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Abstract  

This study investigates the knowledge diffusion patterns of Nanoscience & Nanotechnology (N&N) by analyzing the overall research interactions between N&N and nano-related subjects through citation analysis. Three perspectives were investigated to achieve this purpose. Firstly, the overall research interactions were analyzed to identify the dominant driving forces in advancing the development of N&N. Secondly, the knowledge diffusion intensity between N&N and nano-related subjects was investigated to determine the areas most closely related to N&N. Thirdly, the diffusion speed was identified to detect the time distance of knowledge diffusion between N&N and nano-related subjects. The analysis reveals that driving forces from the outside environment rather than within N&N itself make the foremost contributions to the development of N&N. From 1998 to 2007, Material Science, Physics, Chemistry, N&N, Electrical & Electronic and Metallurgy & Metallurgical Engineering are the key contributory and reference subjects for N&N. Knowledge transfer within N&N itself is the quickest. And the speed of knowledge diffusion from other subjects to N&N is slower than that from N&N to other subjects, demonstrating asymmetry of knowledge diffusion in the development of N&N. The results indicate that N&N has matured into a relatively open, diffuse and dynamic system of interactive subjects.

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present in 80s (Appendix 1). It seems that the instability in the 21st century is inherited from 80s. However the rest five fields including Cell & Tissue Engineering; Health Policy & Services; Nanoscience & Nanotechnology; Neuroimaging; and Primary

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for citation data; this new period of measurement should depend upon the specific academic fields. JCR2008 shows that there is a remarkable discrepancy in the half-lives of citations in various fields. JCR2008 demonstrates that “Nanoscience

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Nanoscience & Nanotechnology Kolkata . 33. Chinnasamy , CN , Jeyadevan , B , Perales-Perez , O , Shinoda , K , Tohji , K , Kasuya , A . 2002 . Growth dominant co-precipitation process

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—September 19-21 . Nessebar , Bulgaria , FOP13 . 24. Bojinova A , Dushkin C ( 2009 ) In: Balabanova E , Dragieva I (eds) Nanoscience & nanotechnology , vol 9

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Nanoscience & nanotechnology 10.6 12 75 25 Physics, condensed matter 9.2 10 70

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Nanoscience & Nanotechnology”, 27-28 Nov 2008, ISSN 1313-8995, Sofia: Heron Press; 2009 . p. 239 – 243 . 10. Veiderma , M , Knubovets , R , Tonsuaadu , K 1996 Fluorhyroxyapatites of

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-R 2010 Characterizing knowledge diffusion of nanoscience & nanotechnology by citation analysis . Scientometrics 84 : 81 – 97 10.1007/s11192-009-0090-2 .

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nanoscience & nanotechnology by citation analysis . Scientometrics 84 1 81 – 97 10.1007/s11192-009-0090-2 . Guimera , R , Sales-Pardo , M 2009 Missing and spurious interactions and the reconstruction of

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/SSCI was selected as the source database because it covers most of the research disciplines related to nanoscience/nanotechnology, and allows citation information to be obtained. Only records classified as articles or reviews in the SCI/SSCI were downloaded

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