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Special Issue "Carbon Nanotube and Graphene-based Sensors"

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Physical Sensors".

Deadline for manuscript submissions: closed (30 December 2020) | Viewed by 3195

Special Issue Editors

Department of Aerospace Materials and Processes, Universidad Politecnica de Madrid, 28040 Madrid, Spain
Interests: composite materials; structural health monitoring; fiber optic sensors; smart structures; aerostructures
Special Issues, Collections and Topics in MDPI journals
Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong
Interests: structural health monitoring; ultrasonics wave propagation; smart materials and structures; nondestructive evaluation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Since the first paper on carbon nanotubes (CNT) was published by Iijima in 1991, the number of articles and applications of carbon nanofillers has continuously increased, offering new and astonishing possibilities for advanced research and development. Restricting our search only to sensing applications, we can see that the scientific production, according to Scopus, has been about 1000–1200 papers per year since 2010, focusing on three main branches: biosensors, chemical sensors, and mechanical (strain and damage) sensors. Restricting our search to this last group, the number of publications is currently about 200 papers per year, with a fast growth in the last three years, indicating that basic principles have been well verified, with validations and applications having been intensively explored. Dispersed in polymers, nanofillers have demonstrated a high sensitivity and great easiness for diverse applications, for the conventional small strain field mixed with thermosetting resins, or for very large displacements mixed with elastomeric compounds—the so-called highly stretchable sensors. At the same time, some issues remain to be clarified, such as characterization for the sensor under a complex strain field, response to temperature, influence of the processing route, reproducibility, and reliability, and many others.

This Special Issue of Sensors (MDPI) reflects on the rise of nanofillers sensing technologies, focusing on all aspects of research and development of carbon-nanotube-related sensors. The issue emphasizes research and review manuscripts that focus on experimental design, tests, and applications of CNT sensors. We expect that by providing researchers working on CNT strain and SHM (structural health monitoring) sensors with a platform to publish their recent results, we can provide the audience a wide breadth of research that encompasses manufacturing, experimental validation, and testing.

Prof. Dr. Alfredo Güemes
Prof. Dr. Zhongqing Su
Guest Editors

Manuscript Submission Information

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  • Carbon nanotubes
  • Graphene
  • Strain sensors
  • Damage sensors
  • Structural health monitoring (SHM) Piezoresistivity
  • Nanocomposites
  • Electromechanical response
  • Electrical impedance tomography
  • Sensitive inks
  • Multifunctional composites
  • Smart adhesives

Published Papers (1 paper)

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15 pages, 5371 KiB  
Directional Response of Randomly Dispersed Carbon Nanotube Strain Sensors
Sensors 2020, 20(10), 2980; - 24 May 2020
Cited by 4 | Viewed by 2787
Tests on a double lap bonded joint, with transverse strips of randomly oriented carbon nanotubes (CNT) sprayed onto an epoxy adhesive film, showed a positive increment in electrical resistance under tensile load, even though the transverse strains were negative. Other experiments included in [...] Read more.
Tests on a double lap bonded joint, with transverse strips of randomly oriented carbon nanotubes (CNT) sprayed onto an epoxy adhesive film, showed a positive increment in electrical resistance under tensile load, even though the transverse strains were negative. Other experiments included in this work involved placing longitudinal and transversal CNT sensors in a tensile loaded aluminum plate, and, as reported by other authors, the results confirm that the resistance change is not only dependent on the strains oriented with the electrode line, while the other strain components also influence the response. This behavior is quite different to that of conventional strain gages which have a near zero sensitivity to strains not aligned to the sensor direction. The dependence of the electrical response on all the strain components makes it quite difficult, possibly unfeasible, to experimentally determine the individual strain components with this kind of sensors; however, the manufacturing of aligned CNT sensors could deal with this issue. Full article
(This article belongs to the Special Issue Carbon Nanotube and Graphene-based Sensors)
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