Enhancement in Mechanical Properties of Polystyrene Filled with Carbon Nano-Particulates (CNP&amp;lt;sub&amp;gt;S&amp;lt;/sub&amp;gt;)

Aly, Ayman A.; Mahmoud, Moustafa M.; Omar, Adel A.

doi:10.4236/wjnse.2012.22013

Cited by 12 publications

(6 citation statements)

References 26 publications

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“…PS being cost-effective commercial commodity plastic material has been utilized as one of the important polymeric materials for various NLO-active devices (Sureshkumar et al 2008). It is reported that the optical properties, magnetic properties, and mechanical properties of PS were significantly improved after embedding metal or semiconductor nanoparticles into the polymer matrix (Nikkeshi et al 1998;Zhu and Schmauder 2003;Ahmad and Mamat 2011;Aly et al 2012;Sangawar and Golchha 2013). It is reported that addition of metal nanoparticles can enhance the thermal conductivity and heat transfer of fluid (Sheikholeslami 2017a, b;Sheikholeslami and Vajravelu 2017).…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of polystyrene incorporated with gold and silver nanoparticles for optoelectronic applications

2017

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In this paper, methyl-orange-doped polystyrene (PS) microspheres covered with gold and silver nanoparticles (NPs) have been synthesized. The optical and structural properties of the porous polystyrene films before and after incorporation of Au and Ag nanoparticles were investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), atomic force microscope (AFM), Fourier transformation infrared spectrophotometer (FT-IR), and UV-Vis spectrophotometer. The optical data showed that the optical energy gap of PS film was increased from 2 to 3.4 eV and to 3.5 eV after being filled with Ag and Au nanoparticles, respectively. The electrical and photoresponse properties of Ag-PS/p-Si and Au-PS/pSi heterojunctions were studied. The rectification characteristics of the junction were improved after nanoparticle incorporation. The photoresponse results confirm the presence of two peaks of response located at 450 and 900 nm. The Au-PS/Si heterojunction gave the best photosensitivity.

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Section: Introductionmentioning

confidence: 99%

Preparation and properties of polystyrene incorporated with gold and silver nanoparticles for optoelectronic applications

2017

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“…The ultrathin dielectric quality could be improved by the introduction of the sputtered C NPs, since it has been reported that the addition of C can enhance the mechanical and insulating properties of low-k polymers. [ 31,32 ] In the present case, because of the expected strong interaction between the C NPs and the polymers, the adhesion of the polymer dielectrics on the substrate is greatly reinforced. Therefore, the PS/C, PMMA/C, and PVN/C dielectrics can be robust and free of tiny pinholes and cracks.…”

Section: Doi: 101002/aelm201500349mentioning

confidence: 88%

Bias‐Stress‐Stable Low‐Voltage Organic Field‐Effect Transistors with Ultrathin Polymer Dielectric on C Nanoparticles

Liu

Wang

Liu

et al. 2016

Adv Elect Materials

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both p-type and n-type OFETs. Based on the hybrid dielectrics, the operating gate bias ( V GS ) for the pentacene-based and N,N′ -ditridecyl-3,4,9,10-perylenetetracarboxylic diimide (PTCDI-C 13 H 27 )-based OFETs is down to −2 and 2 V, respectively. The devices exhibit typical µ FE , high ON/OFF ratio, and, in particular, excellent bias stress stability upon prolonged operation up to 6 × 10 4 s. The presence of the sputtered C NPs turns out to be the key for the formation of an ultrathin and pinhole-free polymer dielectric layer. This type of low-voltage OFETs with high operating stability can be realized on a fl exible substrate as well. Therefore, depositing an ultrathin low-k polymer on sputtered C NPs is a promising way for achieving high-performance low-voltage OFETs.The device structure of the low-voltage OFETs is schematically illustrated in Figure 1 , where a submonolayer of C is deposited by sputtering and spontaneously forms C NPs on Si. [ 23 ] The atomic force microscopy (AFM) image in Figure 1 demonstrates the uniform distribution of a number of C NPs on the substrate, and their height and lateral size are around 2 and 20 nm, respectively. The X-ray photoelectron spectroscopy (XPS) and Raman characterization results ( Figure S1, Supporting Information) suggest that the sputtered C NPs are amorphous C containing oxygenated groups and small graphite-like domains. [ 23 ] The C-NP-modifi ed Si surface possesses high surface energy and induces a small water contact angle of 45° (Figure 1 ), and the surface roughness is slightly increased from 0.17 ± 0.03 to 0.24 ± 0.03 nm upon the deposition of C NPs. Three kinds of low-k polymers, i.e., polystyrene (PS), polymethylmethacrylate (PMMA), and poly(2-vinyl naphthalene) (PVN), are then spin-coated onto the sputtered C NPs as the gate dielectrics (PS/C, PMMA/C, and PVN/C, respectively). The preparation conditions are controlled to deposit the dielectric layers as thin as 12-13 nm. Measured C i for the PS/C, PMMA/C, and PVN/C dielectrics ( Figure S2a,b, Supporting Information), about 180, 230, and 205 nF cm −2 , respectively, are quite large owing to their small d . Note that experimentally derived C i are well consistent with the theoretical ones calculated from k / d . For such ultrathin low-k dielectrics, the accumulated surface charge density ( n = C i V GS / q ) can be up to the order of 10 12 cm −2 at V GS = ±1 V, where q is the electron charge quantity. The pentacene/PTCDI-C 13 H 27 thin fi lm acts as the p-type/n-type organic active layer, respectively, and Cu on top is employed as the drain and source electrodes. [ 24 ] Figure 2 a-c shows the transfer characteristics of the pentacene-based low-voltage OFETs on the PS/C, PMMA/C, and PVN/C dielectrics, respectively, where the drain bias ( V DS ) is as low as −0.2 V and the V GS range is no higher than −2 V. I GS Organic fi eld-effect transistors (OFETs) are essential components in future fl exible, wearable, and portable electronic devices, which have numerous applications such as sensors, identifi cation ...

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“…From the concept of hardness, it can be considered as plastic deformation measure where a material can suffer under impact of the external stresses. Thus, the addition of reinforcing material to base material results in increasing the material hardness as a result of increasing its resistance to plastic deformation [8], as well as the penetration of the reinforcing material into the base material within the interspaces and vacancies results in an increase in contact area and therefore a link between the base material and the reinforcing material, which leads to strengthening of the composite and after that, an increase in hardness [9]. Table (2) illustrates hardness values of all of the polymeric blend films.…”

Section: Mechanical Characteristicsmentioning

confidence: 99%

Preparation and Study of Some Mechanical Properties of Polymeric Blend Films [PVA: PVP-CaCl2.2H2O]

Rustam¹,

Salman²,

Mahmood³

2022

djps

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In the present paper, pure polymeric blend films [PVA: PVP] reinforced by CaCl2.2H2O salt have been produced with different weight ratios (10, 20, 30, 40, 50 wt %) by using the solution casting method, where the mechanical properties such as tensile, hardness, and impact were studied. The effects of weight ratio of salt on tensile characteristics of reinforced polymeric blend films have been studied, where we note the increase in the values of the tensile characteristics that are represented by Yung modulus and the maximum tensile strength (at all weight ratios) of the reinforcement by CaCl2.2H2O salt in comparison with pure polymeric blend films [PVA: PVP] reinforced by CaCl2.2H2O salt. The impact of salt weight ratio on hardness (Shore D) of polymeric blend films was studied, and the experimental results showed that the hardness increased with an increase in salt weight ratio, as well as the effect of salt weight ratio on the impact represented by fracture energy and impact strength of the reinforced polymeric blend films, where it was found that the values of the fracture energy and impact strength increased with an increase of the salt weight ratio.

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Enhancement in Mechanical Properties of Polystyrene Filled with Carbon Nano-Particulates (CNP<sub>S</sub>)

Cited by 12 publications

References 26 publications

Preparation and properties of polystyrene incorporated with gold and silver nanoparticles for optoelectronic applications

Preparation and properties of polystyrene incorporated with gold and silver nanoparticles for optoelectronic applications

Bias‐Stress‐Stable Low‐Voltage Organic Field‐Effect Transistors with Ultrathin Polymer Dielectric on C Nanoparticles

Preparation and Study of Some Mechanical Properties of Polymeric Blend Films [PVA: PVP-CaCl2.2H2O]

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