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The influence of carbon nanotube (CNT) dispersions on the electrical properties and noise signal amplitude of V O x films is investigated. For a critical range of the CNT dispersion density on V O x films, the intrinsic properties of the V O x films are modified by the CNTs. The CNT concentrations reported in this work are about 0.3 μ g/cm 2 and 1.6 μ g/cm 2 , allowing for low density and high density dispersions on the V O x film surface to be investigated. These values are higher than the percolation threshold of about 0.12 μ g/cm 2 for these films. The composite film exhibits a significant reduction in the temperature coefficient of resistance (TCR) (from ≈3.8% K − 1 to ≈0.3% K − 1 ) for high density dispersions. In contrast, while V O x –CNT composites with low density single wall CNT dispersions exhibit no significant change in TCR values, an approximate two orders of magnitude reduction in the low frequency 1/f noise is measured. The noise signal amplitude measured at 0.1 V and at 1.0 Hz reduces from 6 × 10 − 5 V / (H z) for V O x films to 5 × 10 − 7 V / (H z) for the low density SWCNT dispersion on V O x film and to 3 × 10 − 6 V / (H z) for the low density MWCNT dispersion on V O x film. The CNT concentration is the critical factor for yielding the observed changes in conductivity and low frequency noise. The results presented in this work provide a better understanding of V O x -based composites, thereby enabling the development of new, versatile and functional materials for device applications. [ABSTRACT FROM AUTHOR]