Duffing harmonic oscillator is a common model for nonlinear phenomena in science and engineering. This paper presents He´s Energy Balance Method (EBM) for solving nonlinear differential equations. Two strong nonlinear cases have been studied analytically. Analytical results of the EBM are compared with the solutions obtained by using He´s Frequency Amplitude Formulation (FAF) and numerical solu...

Self-Driving Fluidic Micro-Processors In article number 2200017, Milad Abolhasani and co-workers present a self-driving lab using artificial intelligence-guided fluidic blocks for accelerated fundamental applied studies of emerging clean energy materials. Autonomous doping metal halide perovskite quantum dots is demonstrated as material testbed this lab.

In this paper, we emphasize our long series of experiments proving that the physical processes along fluid interfaces can be exploited for creating unusual fluidic objects. We report for the first time a couple of new fluidic objects so-called “liquid onions” and “mayonnaise” droplets. The study starts from the observation of antibubbles, exhibiting unstable liquid–air–liquid interfaces. We sho...

Two methods of attaching fluidic interconnects are presented. By using gold to gold fusion bonding and copper to gold fusion bonding, micro-scale tubes are attached to a MUMPS fabricated fluidic channel. The fusion bonding is done by resistively heating a gold layer on top of the poly 2 layer, so that the gold melts. A range of different heater geometries is presented. The tensile and shear str...

ABSTRACT This paper proposes a new valveless pump using a PZT diaphragm to create a gas jet flow for fluidic applications. The pump was designed and simulated based on transient fluidic analysis with experimental result of PZT diaphragm so that the features of micropump are reliably predicted. The experimental results of a PMMA prototype confirmed the performance of the pump. The fabrication pr...

Based on the optical deflection method, the resonant characteristics of a microcantilever under various pressure have been observed at room temperature to understand the pressure-dependent dissipation effect. Especially, the quality factor of the cantilever has been measured for up to fourth harmonic mode of cantilever resonance as a function of pressure between 0.1 and 1000 Torr. By considerin...

This work presents patterning of thick (10–50 μm) hybrid polymer structures of ORMOCER by laser direct writing. ORMOCER combine polymer-like fabrication processes with glass-like surface chemistry that is beneficial for many bio-microfluidic applications. ORMOCER is liquid before exposure, so patterning is done by contact-free lithography, such as proximity exposure. With laser direct writing, ...

The paper describes a concept of innovative assistive motion therapy devices with new patent pending fluidic actuators. The main novelty of these soft actuators is the rotary fluid motor with elastic chambers (REC), which produces rotational motion without any additional transmission elements. The key actuator features as inherent compliance, high back-driveability and light-weight design build...

The dynamics of flow-induced translocation of polymers through a fluidic channel has been studied by dissipative particle dynamics (DPD) approach. Unlike implicit solvent models, the many-body energetic and hydrodynamic interactions are preserved naturally by incorporating explicit solvent particles in this approach. The no-slip wall boundary and the adaptive boundary conditions have been imple...

Utilizing a simple fluidic structure, we demonstrate the improved performance of oxidase-based enzymatic biosensors. Electrolysis of water is utilized to generate bubbles to manipulate the oxygen microenvironment close to the biosensor in a fluidic channel. For the proper enzyme reactions to occur, a simple mechanical procedure of manipulating bubbles was developed to maximize the oxygen level ...