Nanoscale
·
2014
·Vol. 7
·期 3
·877-884
·
IF 6.739
Zenghui Wang,Hao Jia,Xuqian Zheng,Rui Yang,Zefang Wang,G. J. Ye,X. H. Chen,Jie Shan,Philip X.-L. Feng
We report on the experimental demonstration of a new type of nanoelectromechanical resonator based on black phosphorus crystals. Facilitated by a highly efficient dry transfer technique, crystalline black phosphorus flakes are harnessed to enable drumhead resonators vibrating at high and very high frequencies (HF and VHF bands, up to ∼100 MHz). We investigate the resonant vibrational responses from the black phosphorus crystals by devising both electrical and optical excitation schemes, in addition to measuring the undriven thermomechanical motions in these suspended nanostructures. Flakes with thicknesses from ∼200 nm down to ∼20 nm clearly exhibit elastic characteristics transitioning from the plate to the membrane regime. Both frequency- and time-domain measurements of the nanomechanical resonances show that very thin black phosphorus crystals hold interesting potential for moveable and vibratory devices and for semiconductor transducers where high-speed mechanical motions could be coupled to the attractive electronic and optoelectronic properties of black phosphorus.
研究领域:
材料科学
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纳米技术
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物理学
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电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Photonics Research
·
2024
·Vol. 12
·期 7
·1542-1547
·
IF 6.6
Zhibo Hou,Zhibo Hou,Liao Chen,Liao Chen,Rongwu Liu,Rongwu Liu,Chi Zhang,Chi Zhang,Xiaojun Wu,Xiaojun Wu,Xinliang Zhang,Xinliang Zhang,Xinliang Zhang
The terahertz (THz) absorption spectrum is a powerful method to identify substances. The improvement focuses on sensitivity and recovery ability. Here, we demonstrate enhanced THz vibrational absorption spectroscopy based on an on-chip THz whispering gallery mode resonator (THz-WGMR). A THz-WGMR with high Q can store energy and enhance the interaction between the THz waves and the target substances to capture the unique absorption fingerprint information. Therefore, it possesses significant sensitivity to identify trace amounts of substances. As a proof of concept, lactose powder and glucose powder are applied to demonstrate the effectiveness of our approach in recovering fingerprint absorption spectroscopy. Compared with a straight waveguide, the high sensitivity of the THz-WGMR is illustrated. The change of the transmissivity caused by the lactose reaches 7.8 dB around 532 GHz for the THz-WGMR, while only 1.4 dB for the straight waveguide, demonstrating the state-of-the-art sensing performance in fingerprint absorption recovery. We believe the proposed integrated THz-WGMR will promote the THz identification of tiny fingerprint substances.
研究领域:
物理学
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光学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Micromachines
·
2018
·Vol. 9
·期 6
·274
·
IF 2.222
Zihao Li,Chenggang Zhu,Zhihe Guo,Bowen Wang,Xiang Wu,Yiyan Fei
The detection of small molecules has increasingly attracted the attention of researchers because of its important physiological function. In this manuscript, we propose a novel optical sensor which uses an optofluidic microbubble resonator (OFMBR) for the highly sensitive detection of small molecules. This paper demonstrates the binding of the small molecule biotin to surface-immobilized streptavidin with a detection limit reduced to 0.41 pM. Furthermore, binding specificity of four additional small molecules to surface-immobilized streptavidin is shown. A label-free OFMBR-based optical sensor has great potential in small molecule detection and drug screening because of its high sensitivity, low detection limit, and minimal sample consumption.Keywords:label-free sensor;optofluidic microbubble resonator;detection of small molecules
研究领域:
生物医学工程
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光学传感
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分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
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2024
·
IF 3.3
Min Ouyang,Jiachang Wu,Xiongjian Huang,Guoping Dong
The photopolymerization method for fabricating silica glass is a rapid, eco-friendly, and flexible technique. However, silica glass prepared via this method has limited solubility for rare-earth ions, making it difficult to achieve laser output with such low luminescence efficiency. Here, Al and P elements are introduced into the silica glass matrix to increase the Yb 3+ doping concentration to 1.2 wt%. It is revealed that the fluorescence intensity of the co-doped silica glass is greatly enhanced, making it more suitable as a laser gain material. A porous glass rod co-doped with Al/P/Yb is fabricated based on the above method, subsequently transforming it into a glass microsphere resonator through treatment with a hydrogen-oxygen flame and CO 2 laser. By pumping with a tapered optical fiber , the output of multi-mode (1033 nm and 1040 nm) lasers is achieved in whispering gallery modes (WGMs) resonator. This technology offers a simpler and more efficient method for fabricating laser microsphere resonators, which holds promise for applications in the field of integrated optics .
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Atta Ullah,Hanxing Liu,Abdul Manan,Arbab Safeer Ahmad,Zhai Pengcheng,Hua Hao,Minghe Cao,Zhonghua Yao,Amjad Ullah,Abdullah Jan,Marwa Emmanuel,Javed Iqbal
The solid-state sintering route was employed for the production of (1-x)Bi 2 (Li 0 .5 Ta 1.5 )O 7 -xTiO 2 (x = 0, 0.02, 0.04, 0.06, 0.08) ceramics. The phase, microstructure and microwave dielectric properties of each ceramic composition were determined via X-ray diffraction, scanning electron microscopy and Haki Colmon resonator technique, respectively. The dielectric constant, tan δ and AC conductivity were also determined for the composition of x = 0.04. The TiO 2 addition developed new phases of Bi 3 Ti 4 O 12 and Bi 3 TaTiO 9 for x = 0.04 along with Bi 2 (Li 0 . 5 Ta 1.5 )O 7 phase which disappeared for x = 0.08. The τ f of Bi 2 (Li 0 . 5 Ta 1.5 )O 7 was tuned through zero by TiO 2 addition and good microwave dielectric properties ε r ~67.2, Q u f õ 13,767 GHz and τ f ~ −1.45 ppm/ ° C can be obtained for the composition of x = 0.04 sintered at 1050 °C for 2 h. This ceramic composition is a suitable candidate for 5G cellular base station resonator application.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Micromachines
·
2016
·Vol. 7
·期 11
·194
·
IF 1.295
Zhixin Zhang,Zifan Tang,Wenpeng Liu,Hongxiang Zhang,Yao Lu,Yanyan Wang,Wei Pang,Hao Zhang,Xuexin Duan
Controlled drug release has a high priority for the development of modern medicine and biochemistry. To develop a versatile method for controlled release, a miniaturized acoustic gigahertz (GHz) resonator is designed and fabricated which can transfer electric supply to mechanical vibrations. By contacting with liquid, the GHz resonator directly excites streaming flows and induces physical shear stress to tear the multilayered polyelectrolyte (PET) thin films. Due to the ultra-high working frequency, the shear stress is greatly intensified, which results in a controlled disassembling of the PET thin films. This technique is demonstrated as an effective method to trigger and control the drug release. Both theory analysis and controlled release experiments prove the thin film destruction and the drug release.Keywords:controlled drug release;layer-by-layer (LbL);bulk acoustic resonator;MEMS
研究领域:
生物医学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Yanpu Chen,Jiaxin Zhao,Yuanjie Yang,Shengran Lin,Peng Wang,Liren Lou,Wei Zhu,Guanzhong Wang
A new method to prepare AlScN/diamond structure was proposed to fabricate high frequency surface acoustic wave (SAW) resonators . The AlScN/diamond structure was prepared by growing a diamond layer on the AlScN surface and removing the Si substrate . Highly c-axis oriented AlScN thin films with 2.37° full width at half maximum (FWHM) on the X-Ray rocking curve of the (002) peak were deposited by reactive ion assisted sputtering. This method solved the problem of high roughness synthetic diamond worsening sputtered AlScN quality without using polishing. A high electromechanical coupling coefficient (K eff 2 ), 4.31 %, was obtained from the 2.77 GHz SAW devices of AlScN/diamond structure, and its insertion loss is 15.46 dB. The AlScN/diamond SAW devices exhibit lower insertion loss and higher K eff 2 in comparison to AlScN/Si devices. The proposed AlScN/diamond structure fabrication process showed a feasibility of mass production of high frequency SAW resonators with excellent performance.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Zhaoyu Wang,Mingyu Li,Xin Chen,Kaihao Zhao,Jiamei Gu,Jian-Jun He,Qiu-Shun Li,Wen-Fei Dong
Silicon-based optical biosensors have garnered significant interest since their inception. They are, however, susceptible to temperature fluctuations in a controlled environment. In order to address this issue, we provide a solution including the utilization of a silicon-on-insulator (SOI) cascaded micro-ring resonators (CMRR) biosensor that is designed to be insensitive to temperature changes. It consists of two ring resonators exposed to the reference solution and analyte, respectively, their radius and waveguide width are designed to meet the temperature - insensitivity criterion of the CMRR sensor. The results of experiments indicate that by real-time monitoring of the envelope peak drift in the transmission spectrum of the sensor, the bulk refractive index (RI) sensitivity is 2940.71 nm/RIU, the limit of detection (LOD) is 3.1×10 −5 RIU, and the temperature sensitivity is less than 40 pm/℃. Furthermore, the sensor was applied for HSA detection, with a calculated LOD of 18.09 ng/mL. The effect of temperature on HSA detection is much smaller than that of a CMRR sensor without athermal design. The sensor demonstrates high sensitivity and temperature insensitivity, and the absence of negative thermo-optic coefficient materials or supplementary temperature control mechanisms simplifies its practical applications. It can be made by a large array to detect different type protein molecules for high throughput multiparameter analysis.
研究领域:
生物医学工程
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光学传感
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分子检测
✓ 已验证
产品关联
DOI
高影响因子
Photoacoustics
·
2024
·
IF 7.1
Taige Li,Pengcheng Zhao,Peng Wang,Kummara Venkata Krishnaiah,Wei Jin,A. Ping Zhang
Photoacoustic spectroscopy (PAS) gas sensors based on optomechanical resonators (OMRs) have garnered significant attention for ultrasensitive trace-gas detection. However, a major challenge lies in balancing small size with high performance when developing ultrasensitive miniaturized optomechanical resonant PAS (OMR-PAS) gas sensors for space-constrained applications. Here, we present a miniature optical fiber PAS gas sensor based on a planar-spiral spring OMR (PSS-OMR) that is in situ 3D micro-printed on the end-face of a fiber-optic ferrule. Experimental results demonstrate that mechanical vibrational resonance can enhance the sensor's acoustic sensitivity by over two orders of magnitude. Together with a 1.4 μL non-resonant photoacoustic cell, it can detect C 2 H 2 gas concentration at the 45-ppb level, and its response is very fast approximating 0.2 seconds. This optical fiber OMR-PAS gas sensor holds great promise for the detection or monitoring of rapidly varying trace gas in many applications ranging from production process control to industrial environmental surveillance.
研究领域:
传感技术
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光学工程
·
环境监测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Quanquan Guo,Xiaoyu Wu,Xuexin Duan,Shan He,Wei Pang,Yanyan Wang
Here, we present a high performance uncooled near-infrared (NIR) detector comprising of a giga hertz (GHz) solidly mounted resonator (SMR) and gold nanorods (GNRs) arrays. By coupling the localized surface plasmon resonances of GNRs, the resonator system exhibits optimized optical response to vis-NIR region. Both simulation and experiments demonstrate the hybrid GNRs-SMR exhibit significantly enhanced optical responsive sensitivity of NIR, the tunable aspect ratios (AR) of GNRs enable resonator respond sensitively to selected light. Specially, taking advantage of the acoustofluidic effect of SMR, the GNRs can be controllably and precisely modified on the microchip surface in an ultra-short time, which addresses one of the most fundamental challenges in the localized functionalization of micro/nano scale surface. The presented work opens new directions in development of novel miniaturized, tunable NIR detector.
研究领域:
光学
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材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2018
·Vol. 51
·期 5
·055104
·
IF 2.373
Wei Wang,Da Chen,Hongfei Wang,Wenhua Yu,Maozeng Wu,Lei Yang
Trace formaldehyde vapor was detected by a micron-scale AlN film bulk acoustic resonator based on mass-sensitive mechanism. The layer-by-layer carbon nanotubes/polyethyleneimine multilayers were assembled on the resonator surface as the sensitive coating. An almost linear decrease of the resonant frequency was observed as a function of the number of nanotubes/polyethyleneimine periods. The multilayers showed a random and porous structure and thus provided a large specific surface area for gas adsorption and diffusion. At the same time, the amine groups in polyethyleneimine had an strong affinity to formaldehyde with excellent selectivity. When exposed to gaseous formaldehyde, the attachment of gas molecules induced a small decrease in the resonant frequency, which made the sensor easily detect formaldehyde at ppb levels with 1 min response time. A linear relationship was observed between the formaldehyde concentrations and the frequency downshift of the resonator. The layer number had an obvious influence on the absorption/desorption behavior of formaldehyde. The gas sensitivity of FBAR sensors was 1.29–1.90 kHz ppb−1 with the limit of detection of 24–38 ppb.
研究领域:
材料科学
·
传感器技术
·
环境监测
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Hemi Qu,Yang Yang,Ye Chang,Zifan Tang,Wei Pang,Yanyan Wang,Hao Zhang,Xuexin Duan
On-chip integrating several functional components for developing integrated lab-on-a-chip microsystem remains as a challenge. In this work, by employing multiple microelectromechanical resonators both as actuators and sensors, on-chip heating, mixing and chemical reaction monitoring are successfully demonstrated. Mechanism studies using COMSOL simulations indicate that the local heating and mixing are induced by the acoustic wave attenuation during its transmission in liquid. On-line chemical reaction monitoring is realized by viscosity sensing using the same resonator through impedance analysis. Classic Diels-Alder reaction in a single droplet was performed to verify the feasibility of using such microsystem for mixing, heating and online reaction monitoring at microscale.
研究领域:
微流控技术
·
生物医学工程
✓ 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）