HORTICULTURE

HORTICULTURE SCIENCE

APPLICATION OF NANO TECHNOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How would a MEMS device, which uses a cantilever, detect target molecules?
A
by monitoring the frequency of oscillations
B
by monitoring the length of the cantilever
C
by the color of the cantilever
D
by the thickness of the cantilever
Explanation: 

Detailed explanation-1: -4 Cantilever-based sensors. Microcantilever devices can behave as chemical, biological, or physical sensors by detecting the variations in the vibrational or bending frequency of the cantilever. The change in frequency occurs due to the adsorption of specific analyte mass at its surface.

Detailed explanation-2: -Cantilevered beams are the most ubiquitous structures in the field of microelectromechanical systems (MEMS). An early example of a MEMS cantilever is the Resonistor, an electromechanical monolithic resonator. MEMS cantilevers are commonly fabricated from silicon (Si), silicon nitride (Si3N4), or polymers.

Detailed explanation-3: -MEMS cantilevers are also employed for detecting biological, physical, and chemical particles and can be utilized as sensors and memory storage components. Microcantilever and microbeam structures are typically useful transducer components employed for measuring diverse physical phenomena.

Detailed explanation-4: -A cantilever is a simplest mechanical structure, which is clamped at one end and free at the other end. MEMS cantilever sensor works based on the mechanical deformation of the structure, or in other words the deflection of membrane or beam structure.

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