A movable polymeric microneedle array actuated by thermopneumatic force

Jung, Minhyun; An, Jae Yong; Park, Yangkyu; Yang, Sung; Lee, Jong‐Hyun

doi:10.1016/j.sna.2015.12.002

Cited by 6 publications

(2 citation statements)

References 29 publications

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“…can be adjusted to restore it to its original state. SMMs include shape memory alloy (SMA), shape memory ceramic (SMC), and shape memory polymer (SMP) [ 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric Responsive Shape Memory Graphene/Hydro-Epoxy Composites for Actuators

et al. 2016

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A series of thermoelectric responsive shape memory hydro-epoxy (H-EP) composites filled with different contents of graphene were developed and characterized. Compared with traditional actuation materials, these novel shape memory composites exhibit attractive properties, such as light weight, large deformation, good processability and high response speed, making them good candidates for actuator materials. The effect of graphene content on the shape memory composites was studied in terms of mechanical, dynamic mechanical analysis (DMA), electrical properties, and thermoelectric responsive shape memory test. The results show that when graphene content was 2 wt %, the bend strength of the composite improved by about 47% with a storage modulus larger than other composites. The shape recovery ratio of the composites was about 100%, and the shape recovery speed increased with the increment of graphene content, applied voltage, and temperature. Due to the excellent actuation performance, the graphene/hydro-epoxy composite has potential applications in the actuator in the future.

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“…can be adjusted to restore it to its original state. SMMs include shape memory alloy (SMA), shape memory ceramic (SMC), and shape memory polymer (SMP) [ 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric Responsive Shape Memory Graphene/Hydro-Epoxy Composites for Actuators

et al. 2016

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“…For efficient heating of adsorbents in the desorption of VOCs and for effective programmed heating of the stationary phase material, a high-performance microheater for the μPCT and μSC is necessary. In addition, microheaters are a key component of various microsensors [17][18][19] and biochemical reactors [20][21][22]. E-beam evaporators and sputters are typically used to fabricate metallic microheaters.…”

mentioning

confidence: 99%

Development of micromachined preconcentrators and gas chromatographic separation columns by an electroless gold plating technology

Kuo

Chen

et al. 2017

J. Micromech. Microeng.

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In this study, a simple process for fabricating a novel micromachined preconcentrator (μPCT) and a gas chromatographic separation column (μSC) for use in a micro gas chromatograph (μGC) using one photomask is described. By electroless gold plating, a high-surface-area gold layer was deposited on the surface of channels inside the μPCT and μSC. For this process, (3-aminopropyl) trimethoxysilane (APTMS) was used as a promoter for attaching gold nanoparticles on a silicon substrate to create a seed layer. For this purpose, a gold sodium sulfite solution was used as reagent for depositing gold to form heating structures. The microchannels of the μPCT and μSC were coated with the adsorbent and stationary phase, Tenax-TA and polydimethylsiloxane (DB-1), respectively. μPCTs were heated at temperatures greater than 280 °C under an applied electrical power of 24 W and a heating rate of 75 °C s−1. Repeatable thermal heating responses for μPCTs were achieved; good linearity (R2 > 0.9997) was attained at three heating rates for the temperature programme for the μSC (0.2, 0.5 and 1 °C s−1). The volatile organic compounds (VOCs) toluene and m-xylene were concentrated over the μPCT by rapid thermal desorption (peak width of half height (PWHH) <1.5 s); preconcentration factors for both VOCs are >7900. The VOCs acetone, benzene, toluene, m-xylene and 1,3,5-trimethylbenzene were also separated on the μSC as evidenced by their different retention times (47–184 s).

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Panoramic review on polymeric microneedle arrays for clinical applications

Nguyen,

et al. 2024

Biomed Microdevices

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A movable polymeric microneedle array actuated by thermopneumatic force

Cited by 6 publications

References 29 publications

Thermoelectric Responsive Shape Memory Graphene/Hydro-Epoxy Composites for Actuators

Thermoelectric Responsive Shape Memory Graphene/Hydro-Epoxy Composites for Actuators

Development of micromachined preconcentrators and gas chromatographic separation columns by an electroless gold plating technology

Panoramic review on polymeric microneedle arrays for clinical applications

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