
Alexander Anton AltmannTechnical University of Darmstadt | TU · Department of Electrical Engineering and Information Technology (Dept.18)
Alexander Anton Altmann
Master of Science
Research Associate
About
27
Publications
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Introduction
Flexible sensors based on additively manufactured ferroelectrets and their human applications; 3D printing and manufacturing of functional materials for use as sensors
Skills and Expertise
Publications
Publications (27)
The temporomandibular joint (TMJ) is one of the most complex joints in the human body, but its biomechanics have not been as extensively researched as other body joints, leading to a fundamental gap in understanding the physiological characteristics and diagnostics of related disorders. This work introduces a measurement system that applies a preci...
Piezoelectret metamaterials are a kind of piezoelectrets with distinctive properties such as negative Poisson's ratio and positive piezoelectric d31 coefficient. These materials hold significant promise for applications in sensing and mechanical energy harvesting. In this article, flexible piezoelectret metamaterials with a simple double-V cell str...
Rotational energy harvesters have emerged as a
promising solution for sustainable power generation in a
variety of applications, ranging from small-scale devices to
large-scale industrial systems. In this work, we present a
fully 3D-printed electret rotational harvester based on the
biodegradable and compostable polymer polylactic acid
(PLA). The 3...
In view of the global ecosystem crisis resulting from the ubiquitous electronic waste (e and plastic waste), the
engineering of advanced electronic devices from sustainable materials is gaining considerable attention.
Nevertheless, the development of advanced, maybe even degradable electronics with comparable or even
improved functionality remains...
Flexible sensors based on ferroelectrets can utilize
the full potential of the widely adopted 3D printing process,
capitalizing on its accessibility, freedom of design, and range of
materials. However, 3D printing faces limitations in accuracy and
poor surface quality for small dimensions, particularly constraining
the ability to manufacture precis...
Electromyography (EMG) is a crucial technique for measuring muscle activity and is regularly used in motion detection and diagnostics.
When applied to small muscles and integrated into devices such as prostheses or force measurement systems, conventional electrodes often fail to meet space and usability requirements. While conductive filaments have...
Air-coupled ultrasonic transducers are widely used
in non-destructive testing, acoustical sonar systems, and biomedical
imaging. These applications require transducers that operate
effectively across a broad acoustic frequency spectrum,
offer adaptable geometric designs, and increasingly incorporate
eco-friendly materials. In this work, we present...
Detecting human movement is crucial for the control of lower limb wearable robotics designed to assist daily activities or rehabilitation tasks. Sensorized insoles present a viable option for extracting control inputs, such as gait events and the corresponding phases, essential for regulating the magnitude and timing of assistance. Given their high...
The development of smart wearables, involving the
sensor integration into textiles, has emerged in several applications,
such as heart rate monitoring in healthcare contexts, smart
insoles for gait analysis, or gesture recognition for virtual reality
interfaces. A common challenge in this field is the incorporation
of off-the-shelf sensors, which a...
A theoretical model has been developed to express the longitudinal and transverse piezoelectric effects in ferro/piezoelectrets. This model is an extension of the classic model based on layer-dielectric structures that focuses on the longitudinal piezoelectric effect. The improved model reveals that the relation between the longitudinal piezoelectr...
In recent years, the demand for sustainable and degradable materials and electronic devices has increased significantly. Among a range of biodegradable polymers, poly(lactic acid) (PLA) is a good alternative to conventional petrol-based polymers because of its attractive mechanical properties and its easy processability. Recently, PLA has also been...
Abstract—The development of piezoelectric sensors using ferroelectrets is a very active field that is increasingly gaining
importance. Recently, 3D-printing ferroelectret sensors using
fused deposition modeling technique has been extensively investigated due to its unparalleled advantages in terms of design
flexibility and cost-effectiveness. Never...