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The morphology of the TiO2 nanoparticles changes from cuboidal to ellipsoidal at pH above 11 with TEOA¡£
Amines are used as the shape controllers of the TiO2 nanomaterials and act as surfactants.
The TiO2 nanoparticle shape evolves into ellipsoidal above pH 9.5 with diethylenetriamine with a higher aspect ratio than that with TEOA¡£
Figure 2 shows representative TEM images of the TiO2 nanoparticles under different initial pH conditions with the shape control of TEOA at [TEOA]/ [TIPO] ) 2.0.
The shape control is attributed to the tuning of the growth rate of the different crystal planes of TiO2 nanoparticles by the specific adsorption of shape controllers to these planes under different pH conditions¡£
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Figure 2 shows representative TEM images of the TiO2 nanoparticles under different initial pH conditions with the shape control of TEOA at [TEOA]/ [TIPO] ) =2.0.
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