Results 81 to 90 of about 6,093 (220)

External Reflection From Two‐Photon Laser‐Printed Micromirrors Enables Photomechanical Actuation at a 90° Incident Angle

open access: yesAdvanced Functional Materials, EarlyView.
Light reflectance increases along incidence angle and transmittance significantly drops around 90‐degree incidence angle. Here, we report two‐photon laser printed micro mirrors that redirect the skimming light beam into normal light absorption. Using this technique, light‐driven micro walkers and grippers are demonstrated by using grazing incidence ...
Leilei Song, Jianfeng Yang, Hao Zeng
wiley   +1 more source

Reversible low-light induced photoswitching of crowned spiropyran-DO3A complexed with gadolinium(III) ions. [PDF]

open access: yes, 2012
Photoswitchable spiropyran has been conjugated to the crowned ring system DO3A, which improves its solubility in dipolar and polar media and stabilizes the merocyanine isomer. Adding the lanthanide ion gadolinium(III) to the macrocyclic ring system leads
Brueggemann, Chantal   +6 more
core   +4 more sources

Photoswitchable NIR‐Emitting Gold Nanoparticles [PDF]

open access: yesAngewandte Chemie International Edition, 2016
AbstractPhoto‐switching of the NIR emission of gold nanoparticles (GNP) upon photo‐isomerization of azobenzene ligands, bound to the surface, is demonstrated. Photophysical results confirm the occurrence of an excitation energy transfer process from the ligands to the GNP that produces sensitized NIR emission.
BONACCHI, SARA   +10 more
openaire   +3 more sources

Two Material Properties from One Wavelength‐Orthogonal Photoresin Enabled by a Monochromatic Laser Integrated Stereolithographic Apparatus (Mono LISA)

open access: yesAdvanced Materials, Volume 37, Issue 13, April 2, 2025.
A single object with dual properties – degradable and non‐degradable – is fabricated in a single print simply by switching the printing colors. The advanced multi‐material printing is enabled by the combination of a fully wavelength‐orthogonal photoresin and a monochromatic tunable laser printer, paving the way for precise multi‐material ...
Xingyu Wu   +5 more
wiley   +1 more source

A combinatorial approach to improving the performance of azoarene photoswitches

open access: yesBeilstein Journal of Organic Chemistry, 2019
Azoarenes remain privileged photoswitches – molecules that can be interconverted between two states using light – enabling a huge range of light addressable multifunctional systems and materials.
Joaquin Calbo   +4 more
doaj   +1 more source

Hemipiperazines as peptide-derived molecular photoswitches with low-nanomolar cytotoxicity

open access: yesNature Communications, 2022
The development of photochromic systems is an important and growing area of research, in particular for bioactive molecular photoswitches. Here, the authors report on photopharmacological antimitotic agents, operational under visible light, based on a ...
Susanne Kirchner   +7 more
doaj   +1 more source

Precise Regulation of Membrane Proteins: From Physical Technology to Biomolecular Strategy

open access: yesAdvanced Science, EarlyView.
This review summarizes the emerging strategies for the precise regulation of membrane proteins using physical stimuli and biomolecule‐based tools. These methods provide new insights into cell regulation and offer promising directions for future disease treatment.
Xiu Zhao   +6 more
wiley   +1 more source

Visible‐Light‐Driven Fluorescence Turn‐on Photoswitches With Near Quantitative Photocyclization Yield

open access: yesAdvanced Science
Photoswitchable fluorescent materials have gained significant attention for their potential in advanced information encryption and anti‐counterfeiting applications.
Jiawei Zhai   +4 more
doaj   +1 more source

Density functional theoretical studies on photoswitching and charge migration dynamics of thio and selenoureidopeptides [PDF]

open access: yes, 2017
Density functional theoretical calculations have been performed to investigate the changes in electronic structure at ground and excited states of ureidopeptides on substitution with higher chalcogens like sulphur and selenium for oxygen.
Joy, S.   +2 more
core   +1 more source

Photoswitchable Sexithiophene-Based Molecular Wires [PDF]

open access: yesOrganic Letters, 2009
Photochromic sexithiophenes were prepared by oxidative electrochemical coupling of terthiophenes. The redox properties in the open state are typical of sexithiophenes. Ring closure of both photochromic units leads to a decrease in the energy of the LUMO orbitals with little affect on the energy of the HOMO orbitals.
Areephong, Jetsuda   +6 more
openaire   +3 more sources

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