Reduction of the Casimir Force from Indium Tin Oxide Film by UV Treatment

Chang, Chia‐Cheng; Банишев, А. А.; Klimchitskaya, G. L.; Mostepanenko, V. M.; Mohideen, U.

doi:10.1103/physrevlett.107.090403

Cited by 94 publications

(177 citation statements)

References 28 publications

(38 reference statements)

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“…[45][46][47][48]52 It was claimed that anomalous dependences of the residual potential difference and separation on contact on the separation distance observed in several experiments cast doubts on the measurements of the Casimir force performed to date. It was also suggested that inasmuch electrostatic calibrations are based on a fitting procedure there is no principal difference detween independent measurements of the Casimir force [20][21][22][23][24][25][26][27][28][29][30][35][36][37][39][40][41][42][43][44]71 and deriving the Casimir force by means of a fit from some much larger measured force of hypothetical origin. 31 In this respect we would like to note that the calibration consists in determination of the parameters of a setup using well established physical laws (in our case of electrostatics) and involves only well understood and precisely measured forces.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Modifying the Casimir force between indium tin oxide film and Au sphere

et al. 2012

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We present complete results of the experiment on measuring the Casimir force between an Aucoated sphere and an untreated or, alternatively, UV-treated indium tin oxide film deposited on a quartz substrate. Measurements were performed using an atomic force microscope in a high vacuum chamber. The measurement system was calibrated electrostatically. Special analysis of the systematic deviations is performed, and respective corrections in the calibration parameters are introduced. The corrected parameters are free from anomalies discussed in the literature. The experimental data for the Casimir force from two measurement sets for both untreated and UVtreated samples are presented. The random, systematic and total experimental errors are determined at a 95% confidence level. It is demonstrated that the UV treatment of an ITO plate results in a significant decrease in the magnitude of the Casimir force (from 21% to 35% depending on separation). However, ellipsometry measurements of the imaginary parts of dielectric permittivities of the untreated and UV-treated samples did not reveal any significant differences. The experimental data are compared with computations in the framework of the Lifshitz theory. It is found that the data for the untreated sample are in a very good agreement with theoretical results taking into account the free charge carriers in an ITO film. For the UV-treated sample the data exclude the theoretical results obtained with account of free charge carriers. These data are in a very good agreement with computations disregarding the contribution of free carriers in the dielectric permittivity. According to the hypothetical explanation provided, this is caused by the phase transition of the ITO film from metallic to dielectric state caused by the UV-treatment. Possible applications of the discovered phenomenon in nanotechnology are discussed.

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Section: Conclusion and Discussionmentioning

confidence: 99%

Modifying the Casimir force between indium tin oxide film and Au sphere

et al. 2012

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“…For dielectric test bodies the theoretical predictions were found in agreement with the data only if the contribution of free charge carriers is omitted [33][34][35][36][37][38]. Keeping in mind that many of the experiments mentioned above were used, first, to make a selection between different theoretical approaches and, second, to constrain corrections to Newtonian gravity from the measure of agreement between the data and the predictions following from a selected approach, the constraints obtained were sometimes claimed to be of dubious merit [39].…”

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confidence: 94%

Constraints on non-Newtonian gravity and light elementary particles from measurements of the Casimir force by means of a dynamic atomic force microscope

Mohideen

Mostepanenko

2012

Phys. Rev. D

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We derive constraints on corrections to Newtonian gravity of the Yukawa type and light elementary particles from two recently performed measurements of the gradient of the Casimir force. In the first measurement the configuration of two Au surfaces has been used, whereas in the second a nonmagnetic metal Au interacted with a magnetic metal Ni. In these configurations one arrives at different, respectively, similar theoretical predictions for the Casimir force when the competing theoretical approaches are employed. Nevertheless, we demonstrate that the constraints following from both experiments are in mutual agreement and in line with constraints obtained from earlier measurements. This confirms the reliability of constraints on non-Newtonian gravity obtained from measurements of the Casimir force.

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“…[11][12][13][14][15][16] ) and between a metallic and a semiconductor surfaces (see, e.g., Refs. [17][18][19][20][21][22][23][24] ). Quite unexpectedly, the experimental data of many experiments performed at room temperature 13,15,16,18,[23][24][25][26] were found to exclude the theoretical predictions taking into account the relaxation properties of conduction electrons for metals and the contribution of free charge carriers for semiconductors of the dielectric type.…”

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confidence: 99%

“…[17][18][19][20][21][22][23][24] ). Quite unexpectedly, the experimental data of many experiments performed at room temperature 13,15,16,18,[23][24][25][26] were found to exclude the theoretical predictions taking into account the relaxation properties of conduction electrons for metals and the contribution of free charge carriers for semiconductors of the dielectric type. The same data were found to be consistent with theory neglecting the relaxation properties of conduction electrons for metals and the free charge carriers for dielectric-type semiconductors (the two experiments which claim confirmation of the role of relaxation properties of free electrons for metallic test bodies 27,28 are critically discussed in the literature [29][30][31][32] ).…”

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Casimir interaction at liquid nitrogen temperature: Comparison between experiment and theory

Castillo-Garza

Mostepanenko

et al. 2013

Phys. Rev. B

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We have measured the normalized gradient of the Casimir force between Au-coated surfaces of the sphere and the plate and equivalent Casimir pressure between two parallel Au plates at T = 77 K.These measurements have been performed by means of dynamic force microscope adapted for operating at low temperatures in the frequency shift technique. It was shown that the measurement results at T = 77 K are in a very good agreement with those at T = 300 K and with computations at T = 77 K using both theoretical approaches to the thermal Casimir force proposed in the literature.No thermal effect in the Casimir pressure was observed in the limit of experimental errors with the increase of temperature from T = 77 K to T = 300 K. Taking this into account, we have discussed the possible role of patch potentials in the comparison between measured and calculated Casimir pressures.

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Reduction of the Casimir Force from Indium Tin Oxide Film by UV Treatment

Cited by 94 publications

References 28 publications

Modifying the Casimir force between indium tin oxide film and Au sphere

Modifying the Casimir force between indium tin oxide film and Au sphere

Constraints on non-Newtonian gravity and light elementary particles from measurements of the Casimir force by means of a dynamic atomic force microscope

Casimir interaction at liquid nitrogen temperature: Comparison between experiment and theory

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