Electrification of polymer surface caused by sliding ultrapure water

Yatsuzuka, K.; Higashiyama, Yoshio; Asano, K.

doi:10.1109/28.511638

Cited by 58 publications

(45 citation statements)

References 2 publications

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“…This conductivity sources from the dissolving of some atmospheric gases such as O 2 and CO 2 . Yatsuzuka et al reported that the O 2 and/or CO 2 dissolve inside a water droplet and the conductivity of water droplet increases [32].…”

Section: Resultsmentioning

confidence: 99%

Electrical characterization of PEDOT:PSS beyond humidity saturation

Kuş

Okur

2009

Sensors and Actuators B: Chemical

149

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a b s t r a c t PEDOT:PSS humidity sensor was fabricated using a drop-casting method between thermally evaporated gold electrodes with 30 m separation and 300 m channel width on a glass substrate. AC, DC resistivity, and AFM techniques were used to characterize the PEDOT:PSS humidity sensor in the same environmental conditions. The change of resistivity was monitored with increasing relative humidity (RH) up to 90%. The resistivity increases linearly up to a maximum value, and then it starts to decrease abruptly above 80% relative humidity (RH) after saturation of water uptake. The decrease in resistivity above 80% RH seems to be due to the water meniscus layer formed on the saturated PEDOT:PSS film. Below 80% RH, the device works like a humidity sensor.

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Section: Resultsmentioning

confidence: 99%

Electrical characterization of PEDOT:PSS beyond humidity saturation

Kuş

Okur

2009

Sensors and Actuators B: Chemical

149

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“…Based on this mechanism, most research on TENGs has focused on harvesting ambient mechanical energy types such as vibrations [21][22][23], air flows [24,25] and the mechanical energy of water [26,27]. On the other hand, water-solid interaction also causes triboelectricity with the formation of an electrical double layer (EDL) [28][29][30][31][32]. Using water as a charging material directly, a TENG can harvest water energy (water-TENG) based on a fairly simple structure consisting of one electrode and one solid material [19,20].…”

Section: Introductionmentioning

confidence: 99%

Self-cleaning hybrid energy harvester to generate power from raindrop and sunlight

et al. 2015

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“…The specific charge, expressed as the net charge per unit volume of sprayed liquid, was found to be inversely related to the electrical conductivity of, and hence the concentration of ionic species in, the liquid. [65] This effect of conductivity on charging was also observed by Yatsuzuka et al [61,62] The inverse relationship between ionic concentration and resultant charges on atomised droplets was exploited to suppress the charging of inhalation aerosols produced from a novel atomiser, AERx. [66] The rationale for reducing aerosol charging is to avoid premature droplet deposition in the oropharynx during inhalation.…”

Section: Spacer Devicesmentioning

confidence: 80%

“…This is because charge separation occurs when a liquid surface is disrupted during atomisation [57][58][59][60] or when a liquid flows against a solid surface. [61,62] Droplets of an unknown liquid nebulised from an Inspiron Mini-Neb nebuliser were found to contain bipolar charges using an ion mobility analyser. [63] The charge production rate and the ratio of positive-to-negative charges also increased with the compressed air flow rate.…”

Section: Spacer Devicesmentioning

confidence: 99%

Electrostatics of pharmaceutical inhalation aerosols

Kwok¹,

Chan²

2009

j pharm pharmacol

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Objectives This review focuses on the key findings and developments in the rapidly expanding research area of pharmaceutical aerosol electrostatics. Key findings Data from limited in-vivo and computational studies suggest that charges may potentially affect particle deposition in the airways. Charging occurs naturally in the absence of electric fields through triboelectrification, that is contact or friction for solids and flowing or spraying for liquids. Thus, particles and droplets emitted from pulmonary drug delivery devices (dry powder inhalers, metered dose inhalers with or without spacers, and nebulisers) are inherently charged. Apparatus with various operation principles have been employed in the measurement of pharmaceutical charges. Aerosol charges are dependent on many physicochemical parameters, such as formulation composition, device construction, relative humidity and solid-state properties. In some devices, electrification has been purposefully applied to facilitate powder dispersion and liquid atomisation. Summary Currently, there are no regulatory requirements on characterising electrostatic properties of inhalation aerosols. As research in this area progresses, the new knowledge gained may become valuable for the development and regulation of inhalation aerosol products.

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Electrification of polymer surface caused by sliding ultrapure water

Cited by 58 publications

References 2 publications

Electrical characterization of PEDOT:PSS beyond humidity saturation

Electrical characterization of PEDOT:PSS beyond humidity saturation

Self-cleaning hybrid energy harvester to generate power from raindrop and sunlight

Electrostatics of pharmaceutical inhalation aerosols

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