Utilizing photothermally induced oscillation damping parameters for the determination of bacterial load suspended in microfluidic resonators

Albrithen, Hamad; Alzahrani, Khalid E.; Assaifan, Abdulaziz K.; Braim, Mona; Alshammari, Abeer; Alodhayb, Abdullah

doi:10.1016/j.jksus.2022.102090

Cited by 1 publication

(1 citation statement)

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“…The frequency measurements of the microcantilevers were recorded by the Picomeasure PM3 system (FOURIEN, CANDA) [ 29 , 30 ]. As demonstrated in Figure 2 , a laser beam is focussed on the free end of the microcantilever.…”

Section: Methodsmentioning

confidence: 99%

Microelectromechanical system‐based biosensor for label‐free detection of human cytomegalovirus

Alzahrani

Assaifan

Al‐Gawati

et al. 2022

IET Nanobiotechnology

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The human cytomegalovirus (HCMV) is an asymptomatic common virus that is typically harmless, but in some cases, it can be life threatening. Thus, there is an urgent need to develop novel diagnostic methods and strengthen the efforts to combat this virus. A microcantilever-based biosensor functionalised with the UL83-antibody of HCMV (UL83-HCMV antibody) has been developed to detect the UL83-antigen of HCMV (UL83-HCMV antigen) at different concentrations ranging from 0.3 to 300 ng/ml. The response of the biosensor to the presence of UL83-HCMV antigen was measured through the shift in resonance frequency before and after antigen-antibody binding. The system shows a low detection limit of 84 pg/ml, which is comparable to traditional sensors, and a detection time of less than 15 min was achieved. The selectivity of the sensor was demonstrated using three different proteins with and without the UL83-HCMV antigen. The biosensor shows high selectivity for the UL83-HCMV antigen. Mass loading by the UL83-HCMV antigen was roughly estimated with a sensitivity of ~30 fg/Hz. This technique is crucial for the fabrication of portable and low-cost biosensors that can be used in real-time monitoring and enables early medical diagnosis.

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Section: Methodsmentioning

confidence: 99%