMA-BA-MAA) PC microbeads in the microchannel. Benefiting from this, the CDs-P(MMA-BA-MAA) hybrid microbeads behave stable fluorescence properties, together with highly saturated and angle-independent structural color, which can overcome the optical information confusion and distortion. Meanwhile, the obtained CDs-P(MMA-BA-MAA) hybrid microbeads show dual optical signal responsiveness through the variation of fluorescence and structural color under different ionic environment. Based on this, we realize the dual ionic sensing by constructing CDs-P(MMA-BA-MAA) hybrid microbeads arrays, which broadens the application of optical hybrid microbeads. In addition, we also prepare robust hybrid film and flexible lamp belt. The obtained robust CDs-functionalized PC hybrid microbeads with various attractive optical properties have a broad prospect in optical display, sensors, biological coding and antireflection coatings.
研究领域:
材料科学
·
光学工程
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Miao Kong,Shufen Zhang,Yuang Zhang,Bingtao Tang
With the increase in integration, functionality, and power density of electronic devices, they need visual temperature sensing materials to intuitively monitor local temperature on the surface of electronic components. However, these materials still face challenges in developing reversible optical signal switching and improving visibility in response to external temperature changes. This work introduces free-standing quasi-amorphous arrays with fast structural color rendering behavior and high color visibility for visually specific temperature monitoring. The arrays employ the integration phase change polymers and polysulfide (PSF) microsphere quasi-amorphous arrays, enabling reversible structural color rendering behaviors in response to temperature changes. The PSF microsphere quasi-amorphous arrays exhibit high color visibility, stability against photobleaching, and further suppress interference from observation angles during temperature monitoring. Structural color rendering of different arrays occurs at 10.94 °C, 19.2 °C, 41.3 °C, and 54.1 °C, which is derived from thermally stimulated optical transparency switching in the crystalline region of phase change polymers. Following this principle, the designed visual temperature sensing label achieves reversible color switching between white and structural colors in response to external temperature changes. This label can be used to monitor temperature over a wide temperature range of simulated electronic chips, maintaining excellent stability after 100 cycles. Therefore, free-standing quasi-amorphous arrays offer a technique for reversible temperature-dependent structural color rendering, providing new opportunities for visually specific temperature monitoring.
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
ACS Materials Letters
·
2022
·
IF 11.17
Jiaxin Yin,Xiaoqing Huo,Xiaole Cao,Ruonan Li,Yuxuan Zhou,Tao Jiang,Longfei Wang,Zhiyi Wu,Zhong Lin Wang
Conventional electronic combination lockers are usually constructed with an active password input module, which requires the necessary electrical connections. In this work, a new passive smart electronic password locker based on photoelectric signal conversion is reported. When a ZnS-based mechanoluminescent material is subjected to an external force, the mechanical stimulus is converted into light energy. According to this light-emitting property, we developed an optical signal unit as the password input module of the password locker. Benefiting from the mechanoluminescence properties of the ZnS:Cu and randomly distributable visible light sensor, the electronic password locker key has good concealment and randomness. In addition, the surface coating treatment reduces the risk of fingerprint leakage, thus further improving the security performance of the password locker. This work broadens the application path for ZnS-based mechanoluminescence materials, which provides a novel perspective for practical applications such as a smart home.
研究领域:
材料科学
·
光电技术
·
智能家居技术
·
安全工程
✓ 已验证
DOI
高影响因子
Soft Matter
·
2012
·Vol. 8
·期 18
·4911-4917
·
IF 4.39
Lu Jin,Yuanjin Zhao,Xing Liu,Youli Wang,Baofen Ye,Zhuoying Xie,Zhongze Gu
A novel glucose responsive hydrogel film possessing inverse opal structure and conducting property was developed, based on the principle of enzyme-catalytic redox reaction. The film can report glucose concentration via optical and electrochemical signals, respectively. To fabricate the sensor film, SiO2 crystalline colloidal array was utilized as a sacrificed template to endow the polyacrylamide(PAAm) hydrogel with non-closed-packed inverse opal structure, then conductive polymer (CP) poly(3,4-ethylenedioxythiophene) PEDOT was in situ chemically oxypolymerized to form interpenetrated network (IPN) within the hydrogel. The supporting matrix was activated by partial hydrolysis of amide groups on the backbone, to serve as bonding sites for glucose oxidase (GOx) and ion responsive elements. The changes in the hydrogel microenvironment caused by the catalytic product of glucose induced shrinkage of the hydrogel and a corresponding blue shift of the reflection peak of the film. Meanwhile, the hydrogel acted as a flexible amperometric electrode to sense current change. Linear response upon concentration of glucose ranged from 1 mM to 12 mM. Glucose was exhibited optically and electrically confirming a mutual regulation capacity to achieve better anti-interference performance.
研究领域:
生物材料学
·
传感技术
·
医学工程
✓ 已验证
产品关联
DOI
高影响因子
Device
·
2024
·
IF 0
Ke Chang,Xinna Yu,Wei Ren,Yunyang He,Zhikai Gan,Saiqun Ma,Huanpei Huang,Xianmin Jin,Yafei Zhang,Hui Wang
Semiconductor heterostructures can be used to explore band structures for creating optoelectronic devices. In this work, we demonstrate an all-optical-driven artificial vision system based on a porous silicon heterojunction with in-sensor processing capabilities. The abundant surface states of porous silicon enable light trapping and photoelectric conversion, which allow the sensor to exhibit high sensitivity and detect weak light signals. By utilizing differential optoelectronic signals, the integrated device can perform multiple functions within a single unit, such as in-sensor encoding and trajectory tracking of dynamic optical signals. The neuromorphic vision systems based on this photoelectric retina can perform optoelectronic modulation, trajectory reconstruction, and handwritten text recognition and can emulate functions of the human retina with temporal and spatial resolution. The design strategy here can be used to implement in-sensor processing of dynamic optical signals in machine vision systems.
研究领域:
半导体异质结构
·
光电子器件
·
神经形态视觉系统
·
表面态效应
✓ 已验证
DOI
Frontiers in Chemistry
·
2024
·
IF 3.8
Qi Ding,Fang Wang,Weimin Yang,Xinhe Xing,Hengwei Lin,Liguang Xu,Si Li
Developing highly sensitive and selective detection methods is crucial for environmental and healthcare monitoring. In this study, the chiral and fluorescent signals of L-glutathione-modified gold nanoclusters (L-GSH-Au NCs) were discovered to be responsive to Co2+, which displayed linear correlations with the concentration changes of Co2+. Notably, the chiral signal was more sensitive than the FL signal, whose limit of detection (LOD) was calculated to be 0.37 μM and 3.93 times lower than the LOD obtained with fluorescent signals. Moreover, the chiral signals exhibited unexpectedly high selectivity towards Co2+, effectively avoiding interference from other metal ions and biomolecules. Furthermore, the concentrations of Co2+ in various samples, such as Taihu water, tap water, bottled water, and animal serum, were accurately quantified using the chiral signals of L-GSH-Au NCs without complex pretreatment, with recoveries ranging between 95.64% and 103.22%. This study not only provides an innovative approach for Co2+ detection but also highlights the detection capabilities of chiral signals in complex environments.
研究领域:
分析化学
·
环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Chem
·
2018
·
IF 14.104
Qi Zhang,Si-Jia Rao,Tao Xie,Xin Li,Tian-Yi Xu,Da-Wei Li,Da-Hui Qu,Yi-Tao Long,He Tian
Muscle tissue performs crucial contraction/extension motions that generate mechanical force and work by consuming chemical energy. Inspired by this naturally created biomolecular machine, artificial molecular muscles are designed and synthesized to undertake linear actuation functions. However, most of these muscle-like actuators are performed at large ensembles, while to realize the nanoscale actuation at the single- to few-molecule level remains challenging. Herein, we developed an artificial muscle-like molecular actuator that can reversibly control the proximity of the attached nano-objects, gold nanoparticles, within the single-molecule length level by its stimuli-responsive muscle-like linear contraction/extension motion. The molecular actuation motion is accompanied by an optical signal output resulting from the plasmonic resonance properties of gold nanoparticles. Meanwhile, the thermal noise of the muscle-like molecular actuator can be overcome by integrating the optical signal over a sufficiently long period.
研究领域:
纳米技术
·
分子工程
·
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Yu-Qiong Liu,Xiao-Jie Ju,Xing-Long Zhou,Xiao-Ting Mu,Xiao-Yu Tian,Lu Zhang,Zhuang Liu,Wei Wang,Rui Xie,Liang-Yin Chu
A novel chemosensor is developed for the sensitive and facile detection of trace strontium ions (Sr 2+ ) based on the ion-imprinted hydrogels. With Sr 2+ as the templates, the ion-imprinted hydrogels are synthesized by copolymerizing the ion-responsive units 5'-O-acryloyl-2',3'-O-isopropylidene guanosine (APG) and the thermo-responsive units N -isopropylacrylamide (NIPAM). In the presence of Sr 2+ , APG units can self-assemble to form planar G-quartets via the complexation with Sr 2+ , which are introduced into the gel network during polymerization. Then Sr 2+ templates can be removed by multiple repeated washing. When re-exposed to Sr 2+ , the relaxed G-quartets can recognize Sr 2+ , leading to the weakening of electrostatic repulsion between the four oxygen atoms in the G-quartets and inducing the shrinkage of the hydrogels. In this work, the Sr 2+ -imprinted chemosensors are designed as the grating systems for detecting trace Sr 2+ . Based on the array of hydrogel strings synthesized on a nano-scale, the smart grating systems thus constructed can convert and amplify the Sr 2+ concentration signals to the easily-measurable optical signals . With the Sr 2+ -imprinted hydrogel gratings, trace Sr 2+ (10 -11 M) in an aqueous solution can be detected sensitively. Moreover, the proposed Sr 2+ -imprinted chemosensors can be integrated with other smart systems for developing various detectors with high performance.
研究领域:
分析化学
·
材料科学
·
纳米技术
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Zhixiang Wang,Hui Li,Anqi Qin,Wenxin Zhang,Yuyu Zhang,Jinhao Huang,Fusheng Zhang
While smart textiles promise transformative functionality, their predominant reliance on synthetic polymers continues to pose environmental challenges. Biobased nanocellulose emerges as a promising sustainable alternative, exhibiting intrinsic birefringence, stimulus responsiveness, and versatile compositing capabilities for personalized textile design. Herein, we report durable photonic filaments prepared by photopolymerizing cellulose nanocrystals (CNCs) embedded in a poly(ethylene glycol) diacrylate (PEGDA) matrix. The resulting filaments produce dual optical signals: bright luminescence originating from aggregation-induced emission of PEGDA monomers, and pressure-responsive interference color variations stemming from highly aligned CNC arrangements. The filaments maintain stable luminescent emission after exposure to acid, base, washing, and freeze–thaw cycles. Furthermore, they exhibit high tensile strength (up to 42 MPa), exceptional fatigue resistance, flexibility, stitchability, and embroidery compatibility, enabling seamless integration into textiles without functionality loss. This approach and the multifunctional filaments advance the development of sustainable, aesthetically adaptive textiles for smart wearables and other applications requiring dynamic optical responses.
研究领域:
材料科学
·
纳米技术
·
高分子科学
·
光学
·
智能纺织品
·
可持续化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）