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Search for "microsphere" in Full Text gives 25 result(s) in Beilstein Journal of Nanotechnology.

Plasmonic nanotechnology for photothermal applications – an evaluation

  • A. R. Indhu,
  • L. Keerthana and
  • Gnanaprakash Dharmalingam

Beilstein J. Nanotechnol. 2023, 14, 380–419, doi:10.3762/bjnano.14.33

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Published 27 Mar 2023

Stimuli-responsive polypeptide nanogels for trypsin inhibition

  • Petr Šálek,
  • Jana Dvořáková,
  • Sviatoslav Hladysh,
  • Diana Oleshchuk,
  • Ewa Pavlova,
  • Jan Kučka and
  • Vladimír Proks

Beilstein J. Nanotechnol. 2022, 13, 538–548, doi:10.3762/bjnano.13.45

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  • equations: where ni and Di are the number and diameter of the i-th microsphere, respectively. 125I-radiolabeling and loading and release of BSA and AAT A solution of BSA (10 mg), or AAT (10 mg), in PBS buffer (400 µL, pH 7.4) was reacted with [125I]-NaI solution (155 MBq) for 30 min in the presence of two
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Published 22 Jun 2022

Micro- and nanotechnology in biomedical engineering for cartilage tissue regeneration in osteoarthritis

  • Zahra Nabizadeh,
  • Mahmoud Nasrollahzadeh,
  • Hamed Daemi,
  • Mohamadreza Baghaban Eslaminejad,
  • Ali Akbar Shabani,
  • Mehdi Dadashpour,
  • Majid Mirmohammadkhani and
  • Davood Nasrabadi

Beilstein J. Nanotechnol. 2022, 13, 363–389, doi:10.3762/bjnano.13.31

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  • compounds with diameters from 1 to 1000 μm prepared by physicochemical methods [20]. A microsphere-based controlled release strategy is extensively used in scaffold fabrication because of the remarkable ability of microparticles to serve as carriers for delivery of drugs, bioactive molecules, and growth
  • factors in the microsphere-incorporated scaffolds. Microspheres can be independently assembled and used as building blocks for microsphere-based scaffold structures to provide the desired mechanical properties and improve the capability to control release [21]. Designing a properly controlled release
  • equipped with controlled release systems for chondrogenic differentiation is a major concern of recent investigations. Ansboro et al. have developed a hyaluronan-based chondromimetic microsphere system to deliver transforming growth factor beta 3 (TGF-β3) growth factor for in situ chondrogenic
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Published 11 Apr 2022

Tin dioxide nanomaterial-based photocatalysts for nitrogen oxide oxidation: a review

  • Viet Van Pham,
  • Hong-Huy Tran,
  • Thao Kim Truong and
  • Thi Minh Cao

Beilstein J. Nanotechnol. 2022, 13, 96–113, doi:10.3762/bjnano.13.7

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  • ] synthesized SnO2 microspheres on a fluorine-doped tin oxide (FTO) substrate and the SEM images (Figure 6) show SnO2 microspheres with an average diameter of 2.0–2.5 μm. By using SnO2 microsphere photocatalysts for the photocatalytic oxidation of NO, Le et al. [67] indicated that 3D hierarchical flower-like
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Published 21 Jan 2022

Recent progress in actuation technologies of micro/nanorobots

  • Ke Xu and
  • Bing Liu

Beilstein J. Nanotechnol. 2021, 12, 756–765, doi:10.3762/bjnano.12.59

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  • direction of magnetization of the ISME, f represents the force of friction, ω indicates the rotation velocity of the microsphere, and θ denotes the tilt angle between the direction of the magnetic field and the direction of magnetization of the ISME. (c) Velocity–frequency profiles for ISMEs with different
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Published 20 Jul 2021

A stretchable triboelectric nanogenerator made of silver-coated glass microspheres for human motion energy harvesting and self-powered sensing applications

  • Hui Li,
  • Yaju Zhang,
  • Yonghui Wu,
  • Hui Zhao,
  • Weichao Wang,
  • Xu He and
  • Haiwu Zheng

Beilstein J. Nanotechnol. 2021, 12, 402–412, doi:10.3762/bjnano.12.32

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  • motion energy; silver-coated glass microsphere; single-electrode mode; triboelectric nanogenerator; wearable; Introduction Traditional batteries cannot provide a durable and reliable power supply for small portable electronic devices, personalized healthcare, and Internet-of-Things (IoT) devices [1][2
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Published 03 May 2021

Determination of elastic moduli of elastic–plastic microspherical materials using nanoindentation simulation without mechanical polishing

  • Hongzhou Li and
  • Jialian Chen

Beilstein J. Nanotechnol. 2021, 12, 213–221, doi:10.3762/bjnano.12.17

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  • cannot be controlled. There are no reliable theoretical or experimental methods to evaluate the mechanical behavior during nanoindentation of an elastic–plastic microsphere. Therefore, it is necessary to conduct reliable numerical simulations to evaluate this behavior. This article reports a systematic
  • computational study regarding the instrumented nanoindentation of elastic–plastic microspherical materials. The ratio between elastic modulus of the microsphere and the initial yield stress of the microsphere was systematically varied from 10 to 1000 to cover the mechanical properties of most materials
  • encountered in engineering. The simulated results indicate that contact height is unsuitable to replace contact depth for obtaining the indentation elastic modulus of microspherical materials. The extracted elastic modulus of a microsphere using the Oliver–Pharr method with the simulated unloading curve
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Published 19 Feb 2021

Oxidation of Au/Ag films by oxygen plasma: phase separation and generation of nanoporosity

  • Abdel-Aziz El Mel,
  • Said A. Mansour,
  • Mujaheed Pasha,
  • Atef Zekri,
  • Janarthanan Ponraj,
  • Akshath Shetty and
  • Yousef Haik

Beilstein J. Nanotechnol. 2020, 11, 1608–1614, doi:10.3762/bjnano.11.143

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  • nanospheres (Figure 2d). By further increasing the oxidation time to 30 min, an increase in microsphere size and number is seen at the surface (Figure 2e,f). The evolution of film thickness was examined by SEM cross-section imaging (Figure 3). The results show that the as-grown films exhibit a columnar
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Published 22 Oct 2020

Hierarchical heterostructures of Bi2MoO6 microflowers decorated with Ag2CO3 nanoparticles for efficient visible-light-driven photocatalytic removal of toxic pollutants

  • Shijie Li,
  • Wei Jiang,
  • Shiwei Hu,
  • Yu Liu,
  • Yanping Liu,
  • Kaibing Xu and
  • Jianshe Liu

Beilstein J. Nanotechnol. 2018, 9, 2297–2305, doi:10.3762/bjnano.9.214

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  • [32]. To visually study the microstructure and morphology of Ag2CO3/Bi2MoO6, SEM images of the as-prepared catalysts were taken. Bare Bi2MoO6 presents a hierarchical microsphere structure (diameter: 1.6–3.5 μm, Figure 2a,b). After Ag2CO3 was loaded onto Bi2MoO6, the resulting Ag2CO3/Bi2MoO6 retained
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Published 27 Aug 2018

Two-dimensional photonic crystals increasing vertical light emission from Si nanocrystal-rich thin layers

  • Lukáš Ondič,
  • Marian Varga,
  • Ivan Pelant,
  • Alexander Kromka,
  • Karel Hruška and
  • Robert G. Elliman

Beilstein J. Nanotechnol. 2018, 9, 2287–2296, doi:10.3762/bjnano.9.213

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  • for photonic nanostructures, such as nanoimprinting [13][16], microsphere-based lithography [17] or laser processing [18], which may open up ways towards practical applications of 2D PhCs. The latter method, for example, enabled to enhance the light extraction from InGaN/GaN quantum wells on a
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Published 24 Aug 2018

Light extraction efficiency enhancement of flip-chip blue light-emitting diodes by anodic aluminum oxide

  • Yi-Ru Huang,
  • Yao-Ching Chiu,
  • Kuan-Chieh Huang,
  • Shao-Ying Ting,
  • Po-Jui Chiang,
  • Chih-Ming Lai,
  • Chun-Ping Jen,
  • Snow H. Tseng and
  • Hsiang-Chen Wang

Beilstein J. Nanotechnol. 2018, 9, 1602–1612, doi:10.3762/bjnano.9.152

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  • , abbreviated as YAP:Ce) and reduced the total reflection of light via surface roughening. The LEE of the LED was approximately two times that of traditional LEDs [16]. The use of a high-index-contrast photonic crystal [17][18] and colloidal-based microsphere arrays in conventional top-emitting LEDs [19], and
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Published 30 May 2018

Optical near-field mapping of plasmonic nanostructures prepared by nanosphere lithography

  • Gitanjali Kolhatkar,
  • Alexandre Merlen,
  • Jiawei Zhang,
  • Chahinez Dab,
  • Gregory Q. Wallace,
  • François Lagugné-Labarthet and
  • Andreas Ruediger

Beilstein J. Nanotechnol. 2018, 9, 1536–1543, doi:10.3762/bjnano.9.144

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  • measurements can be easily performed without heavy experimental devices or complicated posttreatment analysis. Methods Sample preparation The samples were fabricated by nanosphere lithography. A solution of 1 µm diameter polystyrene microsphere mixed with ethanol was deposited on a dry, clean microscope glass
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Published 23 May 2018

Cr(VI) remediation from aqueous environment through modified-TiO2-mediated photocatalytic reduction

  • Rashmi Acharya,
  • Brundabana Naik and
  • Kulamani Parida

Beilstein J. Nanotechnol. 2018, 9, 1448–1470, doi:10.3762/bjnano.9.137

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Published 16 May 2018

A simple extension of the commonly used fitting equation for oscillatory structural forces in case of silica nanoparticle suspensions

  • Sebastian Schön and
  • Regine von Klitzing

Beilstein J. Nanotechnol. 2018, 9, 1095–1107, doi:10.3762/bjnano.9.101

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  • are obtained, namely wavelength, amplitude and decay length, which are related to the period, the strength and the correlation length of the oscillatory structural forces, respectively. The paper addresses structural forces between a silica microsphere and a silicon wafer across silica nanoparticle
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Published 05 Apr 2018

Facile synthesis of a ZnO–BiOI p–n nano-heterojunction with excellent visible-light photocatalytic activity

  • Mengyuan Zhang,
  • Jiaqian Qin,
  • Pengfei Yu,
  • Bing Zhang,
  • Mingzhen Ma,
  • Xinyu Zhang and
  • Riping Liu

Beilstein J. Nanotechnol. 2018, 9, 789–800, doi:10.3762/bjnano.9.72

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  • remarkably decreased. The particle size further diminishes with the addition of ZnO (B-3, Figure S1b, Supporting Information File 1). When the Zn/Bi ratio becomes 1:3 (Figure 2b), the exfoliated BiOI ultrathin layers assemble together to spontaneously form a hierarchical microsphere to reduce the surface
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Published 05 Mar 2018

Surface-plasmon-enhanced ultraviolet emission of Au-decorated ZnO structures for gas sensing and photocatalytic devices

  • T. Anh Thu Do,
  • Truong Giang Ho,
  • Thu Hoai Bui,
  • Quang Ngan Pham,
  • Hong Thai Giang,
  • Thi Thu Do,
  • Duc Van Nguyen and
  • Dai Lam Tran

Beilstein J. Nanotechnol. 2018, 9, 771–779, doi:10.3762/bjnano.9.70

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  • . The higher magnification clearly shows that each sub-micrometer sphere is assembled from numerous nanorods pointing toward the center of the microsphere. Figure 1c reveals the formation of spherically shaped Au nanopaticles on the surface of ZnO sub-micrometer spheres. Au nanoparticles were adsorbed
  • manner, the hot electron under photoexcitation pumping from the plasmonic metal to the semiconductor can be limited due to the high depletion barrier of the metal-oxide surfaces [1], resulting in the reduction of photocatalytic activity. From the above results, the synthesized ZnO microsphere particles
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Published 01 Mar 2018

Synthesis of graphene–transition metal oxide hybrid nanoparticles and their application in various fields

  • Arpita Jana,
  • Elke Scheer and
  • Sebastian Polarz

Beilstein J. Nanotechnol. 2017, 8, 688–714, doi:10.3762/bjnano.8.74

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Published 24 Mar 2017

Single-molecule mechanics of protein-labelled DNA handles

  • Vivek S. Jadhav,
  • Dorothea Brüggemann,
  • Florian Wruck and
  • Martin Hegner

Beilstein J. Nanotechnol. 2016, 7, 138–148, doi:10.3762/bjnano.7.16

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  • high-resolution dual trap OT. f) End-labelled DIG-λ-DNA-biotin bound to an anti-DIG bead (3.4 μm) held by a micropipette. Flow forces elongate the λ-DNA molecule that is tethered at one end to the microsphere. The streptavidin-modified end (labelled with quantum dots) is freely floating in the
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Published 29 Jan 2016

Improved optical limiting performance of laser-ablation-generated metal nanoparticles due to silica-microsphere-induced local field enhancement

  • Zheren Du,
  • Lianwei Chen,
  • Tsung-Sheng Kao,
  • Mengxue Wu and
  • Minghui Hong

Beilstein J. Nanotechnol. 2015, 6, 1199–1204, doi:10.3762/bjnano.6.122

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  • the finite-difference time-domain (FDTD) method with the Lumerical software for predicting the enhancement of the optical nonlinearity by the microspheres. The refractive index of the environment (water) was set at 1.33, while the refractive index of the silica microsphere was set at 1.51. It is
  • observed that the light energy in the area near the silica microsphere is enhanced due to its focusing effect. The enhancement of the light energy is ≈1.4 times higher than the incident light at the center of the enhanced area. The enhancement of the optical nonlinearity is attributed to the local field
  • and gold/silica nanocomposites and (c,d) silver nanoparticles and silver/silica nanocomposites. (a) SEM image of silica microspheres and (b) FDTD simulation result for a silica microsphere with a diameter of 1 µm under 1064 nm laser irradiation. Field enhancement by microspheres of different sizes
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Published 22 May 2015

A simple approach to the synthesis of Cu1.8S dendrites with thiamine hydrochloride as a sulfur source and structure-directing agent

  • Xiaoliang Yan,
  • Sha Li,
  • Yun-xiang Pan,
  • Zhi Yang and
  • Xuguang Liu

Beilstein J. Nanotechnol. 2015, 6, 881–885, doi:10.3762/bjnano.6.90

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  • Bi2S3 without a template [11]. Li et al. demonstrated that L-cysteine could assist the formation of snowflake-like patterns and flower-like microspheres as well as porous hollow microsphere CuS structures [12]. Thiamine, abundant and inexpensive, contains one sulfur atom and is supposed to be used as a
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Published 01 Apr 2015

Silica micro/nanospheres for theranostics: from bimodal MRI and fluorescent imaging probes to cancer therapy

  • Shanka Walia and
  • Amitabha Acharya

Beilstein J. Nanotechnol. 2015, 6, 546–558, doi:10.3762/bjnano.6.57

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  • analysis whereas the inductively coupled plasma optical emission spectroscopy was used to determine the amount of QDs and magnetic NPs inside the silica shell. The studies suggested 4600 ± 1400 QDs and 13000 ± 3700 magnetic NPs for each microsphere. Such strategies were also followed by Xiao et al. [50
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Published 24 Feb 2015

Antimicrobial nanospheres thin coatings prepared by advanced pulsed laser technique

  • Alina Maria Holban,
  • Valentina Grumezescu,
  • Alexandru Mihai Grumezescu,
  • Bogdan Ştefan Vasile,
  • Roxana Truşcă,
  • Rodica Cristescu,
  • Gabriel Socol and
  • Florin Iordache

Beilstein J. Nanotechnol. 2014, 5, 872–880, doi:10.3762/bjnano.5.99

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  • in the micrometric range. The average diameter of PLGA–PVA, PLGA–PVA–BSA (bovine serum albumin) and PLGA–PVA–CS particles ranged from 180 to 250 nm. Grumezescu et al., [34], reported the MAPLE fabrication of PLA–PVA–UA microsphere thin coatings. These thin coatings possessed a homogeneous shape and
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Published 18 Jun 2014

Growth behaviour and mechanical properties of PLL/HA multilayer films studied by AFM

  • Cagri Üzüm,
  • Johannes Hellwig,
  • Narayanan Madaboosi,
  • Dmitry Volodkin and
  • Regine von Klitzing

Beilstein J. Nanotechnol. 2012, 3, 778–788, doi:10.3762/bjnano.3.87

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  • ). As with the precursor layer, PEI was adsorbed under the same conditions as other polymers. Before use, polyelectrolyte solutions were filtered through a 0.22 μm filter. The films were stored in Tris-buffer containing 0.15 M NaCl at 4 °C and never allowed to dry during the measurements. Microsphere
  • on different lateral positions. Elasticity measurements Force measurements were performed with a commercial MFP-3D instrument (Asylum Research, CA, USA) by using the calibrated cantilevers with an attached silica microsphere. All measurements on (PLL/HA)n films were performed in a tris-buffer
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Published 21 Nov 2012

Colloidal lithography for fabricating patterned polymer-brush microstructures

  • Tao Chen,
  • Debby P. Chang,
  • Rainer Jordan and
  • Stefan Zauscher

Beilstein J. Nanotechnol. 2012, 3, 397–403, doi:10.3762/bjnano.3.46

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  • , USA Department of Physical Chemistry, Lund University, SE-221 00 Lund, Sweden 10.3762/bjnano.3.46 Abstract We exploit a series of robust, but simple and convenient colloidal lithography (CL) approaches, using a microsphere array as a mask or as a guiding template, and combine this with surface
  • : atom-transfer radical polymerization; colloidal lithography; patterning; self-assembled microsphere monolayer; Introduction It is well known that monodisperse colloidal microspheres easily self-assemble into hexagonally close-packed arrays on surfaces as a result of capillary forces arising from the
  • technique for a large number of researchers in the field of micro/nanofabrication [2][3][4][6]. A variety of lithographic methods have since been developed, in which colloid microsphere arrays are used as masks for depositing nanomaterials and as scaffolds for templating 2-D or 3-D functional patterns [2][3
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Published 15 May 2012

Switching adhesion forces by crossing the metal–insulator transition in Magnéli-type vanadium oxide crystals

  • Bert Stegemann,
  • Matthias Klemm,
  • Siegfried Horn and
  • Mathias Woydt

Beilstein J. Nanotechnol. 2011, 2, 59–65, doi:10.3762/bjnano.2.8

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  • . However, such tips are disadvantageous for quantitative measurements of interfacial forces, because reliable and accurate determination of the tip geometry and also comparison with theoretical predictions are difficult. In contrast, utilizing a microsphere attached to the free end of the cantilever
  • , is thus better suited for quantitative and comparative adhesion force measurements [22][23][24]. Previously, the applicability and the sensitivity of the AFM in the spherical probe configuration (i.e., with a microsphere as a probe tip) operated under ultrahigh vacuum conditions for the
  • contribution of the overall adhesion force. However, reference measurements with a silica microsphere on V3O5 showed the same qualitative behavior, i.e., a lower adhesion force in the metallic state. Accordingly, a possible tip-induced electrostatic contact charging is negligible. Conclusion The adhesion
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Published 27 Jan 2011
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