Results 171 to 180 of about 594,359 (210)
Real-time <i>in Vivo</i> monitoring of photosynthesis in individual leaves by frequency-locked quartz-enhanced photoacoustic spectroscopy. [PDF]
PhotoacousticsLiu S +5 more
europepmc +1 more source
Some of the next articles are maybe not open access.
Related searches:
Related searches:
Biosensors and Bioelectronics, 2002
The use of quartz tuning forks for biosensor applications is investigated. The basis of the sensor is to coat the tuning fork surfaces with specific biomolecules and measure subsequent mass loading from the selective binding of complementary analytes. Two experimental set-ups are evaluated, direct mechanical excitation and self-excitation.
Xiaodi Su
exaly +3 more sources
The use of quartz tuning forks for biosensor applications is investigated. The basis of the sensor is to coat the tuning fork surfaces with specific biomolecules and measure subsequent mass loading from the selective binding of complementary analytes. Two experimental set-ups are evaluated, direct mechanical excitation and self-excitation.
Xiaodi Su
exaly +3 more sources
Improved Tuning Fork for Terahertz Quartz-Enhanced Photoacoustic Spectroscopy [PDF]
Sensors, 2016 We report on a quartz-enhanced photoacoustic (QEPAS) sensor for methanol (CH3OH) detection employing a novel quartz tuning fork (QTF), specifically designed to enhance the QEPAS sensing performance in the terahertz (THz) spectral range. A discussion of the QTF properties in terms of resonance frequency, quality factor and acousto-electric transduction ...
Harvey E. Beere +2 more
exaly +5 more sources
Journal of Low Temperature Physics, 2007
Use of a quartz tuning fork for precise measurements of density has been studied in normal 3He liquid and in 4He liquid and vapor, spanning a reasonably wide range of fluid densities. It is evident that the compressibility of the fluid must be accounted for in order to properly interpret the resonator response.
E. M. Pentti +3 more
openaire +1 more source
Use of a quartz tuning fork for precise measurements of density has been studied in normal 3He liquid and in 4He liquid and vapor, spanning a reasonably wide range of fluid densities. It is evident that the compressibility of the fluid must be accounted for in order to properly interpret the resonator response.
E. M. Pentti +3 more
openaire +1 more source
Quartz tuning fork based microwave impedance microscopy
Review of Scientific Instruments, 2016Microwave impedance microscopy (MIM), a near-field microwave scanning probe technique, has become a powerful tool to characterize local electrical responses in solid state samples. We present the design of a new type of MIM sensor based on quartz tuning fork and electrochemically etched thin metal wires. Due to a higher aspect ratio tip and integration
Yong-Tao Cui, Eric Yue Ma, Zhi-Xun Shen
openaire +2 more sources
A high sensitivity quartz tuning fork temperature sensor
2009 4th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, 2009In this paper, a highly sensitive temperature sensor based on quartz tuning fork resonators is reported. The temperature sensor is configured by ZY (110°/10°) Cut quartz crystal wafer based bulk acoustic wave (BAW) tuning fork resonators whose operating frequency is at 31 KHz.
Jun Xu, Bo You, Xin Li, Jing Ma
openaire +1 more source
Effective stiffness of qPlus sensor and quartz tuning fork
Ultramicroscopy, 2014Quartz tuning forks (QTFs) have been extensively employed in scanning probe microscopy. For quantitative measurement of the interaction in nanoscale using QTF as a force sensor, we first measured the effective stiffness of qPlus sensors as well as QTFs and then compared the results with the cantilever beam theory that has been widely used to estimate ...
Jongwoo Kim +4 more
openaire +2 more sources
THE TUNING-FORK ROOTS OF THE QUARTZ CLOCK
2023Abstract The chapter explores the development of new exact tuning-fork frequency-measuring standards useful for the novel range of radio communication during WWI and its aftermath, and the construction of the first electronic clock required to monitor the accuracy of such a standard.
openaire +1 more source
Clamp-type quartz tuning fork enhanced photoacoustic spectroscopy
Optics Letters, 2022In this Letter, clamp-type quartz tuning fork enhanced photoacoustic spectroscopy (Clamp-type QEPAS) is proposed and realized through the design, realization, and testing of clamp-type quartz tuning forks (QTFs) for photoacoustic gas sensing.
Qian Wu +12 more
openaire +3 more sources
Automatic assembly of quartz tuning fork and microcantilever
2012 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM), 2012Conventional atomic force microscopes (AFMs) detect microcantilever deflection using an optical lever system. However, the complex mechanism of the optical lever system and the alignment of the laser spot on the microcantilever prevent such AFM systems from scanning large samples. AFM systems using a quartz tuning fork (QTF) as a force sensor have been
Chiao-Hua Cheng +3 more
openaire +1 more source