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We report a flexible self-generated triboelectric microfluidic sensor based on liquid-solid triboelectrification and electrostatic induction mechanism. The flexible microfluidic sensor can be conformally attached on curved surfaces and work under two sensing modes - triboelectric single electrode mode and interdigital (IDT) electrode mode. The microfluidic sensor has linear force sensing range up...
There are established macroscale fabrication methods to create parts of virtually any shape or size; but for components in the microscale range (thousands to tens of microns) there is a dearth of options for making 3D parts at high enough throughput to make them practical. This paper demonstrated a novel method to create novel micromolding processes that are capable of creating defect-free microscale...
We describe a new concept to encode information in magnetic films that goes beyond the conventional way of digital magnetic recording. In our approach the information is stored via a continuous variable, namely the remanent coupling angle between two magnetic films that are separated by a nonmagnetic spacer layer. Using the technique of nuclear resonant scattering (NRS) [1, 2] we show with good precision,...
This study reported an integrated microfluidic system for automating multiplex detection of allergy microarrays. Allergy has become a common disease worldwide. However, detection for allergy on microarrays requires tedious manual operation, well-trained technicians and a relatively labor-intensive process. In this study, an integrated microfluidic system combining the microfluidic techniques and the...
A novel parallel plate capacitive tactile sensor design has been proposed which for the same deflection of the top electrode shows manifold improvement in sensitivity over present designs. Using a dielectric droplet leads to a simultaneous change in the capacitance area and gap leading to enhanced sensitivity. The proposed design is validated through modelling and experiments.
In this paper, we present a microfluidic chip-based method for high-throughput formation and long-term culture of embryoid bodies (EBs). The microfluidic chip is designed to be a stand-alone device whose operation can be performed by a manual pipette, making it easy to use in a regular biology laboratory setup. We show that uniform-sized mouse EBs can be formed after 1 day of culture in the microfluidic...
Derivation of a steady state and dynamic model of direct electron transfer of the bioanode utilized in a self-powered glucose biosensor (SPGS) is described. The bioanode comprises of dense network of multi-walled carbon nanotubes (MWCNTs) functionalized with pyrroloquinoline quinone dehydrogenase (PQQ-GDH) to oxidize glucose substrate. The model is based on detail charge and mass balances for several...
Nano device based DNA sequencing has the advantage of speed and cost when compared to the conventional Sanger methods. In this report, we demonstrate an AFM assisted DNA sequencing method that combines precision single molecule manipulation with a nanowire sensor to measure the transient tunneling current of a translocating DNA molecule. In experiment, a 7-µm long λDNA molecule was first identified...
As IC technologies continue scaling down, traditional electrostatic discharge (ESD) devices can no longer meet the demands of modern protection, prompting the need for novel device structures. A novel and unique approach to ESD protection using suspended graphene ribbon devices is presented. It has been demonstrated the ribbon's electro-mechanical response to a sudden surge of charge, such as an ESD...
Herein a system capable of simultaneously sensing glucose and harvesting sufficient energy to power a digital device is presented. This system is powered by an enzymatic glucose biofuel cell consisting of pyroloquinoline quinone glucose dehydrogenase (PQQ-GDH) modified bioanode and bilirubin oxidase modified biocathode. The electrical parameters from a single biofuel cell were amplified to 1.4 V using...
On behalf of the organizing committee, we would like to welcome everybody to the 12th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems (IEEE-NEMS 2017)! IEEE-NEMS is a premier conference series established by the IEEE Nanotechnology Council to promote advanced research and development activities in MEMS, nanotechnology, and molecular systems. The first IEEE-NEMS...
We present a pressing and punching method for a highly nanolaminate metal-insulator structure as a simple and cost-effective fabrication technique. The proposed nanolaminate metal-insulator structure is suitable for a magnetic core of a solenoid inductor. Cobalt-Nickel-Iron as a soft magnet metal was deposited on a polyethylene film which serves as an insulator. The Cobalt-Nickel-Iron bearing polymer...
A novel process for self-assembly of metal-porphyrins on oxide dielectrics is developed and utilized for continuous work function tuning. Simply by changing the central metal atom present at the core of porphyrin helps change the dipole moment at the metal-dielectric interface leading to change in work function. Further the development of vapor phase process makes the process of the self-assembly...
Photonic crystals have been widely used in various fields, however, it is still challenging to employ photonic crystals for in vivo application due to the poor biocompatible and biodegradable properties. In this work, we fabricated inverse opal beads based on biocompatible and biodegradable chitosan. Not only these chitosan-based inverse opal beads exhibited hollow structure together with a uniform...
In this paper, we present the theoretical analysis and calculation results for characterization of a graphene diaphragm applied for capacitive ultra-low pressure sensor structure, where a few layers of graphene diaphragm with radius of 8 µm and total thickness of 2 nm, the graphene diaphragm is suspended over a circular cavity. In this paper, the graphene film was fabricated by an atmospheric-pressure...
This paper proposes the design of a compliant constant-force gripper mechanism for manipulating biological objects. It can avoid the damage induced by excessive drive displacement during the manipulation. A zero-stiffness mechanism is realized by connecting the negative-stiffness mechanism and positive-stiffness mechanism in parallel. The negative stiffness is obtained by a bistable beam mechanism...
We report a novel microfluidic-based high-throughput electrorotation flow cytometer for label-free single-cell analysis in continuous flows. This is realized by a heterogeneously integrated microfluidic channel with electrodes for high precision 3D single stream focusing and electrorotation of cells in high speed flows. This device provides 4 orders of magnitude higher throughput than prior electrorotation...
Monotonic scaling-down of CMOS integrated circuit (IC) technologies is rapidly approaching to its physical end, yet advances in ICs will continue. Instead of one-dimensional (1D) scaling dawn, one apparent solution is lateral integration of heterogeneous devices in 3-dimensional (3D) fashion, which opens great opportunities to make more complex Si-based microsystems for unlimited applications well...
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