Aller au menu Aller au contenu
Evénements de l'IMEP-LAHC
Microélectronique, électromagnétisme, photonique, hyperfréquences
Evénements de l'IMEP-LAHC
Evénements de l'IMEP-LAHC

> Actualites

Meilleur poster 2012

"Mechanical energy harvesting with piezoelectric nanostuctures: Great expectations for autonomoas systems"

Mis à jour le 25 juillet 2014
A+Augmenter la taille du texteA-Réduire la taille du texteImprimer le documentEnvoyer cette page par mail cet article Facebook Twitter Linked In

Gustavo ARDILA a gagné le prix du 'meilleur poster' à la conférence FTM-VIII 2012 Advanced Research Workshop Future Trends in Microelectronics: Into the Cross Currents June 25-29, 2012: Corsica, France

Mr Gustavo ARDILA RODRIGUEZ

Mr Gustavo ARDILA RODRIGUEZ

To date, several approaches have been proposed to harvest energy from different energy sources, such as thermal, solar, RF, or mechanical sources [1], using thin films and MEMS technologies. With the advent of ultra-low power circuits, the energy needed for autonomous systems can be harvested by ever smaller structures and, eventually, nanostructures. Moreover, some properties of nanostructures can be controlled and improved compared to bulk [2, 3]. We discuss the state-of-the-art and prospects of mechanical energy harvesting using nanostructures, taking into account integration issues.
One of the main characteristics of nanowires is that their resonance frequencies reach the MHz range, leading to new applications for vibrational energy harvesting. At lower frequencies, nanowires can harvest energy from deformations. The most studied materials have been ZnO, and more recently GaN.
Prototypes of mechanical energy harvesters have been demonstrated based on ZnO nanowires, with a power density of ~11 mW/cm3 [4], which starts to be comparable to that of MEMS devices (~0.1-40mW/cm3 [5]). Gallium nitride offers better integration prospects with silicon. It is chemically stable and
both n- and p-type doping can be achieved. Moreover, it has been shown recently that the piezoelectric coefficients (d33) can be increased from 0.73 for bulk material to 3.36 C/N2 for nanowires [3]. This leads to higher generated power, for a given deformation. Recent results show how these properties can be
further improved (by an estimated factor of 9) in heterostructured GaN NWs including an AlN barrier
(Fig. 1) [6]. In the future, it is expected that autonomous systems will harvest energy from multiple sources for energy availability reasons. Towards this end, some devices harvesting solar and mechanical energy using nanostructures have been recently reported in the literature and will be discussed [7].


  Fig. 1. (a) STEM image and (b) measured potential vs. deflection of a GaN/AlN/GaN hetero-NW [4].

1. K. A. Cook-Chennault, N. Thamby, and A. S. Sastry, Smart Mater. Struct. 17, 043001 (2008).
2. D. Li, Y. Wu, P. Kim, et al., Appl. Phys. Lett. 83, 2934 (2003).
3. M. Minary-Jolandan, R. A. Bernal, I. Kuljanishvili, et al., Nano. Lett. 12, 970 (2012).
4. X. Xu, A. Potie, R. Songmuang, et al., Nanotechnology 22, 105704 (2011)
5. G. Zhu, R. Yang, S. Wang, and Z. L. Wang, Nano Lett. 10, 3151 (2010).
6. P. D. Mitcheson, E. M. Yeatman, G. K. Rao, et al., Proc. IEEE 96, 1457 (2008).
7. C. Xu and Z. L. Wang, Adv. Mater. 23, 873 (2011).


A+Augmenter la taille du texteA-Réduire la taille du texteImprimer le documentEnvoyer cette page par mail cet article Facebook Twitter Linked In

mise à jour le 25 juillet 2014

anglais
CROMA
Site de Grenoble
Grenoble INP - Minatec - 3, Parvis Louis Néel , CS 50257 - 38016 Grenoble Cedex 1

Site de Chambéry
Université Savoie Mont Blanc - Rue Lac de la Thuile, Bat. 21 - 73370 Le Bourget du Lac
 
 
République Française         Logo CNRS_2019       Logo Grenoble INP - UGA Université Grenoble Alpes      Université Savoie Mont Blanc
Université Grenoble Alpes