Nanoscale domain growth dynamics of ferroelectric poly(vinylidene fluoride-co-trifluoroethylene) thin films were investigated by piezoresponse force microscopy. A 90 nm thick polymer fabricated on Au substrate spin-coating method. The size nanoscale dot pattern was linearly proportional to logarithmic value the pulse width. However there a significant asymmetry in nucleation and lateral depending voltage polarity, which implies existence preferred polarization states. obtained activation...

The simple use of vitamin C leads to the reductive disassembly Fe³⁺-TA complex and<italic>in situ</italic>artificial shell degradation in single-cell nanoencapsulation.

Abstract Living cells have the irreplaceable capability to achieve a wide range of complex biochemical reactions precisely and efficiently, which makes them attractive materials for therapeutic applications. In lieu traditional biological approaches primarily focused on augmentation innate functions cells, there has been appreciable progress in development engineered mainly based chemical modifications cell surfaces, at single‐cell level, empowers individual living with designed...

Sensitive strain sensors (an important component of soft robotics, wearable devices, and biomedical electronics) with high sensitivity, stretchability, long-term stability are still challenging. A sensitive, stretchable, sustainable sensor using poly(3,4-ethylenedioxythiophene) (PEDOT) coated cellulose nanocrystals (CNC) poly(vinyl alcohol)/glycerol (PVA/Gly) composite is proposed. The low cost PEDOT CNC aspect ratio lowered the electrical percolation threshold that significantly improved...

Starch-based layer-by-layer (LbL) nanofilms are formed and enzymatically degraded on individual<italic>Saccharomyces cerevisiae</italic>in a highly cytocompatible fashion. Their enzymatic degradation by α-amylase is also exploited for the controlled release of DNA.

A cellular network is a closed system, and each operator has built unique “walled garden” for their by combining different operation policies, configurations, implementation optimizations. Unfortunately, some of these combinations can induce performance degradation due to misconfiguration or unnecessary procedures. To detect such degradation, thorough understanding even the minor details standards operator-specific implementations important. However, it difficult problems, as control plane...

Thin film transistors (TFTs) with anatase-TiO2 channel material deposited on an SiO2/Si substrate by atomic layer deposition are fabricated to investigate the effect of source/drain (S/D) metal work function electrical characteristics TFTs. S/D materials such as aluminum, silver, and gold selected for this study. From measured current-voltage characteristic curves in dark at room temperature, it is demonstrated that anatase TiO2-based TFT Ag shows highest on/off-current ratio (∼ 105), field...

Abstract Astrocytes, the most representative glial cells in brain, play a multitude of crucial functions for proper neuronal development and synaptic‐network formation, including neuroprotection as well physical chemical support. However, little attention has been paid, neuroregenerative medicine related fields, to cytoprotective incorporation astrocytes into neuron‐culture scaffolds full‐fledged functional utilization encapsulated controlled development. In this article, 3D neurosupportive...

Construction of extracellular matrix-mimetic nanofilms has considerable potential in biomedical and nanomedicinal fields. In this work, we fabricated neurocompatible layer-by-layer (LbL) films based on ulvan (ULV), a highly sulfated polysaccharide having compositional similarity to glycosaminoglycans that play important functional roles the brain. ULV was durably assembled as film with chitosan, another marine-derived polysaccharide, enabled stable adhesion primary hippocampal neurons high...

Android application is an important class on today's Internet. While understanding app-specific behavior for network operation and management, it often difficult because requires in-depth application-layer protocol analysis due to the common use of HTTP(S) standard data representations (e.g., JSON). This paper presents Extractocol, first system offer automatic comprehensive behaviors. Extractocol only uses binary as input accurately reconstructs HTTP transactions (request-response pairs)...

Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Hyunwoo Choi, Jongin Hong, Kwangsoo No; Local surface potential distribution its relaxation in ferroelectric poly(vinylidenefluoride-co-trifluoroethylene) thin films. Appl. Phys. Lett. 23 July 2012; 101 (4): 042904. https://doi.org/10.1063/1.4734870 Download citation file: Ris (Zotero) Reference Manager EasyBib...

Recently, cellular operators have started migrating to IPv6 in response the increasing demand for IP addresses. With introduction of IPv6, middleboxes, such as firewalls preventing malicious traffic from Internet and stateful NAT64 boxes providing backward compatibility with legacy IPv4 services, become crucial maintain stability networks. This paper presents security problems currently deployed middleboxes five major operators. To this end, we first investigate several key features current...

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It is pretty well known that insecure code updating procedures for Android allow remote injection attack. However, other than codes, there are many resources in have to be updated, such as temporary files, images, databases, and configurations (XML JSON). Security of update these largely unknown. This paper investigates general conditions attacks on resources. Using this, we design implement a static detection tool automatically identifies apps meet conditions. We apply the large dataset...

With lots of interest in negative capacitance field-effect transistors for ultralow-power complementary metal-oxide-semiconductor technology, thin-film (NCTFTs) have also received much attention. Although previous studies on NCTFTs were done, the NC effect organic-based TFTs was not studied yet. In this paper, P(VDF-TrFE) ferroelectric-gated P3HT semiconductor channel are experimentally demonstrated with solution-based fabrication process. Especially, paper shed light organic based TFTs. The...

Negative capacitance field effect transistor with two‐dimensional channel material (2D‐NCFET) has received lots of attention as a steep switching device for low power application. In this work, P(VDF 0.75 ‐TrFE 0.25 ) ferroelectric capacitor is connected in series to the gate electrode baseline FET material, i.e., molybdenum disulfide (MoS 2 ). With help negative (herein, notice that NC physically originated from polarization material), it experimentally demonstrated 2D‐NCFET enables achieve...

Effects of surface morphology on the retention loss ferroelectric domains poly(vinylidenefluoride-co-trifluoroethylene) thin films were investigated using piezoresponse force microscopy. We found that occurred by nucleation opposite at regions with morphological gradients between 0.079 and 0.146. In addition, we observed collective decreases in amplitude after 0.8 × 106 s, although each reversed domain showed different growth rate as evidenced threshold time for phase reversal. These results...

We present direct observations of electric-field induced changes in the local ferromagnetic (F) domain structure films formed from inclusions F cobalt an antiferromagnetic host BiFeO3. Piezoelectric force microscopy was used to demonstrate that composite Co–BiFeO3 display ferroelectricity. Strikingly, magnetic contrast microscopic images were found with application a perpendicular electric field. These are results exchange interaction between Co and

Abstract PbTiO 3 (PTO) nanotubes (NTs) were synthesized at various temperatures by gas phase reaction between PbO and anatase TiO 2 NTs characterized piezoresponse force microscopy (PFM). PTO ferroelectric was as low 400 °C evidenced PFM domain images hysteresis loop measurement. Furthermore, the fabricated above 500 underwent mechanical fracture through development of nanocracks due to grain growth, leading domains with larger size lower aspect ratio. (© 2011 WILEY‐VCH Verlag GmbH &amp; Co....

Manipulation and control of cell chemotaxis remain an underexplored territory despite vast potential in various fields, such as cytotherapeutics, sensors, even robots. Herein is achieved the chemical over chemotactic movement direction Jurkat T cells, a representative model, by construction cell-in-catalytic-coat structures single-cell nanoencapsulation. Armed with catalytic power glucose oxidase (GOx) artificial coat, nanobiohybrid cytostructures, denoted Jurkat[Lipo_GOx] , exhibit...

Modern x86 processors support an AVX instruction set to boost performance. However, this extension may also cause security issues. We discovered that there are vulnerable properties in the implementation of masked load/store instructions. First, these instructions can suppress exceptions caused by invalid or inaccessible memory access. Second, execution time leaks current state page mappings, permissions, and TLB states. Based on this, we present a novel timing side-channel attack defeat...

Nanoscale ferroelectric honeycombs, comprised of vertically aligned PbTiO 3 nanotubes, are fabricated by vapor phase reaction between lead acetate‐infiltrated TiO 2 nanotubes and PbO vapor. nanohoneycombs converted at 550°C showed well‐aligned nanoscale structure with alignment angle less than 1° well‐defined properties the effective piezoelectric coefficient 44 pm/V. This novel is expected to facilitate high efficiency sensing electromechanical electrochemical stimuli.