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(a) TEM image, (b) Selected area electron diffraction (SAED) pattern and (c) HRTEM image of the mesoporous ordered WO3 network after crystallization. (d) Fourier transform of the image shown in (c). Reproduced with permission, Ref. [43]; Copyright 2006 Wiley-VCH Verlag GmbH & Co. KGaA.
