| Zugriffsnummer | 43653 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Cantilever-Droplet-Based Sensing of Magnetic Particle Concentrations in Liquids |
| Autor(in); Institution |
Nyang'au, Wilson Ombati; Technische Universität Braunschweig, IHT & LENA, Braunschweig, GERMANY; Kenya Bureau of Standards (KEBS), Nairobi, KENYA
Setiono, Andi; Technische Universität Braunschweig, IHT & LENA, Braunschweig, GERMANY; Research Center for Physics, Indonesian Institute of Sciences (LIPI), Kawasan Puspiptek Serpong, Tangerang Selatan, INDONESIA
Bertke, Maik; Technische Universität Braunschweig, IHT & LENA, Braunschweig, GERMANY
Bosse, Harald; 5, Fertigungsmesstechnik, PTB-Braunschweig
Peiner, Erwin; Technische Universität Braunschweig, IHT & LENA, Braunschweig, GERMANY
|
| Quelle/Jahr | Sensors: 19 (2019), 21, 1 - 18 |
| Artikelnummer | 4758 |
| Availability | [online only] |
| ISSN | 1424-8220 |
| DOI | |
| Verlag | Basel: MDPI |
| Freie Schlagworte | microcantilever ; resonant frequency ; magnetic polystyrene particles ; droplet ; adsorption ; mass ; concentration |
| Zusammenfassung | Cantilever-based sensors have attracted considerable attention in the recent past due to their enormous and endless potential and possibilities coupled with their dynamic and unprecedented sensitivity in sensing applications. In this paper, we present a technique that involves depositing and vaporizing (at ambient conditions) a particle-laden water droplet onto a defined sensing area on in-house fabricated and commercial-based silicon microcantilever sensors. This process entailed the optimization of dispensing pressure and time to generate and realize a small water droplet volume (Vd = 49.7 ± 1.9 pL). Moreover, we monitored the water evaporation trends on the sensing surface and observed total evaporation time per droplet of 39.0 ± 1.8 s against a theoretically determined value of about 37.14 s. By using monodispersed particles in water, i.e., magnetic polystyrene particles (MPS) and polymethyl methacrylate (PMMA), and adsorbing them on a dynamic cantilever sensor, the mass and number of these particles were measured and determined comparatively using resonant frequency response measurements and SEM particle count analysis, respectively. As a result, we observed and reported monolayer particles assembled on the sensor with the lowest MPS particles count of about 19 ± 2. |
| Kostenfreier Zugang | Open Access Gold |
| Rechteinformation | CC BY 4.0 ; Creative Commons Attribution 4.0 License |
| Themenbereich der Metrologie | Nanometrologie |