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 石英晶体微天平 Quartz Crystal Microbalance(QCM)
  • 石英晶体微天平 Quartz Crystal Microbalance(QCM)
  • 石英晶体微天平 Quartz Crystal Microbalance(QCM)

    参考价格: ¥0.00
    产品型号:石英晶体微天平 Quartz Crystal Microbalance(QCM)
    所在地区:上海
    上架时间:2012年08月01日
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    仪器介绍

    Q-Sense D300 is the system of choice to get detailed information about
    complex surface chemistry or biology. When you need to know how 
    molecules adsorb to a chosen surface or need to examine the difference
    between two very similar approaches for a polymer-based biomaterial, 
    the QCM-D technique provides crucial information about mass and 
    structural changes taking place at the surface.  Q-Sense D300 is a 
    complete system including support, software and hardware. 
    It is flexible and may be customized to handle for example flow 
    measurements. Real time analysis Reactions are followed as they 
    happen. Every second multiple frequency and dissipation data are 
    acquired which are related to mass and viscoelastic changes of 
    layer/layers adsorbing to or desorbing from the sensor.  
    High sensitivity The maximum sensitivity is 1 ng/cm2 allowing studies
    of molecules with Mw below 500 Dalton (depending on surface coverage).
    Structural changes can be studied in great detail as well.  
    Flexible choice of surface Since QCM-D is an electro-mechanical 
    method any surface can be used if it can be coated as a thin (<10 µm)
    homogeneous film on top of the sensor electrodes.  
    Viscoelastic properties The included software, QTools,enables 
    accurate estimations of thickness and viscoelastic properties even
    for soft films based on multi-frequency (5, 15, 25 and 35 MHz)
    data achieved with the Q-Sense D300.

    主要特点

    FREQUENCY AND DISSIPATION CHARACTERISTICS
    Frequency range 1-42 MHz Frequency resolution 0.01 Hz
    Mass resolution 1,8 pg / mm2 or 0,18 ng/cm2
    using Sauerbrey relation for a 5 MHz crystal
    Dissipation resolution 1x10-9 Active sensor area 7 mm2
    Measurement conditions 1 datapoint / 5 seconds, 20-37 °C,
    water Smallest detectable change in f* 0.05 Hz corresponding to 0.9 ng/cm2 (9 pg/mm2)
    Smallest detectable change in D* 0.04 x 10-6
    Measurement conditions: 4 datapoints / second, 20-37 °C, water Smallest detectable change in f* 0.2 Hz, corresponding to 3.5 ng/cm2 (35 pg/mm2)
    Smallest detectable change in D* 0.1 x 10-6 * As comparison, binding of Myoglobin, a small globular protein (Mw 17.8 kD) that forms a rigid monolayer, gives a frequency response of 10 Hz and a Dissipation of 0.2 x 10-6. Mefp-1,
    an elongated protein (Mw 120 kD) forming a soft structure, has a corresponding dissipation of ~ 12 x 10-6 and a frequency response of 60 Hz.
    Max load - 0.1 mg/cm² Max film thickness - 10 µm (depending on the viscoelastic properties of the material)

    技术参数

    QSoft 301 Operating system Windows 98/ME/NT/2000/XP Interface Parallel port on any regular PC (optimised for Dell)
    Maximum output rate, 1 frequency - 15 data points per second Normal rate, low noise, 4 frequencies - 4 data points per second and frequency (5, 15, 25 and 35 MHz) QTools Viscoelastic models incorporated Voight/Maxwell for frequency and dissipation response of applied films Picture formats Bitmap, Metafile, Enhanced Metafile, JPEG Input data Frequency and dissipation data from min. 2, preferable ≥3 frequencies
    Output data Modeled values of density, shear modulus, viscosity and thickness