Pure and mixed ordered monolayers of tetracyano-2,6-naphthoquinodimethane and hexathiapentacene on the Ag(100) surface

• Robert Harbers,
• Timo Heepenstrick,
• Dmitrii F. Perepichka and
• Moritz Sokolowski

Beilstein J. Nanotechnol. 2019, 10, 1188–1199, doi:10.3762/bjnano.10.118

• have a “great potential for use in next-generation textile and wearable electronics” [22]. HTPEN was investigated as a material for organic solar cells [23], for which purpose it was combined with lead(II) phthalocyanine and pentacene. These heterostructures exhibit a greater range of photosensitivity

Wearable, stable, highly sensitive hydrogel–graphene strain sensors

• Jian Lv,
• Chuncai Kong,
• Chao Yang,
• Lu Yin,
• Itthipon Jeerapan,
• Fangzhao Pu,
• Xiaojing Zhang,
• Sen Yang and
• Zhimao Yang

Beilstein J. Nanotechnol. 2019, 10, 475–480, doi:10.3762/bjnano.10.47

• sensor to be used in both stretching and bending modes. As a demonstration, the as-prepared strain sensor was applied to sense the movement of finger knuckles. Given the outstanding performance of this wearable sensor, together with the proposed scalable fabrication method, this stable and sensitive

• hydrogel strain sensor is considered to have great potential in the field of wearable sensors. Keywords: graphene; high sensitivity; hydrogel; strain sensor; wearable sensor; Introduction Wearable, flexible sensors to monitor human body pressure, temperature, strain, and chemicals hold great potential in

• human skin has impeded further integration as a wearable sensing component [7]. Hydrogels, with mechanical properties like biological tissues and consisting of three-dimensional polymer networks that can retain a large amount of water, can serve as ideal vehicles for wearable devices [8][9]. Several

A Ni(OH)₂ nanopetals network for high-performance supercapacitors synthesized by immersing Ni nanofoam in water

• Donghui Zheng,
• Man Li,
• Yongyan Li,
• Chunling Qin,
• Yichao Wang and
• Zhifeng Wang

Beilstein J. Nanotechnol. 2019, 10, 281–293, doi:10.3762/bjnano.10.27

• provides a new idea for the synthesis of nanostructured Ni(OH)2 by a simple approach and ultra-low cost, which largely extends the prospect of commercial application in flexible or wearable devices. Keywords: dealloying; Ni nanofoam; Ni(OH)2 nanopetals; metallic glass; supercapacitor; Introduction

• the electrodes based on electro-active Ni(OH)2. Besides, the key point is that Ni(OH)2/Ni-NF/MG electrodes exhibit excellent flexibility, which is a prominent feature of Ni(OH)2/Ni-NF/MG electrodes and meets the requirements of wearable devices. The outstanding electrochemical performance of Ni(OH)2

• flexibility are a promising prospect in wearable energy storage devices. Conclusion In summary, a sandwich-like Ni(OH)2/Ni-NF/MG electrode with good flexibility was synthesized through a two-step synthesis including the dealloying of ductile Ni40Zr20Ti40 metallic glass to form a Ni nanofoam interlayer and

Synthesis and applications of carbon nanomaterials for energy generation and storage

• Marco Notarianni,
• Jinzhang Liu,
• Kristy Vernon and
• Nunzio Motta

Beilstein J. Nanotechnol. 2016, 7, 149–196, doi:10.3762/bjnano.7.17

• efficiency and stability. However, the flexibility and the low cost of these materials provide the opportunity for many applications such as wearable and disposable electronics or mobile charging. The application of carbon nanotubes and graphene to supercapacitors is also discussed and reviewed in this work

Chemiresistive/SERS dual sensor based on densely packed gold nanoparticles

• Sanda Boca,
• Cosmin Leordean,
• Simion Astilean and
• Cosmin Farcau

Beilstein J. Nanotechnol. 2015, 6, 2498–2503, doi:10.3762/bjnano.6.259

• sensors are chemiresistors, which are sensitive electrical devices capable of detecting (bio)chemicals by simply monitoring electrical resistance. They require simple DC circuitry, and are therefore ideal for developing wearable/portable devices for protection from chemical exposure, or for environmental

Pt- and Pd-decorated MWCNTs for vapour and gas detection at room temperature

• Hamdi Baccar,
• Atef Thamri,
• Pierrick Clément,
• Eduard Llobet and
• Adnane Abdelghani

Beilstein J. Nanotechnol. 2015, 6, 919–927, doi:10.3762/bjnano.6.95

• animal health, even at trace levels in ambient. Indeed, some aromatic VOCs such as benzene are known to be carcinogenic [4][5][6][7] and there might not be a safe exposure limit to this compound. Thus, there is a need for the development of simple, affordable and wearable, yet accurate detectors that can

• temperatures [18]) thus enabling the development of low-power sensors [13][19]. This is essential for achieving long-life, battery-operated, wearable detectors. Furthermore, carbon nanotube sensors can be easily miniaturised, which is not the case for electrochemical sensors [20]. Pristine carbon nanotubes are

Morphological and structural characterization of single-crystal ZnO nanorod arrays on flexible and non-flexible substrates

• Omar F. Farhat,
• Mohd M. Halim,
• Mat J. Abdullah,
• Mohammed K. M. Ali and
• Nageh K. Allam

Beilstein J. Nanotechnol. 2015, 6, 720–725, doi:10.3762/bjnano.6.73

• temperatures. Further, the fabrication conditions are not compatible with some substrates such as organic materials for flexible and wearable electronics. In contrast, the chemical bath deposition (CBD) method is a low-cost method, requiring low-temperature operation conditions that are suitable for large

Review of nanostructured devices for thermoelectric applications

• Giovanni Pennelli

Beilstein J. Nanotechnol. 2014, 5, 1268–1284, doi:10.3762/bjnano.5.141

• electronics and sensors. One more application field of TEGs is energy scavenging. For example, body heat can be used for powering wearable sensor systems or, eventually, for powering personal electronics as mobile phones. It must be mentioned that TEGs are also used as heat pumps and/or as generators in