Silver-based SERS substrates fabricated using a 3D printed microfluidic device

• Phommachith Sonexai,
• Minh Van Nguyen,
• Bui The Huy and
• Yong-Ill Lee

Beilstein J. Nanotechnol. 2023, 14, 793–803, doi:10.3762/bjnano.14.65

• of uniform mixing [18]. In addition, nanoparticles tend to accumulate on the sidewalls of the microfluidic channel, thus limiting the reuse of the device [8][19]. In contrast, droplet-based microfluidic devices are based on the formation of microdroplets using two or more immiscible fluids with

Systematic studies into uniform synthetic protein nanoparticles

• Nahal Habibi,
• Ava Mauser,
• Jeffery E. Raymond and
• Joerg Lahann

Beilstein J. Nanotechnol. 2022, 13, 274–283, doi:10.3762/bjnano.13.22

• , the bias between the jetting needle and collection substrate. A stable jet is achieved with the assistance of a constant pumping rate, to generate a Taylor cone that resolves into individual microdroplets that contain a very limited amount of macromolecules. During travel from the onset of the cone

Comprehensive review on ultrasound-responsive theranostic nanomaterials: mechanisms, structures and medical applications

• Sepand Tehrani Fateh,
• Lida Moradi,
• Elmira Kohan,
• Michael R. Hamblin and
• Amin Shiralizadeh Dezfuli

Beilstein J. Nanotechnol. 2021, 12, 808–862, doi:10.3762/bjnano.12.64

• lesions after vaporization of microdroplets or NDs used as cavitation nuclei during HIFU treatment [120][121][122]. In addition to being a relatively time-consuming procedure, HIFU has the risk of promoting off-target heating of healthy surrounding tissue. One possible solution is the use of targeted MBs

Time-resolved universal temperature measurements using NaYF₄:Er³⁺,Yb³⁺ upconverting nanoparticles in an electrospray jet

• Kristina Shrestha,
• Arwa A. Alaulamie,
• Ali Rafiei Miandashti and
• Hugh H. Richardson

Beilstein J. Nanotechnol. 2018, 9, 2916–2924, doi:10.3762/bjnano.9.270

• understand temperature-dependent reactions such as protein unfolding inside microjet/microdroplets and microfluidic systems. Keywords: electrospray; microjet; nanothermometry; temperature measurement; time-resolved measurement; upconverting nanoparticles; Introduction There is need and interest to non

• measurements inside the Taylor cone. We believe that the findings of this paper provide a foundation for time-resolved temperature measurements using NaYF4:Er3+,Yb3+ UCNPs and can be used to understand temperature dependent reactions like protein unfolding phenomenon inside the microjet/microdroplets

Optical orientation of nematic liquid crystal droplets via photoisomerization of an azodendrimer dopant

• Sergey A. Shvetsov,
• Alexander V. Emelyanenko,
• Natalia I. Boiko,
• Alexander S. Zolot'ko,
• Yan-Song Zhang,
• Jui-Hsiang Liu and
• Alexei R. Khokhlov

Beilstein J. Nanotechnol. 2018, 9, 870–879, doi:10.3762/bjnano.9.81

• between the surface and the bulk. Recently, it was shown that NLC photo-orientation due to the azobenzene dopant photoisomerization can also occur at the interface between nematic and isotropic liquid [28]. It is known [29] that NLC microdroplets in the bulk of glycerol usually have bipolar orientational

• NLC droplets, i.e., with or without dopant the NLC director distribution of microdroplets was bipolar. However, under near-UV light illumination, the bipolar orientation of NLC droplets changed to a radial orientation. In addition, the photoinduced change in the NLC director distribution was observed

• droplets in the bulk of glycerol Structural transformations were investigated for the droplets of NLC doped with the azobenzene dendrimer (G5) in glycerol environment. The microdroplets (with diameter d ≈ 30 μm) of NLC in the bulk of glycerol have the same bipolar structure with two point defects on the

Tuning adhesion forces between functionalized gold colloidal nanoparticles and silicon AFM tips: role of ligands and capillary forces

• Sven Oras,
• Sergei Vlassov,
• Marta Berholts,
• Rünno Lõhmus and
• Karine Mougin

Beilstein J. Nanotechnol. 2018, 9, 660–670, doi:10.3762/bjnano.9.61

• surface treatment. One approach is the functionalization of the surfaces with various ligands. For instance, grafting a thin molecular film with hydrophobic tail groups on a surface, formed by self-assembly process, prevents the formation of nano- or microdroplets of water on the treated sample, or

Temperature-tunable lasing from dye-doped chiral microdroplets encapsulated in a thin polymeric film

• Gia Petriashvili,
• Mauro Daniel Luigi Bruno,
• Maria Penelope De Santo and
• Riccardo Barberi

Beilstein J. Nanotechnol. 2018, 9, 379–383, doi:10.3762/bjnano.9.37

• 87036, Italy 10.3762/bjnano.9.37 Abstract In the last decade, much interest has grown around the possibility to use liquid-crystal droplets as optical microcavities and lasers. In particular, 3D laser emission from dye-doped cholesteric liquid crystals confined inside microdroplets paves the way for

• from an emulsion having a mixture of water and polyvinyl alcohol as isotropic matrix has been reported. After the water evaporation, a polymeric film in which the microdroplets are encapsulated has been obtained. Bragg-type laser emission has been recorded from the emulsion as well as from the thin

• the field of sensors and for the development of anti-counterfeiting labels. Keywords: chiral microdroplets; dye-doped cholesteric liquid crystals; laser; polymeric films; temperature tuning; Introduction Liquid crystalline materials show peculiar optical properties. Cholesteric liquid crystals (CLCs

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

• results in an improved electrochemical performance [172]. Symmetric supercapacitors are based on Co3O4 NPs on vertically aligned graphene. This hybrid has also been used for nonenzymatic glucose detection in microdroplets [173]. Wang et al. fabricated graphene–Co3O4 hybrid electrodes constructed on a

Poly(styrene)/oligo(fluorene)-intercalated fluoromica hybrids: synthesis, characterization and self-assembly

• Giuseppe Leone,
• Francesco Galeotti,
• William Porzio,
• Guido Scavia,
• Luisa Barba,
• Gianmichele Arrighetti,
• Giovanni Ricci,
• Chiara Botta and
• Umberto Giovanella

Beilstein J. Nanotechnol. 2014, 5, 2450–2458, doi:10.3762/bjnano.5.254

• conditions [34]. This is a clear indication that the polymer is not able to stabilize the water droplets forming at the solution/air interface, so that the microdroplets are free to float around and to coalesce in a disordered way. In order to increase the hydrophilicity of the system and hence the ability

Continuous parallel ESI-MS analysis of reactions carried out in a bespoke 3D printed device

• Jennifer S. Mathieson,
• Mali H. Rosnes,
• Victor Sans,
• Philip J. Kitson and
• Leroy Cronin

Beilstein J. Nanotechnol. 2013, 4, 285–291, doi:10.3762/bjnano.4.31

• include fluidic devices coupled to on-line ESI-MS, for example to observe and analyse microdroplets from a microreactor [18]. More recently, Ley et al. reported a continuous flow reaction, which was monitored by on-line ESI-MS [1], in which a six-way valve was used to send aliquots directly to the MS for

Sorting of droplets by migration on structured surfaces

• Wilfried Konrad and
• Anita Roth-Nebelsick

Beilstein J. Nanotechnol. 2011, 2, 215–221, doi:10.3762/bjnano.2.25

• Wilfried Konrad Anita Roth-Nebelsick University of Tübingen, Institute for Geosciences, Sigwartstrasse 10, D-72076 Tübingen, Germany State Museum of Natural History Stuttgart, Rosenstein 1, D-70191 Stuttgart, Germany 10.3762/bjnano.2.25 Abstract Background: Controlled transport of microdroplets

• . In our approach, it is essentially the surface structure which is varied, not the contact angle. It may be speculated that suitably patterned surfaces are also utilised in biological surfaces where a large variety of ornamentations and surface structuring are often observed. Keywords: microdroplets

• μm-range which are deposited during fog or mist events. Specifically shaped surface patterns may be able to repel not only large water drops but also direct microdroplets according to specific strategies. Sphere like droplets of fluid #1 (grey) attached to an axially symmetric solid cone (the broken