Resolution in quartz crystal oscillator circuits for high sensitivity microbalance sensors in damping media

Rodríguez-Pardo, L.; Fariña, José; Gabrielli, C.; Perrot, Hubert; Brendel, R.

doi:10.1016/j.snb.2004.04.060

Cited by 71 publications

(35 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Comparison of frequency stabilities between the three piezoelectric sensors (Fig. 2) The resonant frequency of the crystal oscillator plate can maintain stable for a long period in vapor, but is difficult to keep stable in the liquid-phase due to a variety of frequency-interrupting factors, which hampers the application of this sensor during liquid-phase detection (Uttenthaler et al, 2001;Rodriguez-Pardo et al, 2004;Vancura et al, 2007). The quality of the quartz crystal oscillator, a basic component of piezoelectric sensors, can be improved by certain processing techniques.…”

Section: Resultsmentioning

confidence: 99%

Real-time monitoring of the strand displacement amplification (SDA) of human cytomegalovirus by a new SDA-piezoelectric DNA sensor system

Chen¹,

Bian²,

Chen³

et al. 2009

Biosensors and Bioelectronics

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Real-time monitoring of the strand displacement amplification (SDA) of human cytomegalovirus by a new SDA-piezoelectric DNA sensor system

Chen¹,

Bian²,

Chen³

et al. 2009

Biosensors and Bioelectronics

View full text Add to dashboard Cite

“…Consequently, oscillators are taken as alternative for sensor resonance frequency monitoring; the low cost of their circuitry as well as the integration capability and continuous monitoring are some features which make the oscillators to be the most common alternative for high resonance frequency QCM sensors. However, in spite of the efforts carried out to build oscillator configurations suitable for in-liquid applications (Barnes, 1991;Auge et al, 1994Auge et al, , 1995Chagnard et al, 1996;Paul & Beeler, 1998;Rodríguez-Pardo, 2004, 2006Wessendorf, 2001;Benes et al, 1999) the poor stability of high frequency QCM systems based on oscillators has prevented increasing the limit of detection despite the higher sensitivity reported (Rabe et al, 2000;Uttenthaler et al, 2000;Zimmermann et al, 2001;Sagmeister et al, 2009). …”

Section: Instrumentation Techniquesmentioning

confidence: 99%

QCM Technology in Biosensors

Montagut¹,

Narbon²,

Jiménez³

et al. 2011

Biosensors - Emerging Materials and Applications

View full text Add to dashboard Cite

“…At atmospheric pressure, a driven QCM with f 1 = 2 MHz and Q 1 = 8660 was found to have a resolution of 6.7×10 3 pg/cm 2 [89]. A driven SAW has an even greater mass sensitivity, 10 pg/cm 2 [90].…”

Section: Proposed Application: Nanowires As Mass Sensorsmentioning

confidence: 99%

Vibrational spectra of nanowires measured using laser doppler vibrometry and STM studies of epitaxial graphene : an LDRD fellowship report.

Biedermann¹

2009

View full text Add to dashboard Cite

A few of the many applications for nanowires are high-aspect ratio conductive atomic force microscope (AFM) cantilever tips, force and mass sensors, and high-frequency resonators. Reliable estimates for the elastic modulus of nanowires and the quality factor of their oscillations are of interest to help enable these applications. Furthermore, a real-time, non-destructive technique to measure the vibrational spectra of nanowires will help enable sensor applications based on nanowires and the use of nanowires as AFM cantilevers (rather than as tips for AFM cantilevers).Laser Doppler vibrometry is used to measure the vibration spectra of individual cantilevered nanowires, specifically multiwalled carbon nanotubes (MWNTs) and silver gallium nanoneedles. Since the entire vibration spectrum is measured with high frequency resolution (100 Hz for a 10 MHz frequency scan), the resonant frequencies and quality factors of the nanowires are accurately determined. Using Euler-Bernoulli beam theory, the elastic modulus and spring constant can be calculated from the resonance frequencies of the oscillation spectrum and the dimensions of the nanowires, which are obtained from parallel SEM studies. Because the diameters of the nanowires 3 studied are smaller than the wavelength of the vibrometer's laser, Mie scattering is used to estimate the lower diameter limit for nanowires whose vibration can be measured in this way. The techniques developed in this thesis can be used to measure the vibrational spectra of any suspended nanowire with high frequency resolution Two different nanowires were measured-MWNTs and Ag 2 Ga nanoneedles. Measurements of the thermal vibration spectra of MWNTs under ambient conditions showed that the elastic modulus, E, of plasma-enhanced chemical vapor deposition (PECVD) MWNTs is 37±26 GPa, well within the range of E previously reported for CVD-grown MWNTs. Since the Ag 2 Ga nanoneedles have a greater optical scattering efficiency than MWNTs, their vibration spectra was more extensively studied. The thermal vibration spectra of Ag 2 Ga nanoneedles was measured under both ambient and low-vacuum conditions. The operational deflection shapes of the vibrating Ag 2 Ga nanoneedles was also measured, allowing confirmation of the eigenmodes of vibration. The modulus of the crystalline nanoneedles was 84.3±1.0 GPa.Gas damping is the dominate mechanism of energy loss for nanowires oscillating under ambient conditions. The measured quality factors, Q, of oscillation are in line with theoretical predictions of air damping in the free molecular gas damping regime. In the free molecular regime, Q gas is linearly proportional to the density and diameter of the nanowire and inversely proportional to the air pressure. Since the density of the Ag 2 Ga nanoneedles is three times that of the MWNTs, the Ag 2 Ga nanoneedles have greater Q at atmospheric pressures. Our initial measurements of Q for Ag 2 Ga nanoneedles in low-vacuum (10 Torr) suggest that the intrinsic Q of these nanoneedles may be on the order of 1000....

show abstract

Resolution in quartz crystal oscillator circuits for high sensitivity microbalance sensors in damping media

Cited by 71 publications

References 8 publications

Real-time monitoring of the strand displacement amplification (SDA) of human cytomegalovirus by a new SDA-piezoelectric DNA sensor system

Real-time monitoring of the strand displacement amplification (SDA) of human cytomegalovirus by a new SDA-piezoelectric DNA sensor system

QCM Technology in Biosensors

Vibrational spectra of nanowires measured using laser doppler vibrometry and STM studies of epitaxial graphene : an LDRD fellowship report.

Contact Info

Product

Resources

About