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Title

Ανάπτυξη Διδασκαλίας Νανοτεχνολογίας στη Δευτεροβάθμια Εκπαίδευση Μελέτη Οπτικών Ιδιοτήτων - Αλλαγή Χρώματος στην Νανοκλίμακα

Alternative Title

Development of Teaching Material for Nanotechnology in Secondary Education Study of Optical Properties - Color Change at the Nanoscale

Author

Βεναρδάτου, Σοφία

Thesis advisor

Σταύρου, Δημήτρης

Reviewer

Παπαδάκης, Ιωσήφ
Μιχαηλίδη, Αικατερίνη-Αιμιλία

Abstract

In recent years, Nanoscience and Nanotechnology (NET) have become important scientific fields of study. The term Nanoscale refers to objects (Nanomaterials) with dimensions ranging from 1 to 100 nanometers (10⁻⁹ 𝑚) in at least one of their dimensions. Nanomaterials present new and often unexpected properties on which many innovative applications are based. The development of Nanoscience and Nanotechnology (NET) and their ever-increasing penetration into our daily lives push the integration of their aspects in compulsory education. The purpose of this dissertation was the development of teaching material on the subject of changing the optical properties of materials in the Nanoscale using analogies. The possibility of integrating aspects of NET in secondary education is also being studied. In the present dissertation, the model of "Educational Reconstruction - MER" was used as a theoretical framework. This model offers a feedback interaction between: (a) the analysis of the structure of scientific content from a didactic point of view, (b) empirical research on students' perceptions and learning processes, and (c) the design of learning environments. Applying the MER on a High School environment, two fundamental notions were studied. First the perceptions of high school students about the change of color in nanogold solutions were investigated and last the learning processes of students towards the acquisition of scientific knowledge. The empirical research involved students of the 2nd Lyceum of Souda was organized in two axes. The first axis was the creation and elaboration of a preliminary open questionnaire recording the students' perceptions (prequestionnaire): (a) for the 9 Nanoscale sizes, (b) for the properties of the materials, (c) the conditions under which the properties change and (d) the use of Nanotechnology in everyday life. The second and central axis of the research was the development of the didactic unit for the change of optical properties (color) in the Nanoscale and the recording of students' perceptions. Pptx presentations, audiovisual material (video) reproduction, analogies and experimental activities were used as teaching aids. In conclusion, the research shows the following: The students who encountered Nanoscience and Nanotechnology (NET) acquired a positive attitude towards it. The students, while initially they did not think that size affects the properties of materials, modified this view, finally arguing that the change in color (optical property) of a material may be due to a change in its size or shape at the Nanoscale. Finally, it seems that the use of analogy in the experimental activities developed as part of the teaching helped most students to explain the different behavior of the materials (color change) based on their size and shape. The research gave encouraging results for future integration of other aspects of NET in compulsory education.

Language

Greek

Subject

Change of size-dependent optical properties (color)

Model of educational reconstruction

Nanoscience Nanotechnology (NET) in Secondary Education

Use of analogies in teaching

Αλλαγή οπτικών ιδιοτήτων με βάση το μέγεθος (χρώμα)

Μοντέλο διδακτικής αναδόμησης

Νανοεπιστήμη Νανοτεχνολογία (ΝΕΤ) στην Δευτεροβάθμια Εκπαίδευση

Χρήση αναλογιών στην διδασκαλία

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