Preparation and Study of PDMS Material

Yadhuraj, S.R.; Gandla, Satheesh Babu; Sudarshan, B; Kumar, Suveen

doi:10.1016/j.matpr.2018.06.547

Cited by 11 publications

(6 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 30 ] In addition, the characteristic peaks in PDMS Raman spectra are typically found at 2915, 2848, and 1260 cm −1 , corresponding to methyl symmetric stretching vibration, methyl asymmetric stretching vibration, and flexural vibration of the Si─O─Si bond, respectively. [ 36 ] Figure 3d presents the contact angle measurements of the microporous PDMS–GO composite samples at varying GO percentages. The results indicate a reduction in the static contact angle from 146° for the bare PDMS to 92° for the P–0.5GO.…”

Section: Resultsmentioning

confidence: 99%

Triboelectric Nanogenerator‐Enabled 3D Microporous Polydimethylsiloxane–Graphene Oxide Nanocomposite for Flexible Self‐Powered Humidity Sensing Applications

Mohamadbeigi,

Rafiefard,

Ejehi

et al. 2024

Energy Tech

View full text Add to dashboard Cite

The imperative to meet the energy needs of contemporary electronic devices has spurred extensive exploration into self‐powered systems. Given the anticipated ubiquity of sensor networks in future cities, a novel battery‐free sensing paradigm, rooted in triboelectric nanogenerators (TENG), has gained prominence. Utilizing mechanical energy otherwise wasted daily for electricity generation presents a promising alternative to conventional sensors. Embedding the sensing electrode within the TENG structure enables the creation of gas sensors suitable for portable and wireless applications. This study focuses on fabricating a 3D microporous sponge of polydimethylsiloxane (PDMS) using sugar cubes and graphene oxide (GO) nanosheets. Leveraging the hydrophilic properties of the GO enhances moisture absorption, elevating the humidity sensor's responsivity. In addition, the porous structure not only improves sensitivity to high humidity but also mitigates surface saturation issues prevalent in nonporous sensors. The porous self‐powered sensor, composed of PDMS with 0.5 wt% of GO, exhibits a response of up to 2500%, quantified as ((ΔV/V) × 100%), to relative humidity changes from 20% to 99%. Furthermore, the response and recovery times stand at 1.2 and 2.3 s, respectively. These findings underscore the feasibility of integrating TENG electrodes, utilizing a porous PDMS–GO nanocomposite, to create various types of integrated gas sensors.

show abstract

Section: Resultsmentioning

confidence: 99%

Triboelectric Nanogenerator‐Enabled 3D Microporous Polydimethylsiloxane–Graphene Oxide Nanocomposite for Flexible Self‐Powered Humidity Sensing Applications

Mohamadbeigi,

Rafiefard,

Ejehi

et al. 2024

Energy Tech

View full text Add to dashboard Cite

show abstract

“…Adaptive liquid lenses based on polymer elastic membranes are usually constructed by encapsulating an optical fluid in a cavity with the assistance of an elastic membrane. Usually, polymer PDMS is a preferred elastic membrane material because it is highly transparent in the visible spectrum range and offers large deformation as well as good biocompatibility [113,114]. By pumping optical fluid in or out of the cavity to change the liquid pressure, the shape of the polymer elastic membrane becomes a convex or concave profile; then the focal length of the adaptive liquid lens is tunable [115][116][117][118].…”

Section: Polymer Elastic Membranementioning

confidence: 99%

Optical zoom imaging systems using adaptive liquid lenses

et al. 2021

View full text Add to dashboard Cite

An optical zoom imaging system that can vary the magnification factor without displacing the object and the image plane has been widely used. Nonetheless, conventional optical zoom imaging systems suffer from slow response, complicated configuration, vulnerability to misalignment during zoom operation, and are incompatible with miniaturized applications. This review article focuses on state-of-the-art research on novel optical zoom imaging systems that use adaptive liquid lenses. From the aspect of the configuration, according to the number of adaptive liquid lenses, we broadly divide the current optical zoom imaging systems using adaptive liquid lenses into two configurations: multiple adaptive liquid lenses, and a single adaptive liquid lens. The principles and configurations of these optical zoom imaging systems are introduced and represented. Three different working principles of the adaptive liquid lens (liquid crystal, polymer elastic membrane, and electrowetting effect) adopted in the optical zoom imaging systems are reviewed. Some representative applications of optical zoom imaging systems using adaptive liquid lenses are introduced. The opportunities and challenges of the optical zoom imaging systems using adaptive liquid lenses are also discussed. This review aims to provide a snapshot of the current state of this research field with the aim to attract more attention to put forward the development of the next-generation optical zoom imaging systems.

show abstract

“…The dot patterns of the ECM were fabricated using a microstamp made out of polydimethylsiloxane (PDMS; SYLGARD™184; Dow Toray, Tokyo, Japan). PDMS has high biological safety [69][70][71][72][73] and is also used in engineering to transfer fine patterns [74]. To fabricate the microstamp, PDMS mixed with a hardener was poured into a mold made of PTFE, after which the mold was defoamed.…”

Section: Preparation Of a Stamp For Patterning Formationmentioning

confidence: 99%

Development of a Simple Spheroid Production Method Using Fluoropolymers with Reduced Chemical and Physical Damage

et al. 2021

View full text Add to dashboard Cite

Establishing an in vitro–based cell culture system that can realistically simulate in vivo cell dynamics is desirable. It is thus necessary to develop a method for producing a large amount of cell aggregates (i.e., spheroids) that are uniform in size and quality. Various methods have been proposed for the preparation of spheroids; however, none of them satisfy all requirements, such as cost, size uniformity, and throughput. Herein, we successfully developed a new cell culture method by combining fluoropolymers and dot patterned extracellular matrix substrates to achieve size-controlled spheroids. First, the spheroids were spontaneously formed by culturing them two-dimensionally, after which the cells were detached with a weak liquid flow and cultured in suspension without enzyme treatment. Stable quality spheroids were easily produced, and it is expected that the introduction and running costs of the technique will be low; therefore, this method shows potential for application in the field of regenerative medicine.

show abstract

Preparation and Study of PDMS Material

Cited by 11 publications

References 3 publications

Triboelectric Nanogenerator‐Enabled 3D Microporous Polydimethylsiloxane–Graphene Oxide Nanocomposite for Flexible Self‐Powered Humidity Sensing Applications

Triboelectric Nanogenerator‐Enabled 3D Microporous Polydimethylsiloxane–Graphene Oxide Nanocomposite for Flexible Self‐Powered Humidity Sensing Applications

Optical zoom imaging systems using adaptive liquid lenses

Development of a Simple Spheroid Production Method Using Fluoropolymers with Reduced Chemical and Physical Damage

Contact Info

Product

Resources

About