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BASAV PRASAD
19BEC0588
NANO-SENSORS : AN OVERVIEW
DIGITAL ASSIGNMENT – 1
NAME: BASAV PRASAD
REG.NO: 19BEC0588
COURSE: INTRODUCTION TO NANOSCIENCE AND
NANOTECHNOLOGY
COURSE CODE: ECE1006
COURSE FACULTY: MUTHU RAJA S
BASAV PRASAD
19BEC0588
INTRODUCTION
Q. WHAT ARE SENSORS?
A. A sensor is a
transducer that converts a
measurement (a quantity
or parameter) into a signal
that carries information.
Q. WHAT ARE NANO SENSORS?
A. THEY ARE TINY SENSORS IN THE
SIZE OF A FEW NANOMETERS ABOUT
10 TO 100 NANOMETER THEY CAN
DETECT THE PRESENCE OF
NANOMATERIAL OR MOLECULES IN
THAT SIZE AND EVEN SMALLER!
BASAV PRASAD
19BEC0588
TYPES OF NANOSENSORS
BASAV PRASAD
19BEC0588
1. OPTICAL NANOSENSORS :
(PROXIMITY AND AMBIENT LIGHT
SENSORS)
• PROXIMITY SENSORS ARE DESIGNED FOR USE IN
DETECTING THE PRESENCE OF AN OBJECT OR
MOTION DETECTION IN VARIOUS INDUSTRIAL,
MOBILE, ELECTRONIC APPLIANCES AND RETAIL
AUTOMATIONS.
• EXAMPLES OF PROXIMITY SENSOR USAGE
INCLUDE THE DETECTION OF AN OUT-OF-PAPER
CONDITION IN A PRINTER OR A MOBILE PHONE
SCREEN THAT DIMS TO SAVE BATTERY LIFE
WHEN PLACED NEAR A FACE.
• Ambient light sensors provide precise light
detection for a wide range of ambient
brightness and are commonly used in LCD
backlight control in mobile phones, LCD
TV/panel, and notebook applications.
BASAV PRASAD
19BEC0588
BASAV PRASAD
19BEC0588
2. BIOLOGICAL NANOSENSORS:
• Biosensor: analytical device for measurement of a
specific analyte
• biological material + physicochemical
transducer(electrochemical, optical, thermometric,
piezoelectric,magnetic or micromechanical)
• Nanomaterials and nanosensors increase sensitivity
and detection level to pico-, femto-, atto- and even
zepto- scales (10^-12-10^-21) – this facilitates helps
in early disease detection.
• Biomarkers, molecules with a function indicating
physiologic or pathologic state, interact with specific
receptors fixed onto the surface of a biosensor
transducer.
BASAV PRASAD
19BEC0588
3. CHEMICAL NANOSENSORS:
• CHEMICAL SENSORS USUALLY CONTAIN TWO BASIC
COMPONENTS CONNECTED IN SERIES: A CHEMICAL
(MOLECULAR) RECOGNITION (RECEPTOR) AND A
PHYSICOCHEMICAL TRANSDUCER. IN THE MAJORITY
OF CHEMICAL SENSORS, THE RECEPTOR INTERACTS
WITH THE ANALYTE MOLECULES. AS A RESULT, THE
PHYSICAL PROPERTIES ARE ALTERED IN SUCH A WAY
THAT THE APPENDING TRANSDUCER CAN GAIN AN
ELECTRICAL SIGNAL.
Illustration of chemiresistors with receptors, the binding
of bio-molecule with net electrical charges changes the
channel conductance.
BASAV PRASAD
19BEC0588
4. PHYSICAL SENSORS:
• The physical nanosensor sense the environmental
physical change such as:
Force
Acceleration
Flow rate
Mass
Volume
Density
pressure
. CNT FORCE SENSOR NANO IDENTOR

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Nano sensors an overview

  • 1. BASAV PRASAD 19BEC0588 NANO-SENSORS : AN OVERVIEW DIGITAL ASSIGNMENT – 1 NAME: BASAV PRASAD REG.NO: 19BEC0588 COURSE: INTRODUCTION TO NANOSCIENCE AND NANOTECHNOLOGY COURSE CODE: ECE1006 COURSE FACULTY: MUTHU RAJA S
  • 2. BASAV PRASAD 19BEC0588 INTRODUCTION Q. WHAT ARE SENSORS? A. A sensor is a transducer that converts a measurement (a quantity or parameter) into a signal that carries information. Q. WHAT ARE NANO SENSORS? A. THEY ARE TINY SENSORS IN THE SIZE OF A FEW NANOMETERS ABOUT 10 TO 100 NANOMETER THEY CAN DETECT THE PRESENCE OF NANOMATERIAL OR MOLECULES IN THAT SIZE AND EVEN SMALLER!
  • 4. BASAV PRASAD 19BEC0588 1. OPTICAL NANOSENSORS : (PROXIMITY AND AMBIENT LIGHT SENSORS) • PROXIMITY SENSORS ARE DESIGNED FOR USE IN DETECTING THE PRESENCE OF AN OBJECT OR MOTION DETECTION IN VARIOUS INDUSTRIAL, MOBILE, ELECTRONIC APPLIANCES AND RETAIL AUTOMATIONS. • EXAMPLES OF PROXIMITY SENSOR USAGE INCLUDE THE DETECTION OF AN OUT-OF-PAPER CONDITION IN A PRINTER OR A MOBILE PHONE SCREEN THAT DIMS TO SAVE BATTERY LIFE WHEN PLACED NEAR A FACE. • Ambient light sensors provide precise light detection for a wide range of ambient brightness and are commonly used in LCD backlight control in mobile phones, LCD TV/panel, and notebook applications.
  • 6. BASAV PRASAD 19BEC0588 2. BIOLOGICAL NANOSENSORS: • Biosensor: analytical device for measurement of a specific analyte • biological material + physicochemical transducer(electrochemical, optical, thermometric, piezoelectric,magnetic or micromechanical) • Nanomaterials and nanosensors increase sensitivity and detection level to pico-, femto-, atto- and even zepto- scales (10^-12-10^-21) – this facilitates helps in early disease detection. • Biomarkers, molecules with a function indicating physiologic or pathologic state, interact with specific receptors fixed onto the surface of a biosensor transducer.
  • 7. BASAV PRASAD 19BEC0588 3. CHEMICAL NANOSENSORS: • CHEMICAL SENSORS USUALLY CONTAIN TWO BASIC COMPONENTS CONNECTED IN SERIES: A CHEMICAL (MOLECULAR) RECOGNITION (RECEPTOR) AND A PHYSICOCHEMICAL TRANSDUCER. IN THE MAJORITY OF CHEMICAL SENSORS, THE RECEPTOR INTERACTS WITH THE ANALYTE MOLECULES. AS A RESULT, THE PHYSICAL PROPERTIES ARE ALTERED IN SUCH A WAY THAT THE APPENDING TRANSDUCER CAN GAIN AN ELECTRICAL SIGNAL. Illustration of chemiresistors with receptors, the binding of bio-molecule with net electrical charges changes the channel conductance.
  • 8. BASAV PRASAD 19BEC0588 4. PHYSICAL SENSORS: • The physical nanosensor sense the environmental physical change such as: Force Acceleration Flow rate Mass Volume Density pressure . CNT FORCE SENSOR NANO IDENTOR