Nanosensor Fabrication
Nanosensor Fabrication - Related Videos
03:08
Detecting Bacterial Contamination Using Magneto-fluorescent Nanosensors
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2025
This video demonstrates a technique to detect bacterial contaminants in food and water samples using nanosensors. The target pathogenic bacteria are detected through a combination of magnetic relaxation and fluorescence emission modalities.
09:04
Foodborne Pathogen Screening Using Magneto-fluorescent Nanosensor: Rapid Detection of E. Coli O157:H7
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Cited by 14 •
2017
The overall goal of this protocol is to synthesize functional nanosensors for the portable, cost-effective, and rapid detection of specifically targeted pathogenic bacteria through a combination of magnetic relaxation and fluorescence emission modalities.
10:50
Nanosensors to Detect Protease Activity In Vivo for Noninvasive Diagnostics
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Cited by 9 •
2018
Proteases are tightly regulated enzymes involved in fundamental biological processes, and dysregulated protease activity drives progression of complex diseases such as cancer. This method's goal is to create nanosensors that measure protease activity in vivo by producing a cleavage signal that is detectable from host urine and discriminates disease.
07:36
Fabricating Nanogaps by Nanoskiving
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Cited by 3 •
2013
The fabrication of electrically addressable, high-aspect-ratio (> 1000:1) metal nanowires separated by gaps of single nanometers using either sacrificial layers of aluminum and silver or self-assembled monolayers as templates is described. These nanogap structures are fabricated without a clean room or any photo- or electron-beam lithographic processes by a form of edge lithography known as nanoskiving.
05:40
Fabricating Cotton Analytical Devices
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2016
To investigate simple fabrication approaches for multiple assay needs, we created a fluid-absorbing channel system made of cotton material. This device was used to establish a multiple detection platform, and solve contamination issues that commonly affect lateral flow-based biomedical devices, for clinical urinalysis of nitrite, total protein, and urobilinogen.
FAQs
The recognition interface provides the binding site for a selected chemical or biological target, while the transducer converts that interaction into a measurable electrical, optical, or mechanical signal. Fabrication must therefore preserve both functions: the interface needs suitable selectivity, and the transducer must respond detectably to binding. Their integration determines whether target recognition produces useful sensor output.
Lithography defines nanoscale geometries and structures, thin-film deposition builds controlled material layers, nanomaterial assembly organizes nanoscale components, and surface functionalization prepares the recognition interface. These methods address different parts of the sensor architecture rather than serving identical purposes. Combining them allows researchers to coordinate physical structure, material properties, target binding, and signal generation within one device.
Nanoscale geometry and material properties influence how the sensor interacts with targets and how strongly that interaction is converted into a signal. Surface functionalization contributes selectivity by shaping the recognition interface, while the fabricated structure and chosen materials affect transduction. Controlling these variables helps distinguish the intended chemical or biological signal from less informative responses.
The readout modality determines how target binding becomes observable: an electrical system reports an electrical change, an optical system reports an optical change, and a mechanical system reports a mechanical response. These are alternative transduction routes within fabricated nanosensors. Selecting among them depends on how the recognition interface, nanoscale structure, and readout platform are integrated for the intended measurement.
A workflow begins by designing the nanoscale structure and selecting the recognition and transduction functions. Fabrication can then combine lithography, thin-film deposition, and nanomaterial assembly, followed by surface functionalization to create the target-binding interface. Finally, the sensor must be integrated with sampling and readout platforms so that biological or chemical interactions can be measured in a usable form.
A fabricated sensor cannot provide practical measurements through its nanoscale structure alone. Integration with sampling platforms connects the device to the chemical or biological material being analyzed, while readout integration makes the transducer response accessible as an electrical, optical, or mechanical signal. This system-level step supports reliable analysis of biomolecules, pathogens, and cellular changes.
In bioengineering, these sensors can support biomolecule detection, pathogen detection, disease monitoring, and analysis of cellular changes. Their nanoscale architecture and functionalized surfaces are relevant when researchers need sensitive measurements from biological systems. When combined with appropriate sampling and readout platforms, they can also contribute to real-time diagnostics and monitoring of biological processes.