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Search for "near-infrared" in Full Text gives 140 result(s) in Beilstein Journal of Nanotechnology.

Luminescent gold nanoclusters for bioimaging applications

  • Nonappa

Beilstein J. Nanotechnol. 2020, 11, 533–546, doi:10.3762/bjnano.11.42

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  • of colors covering ultraviolet to near-infrared (NIR). Furthermore, SCQDs offer better sensitivity, stability against photobleaching, and a narrow spectral bandwidth compared to conventional organic dyes. However, due to their cytotoxicity, the tendency to undergo aggregation inside the cells, and
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Published 30 Mar 2020

Multilayer capsules made of weak polyelectrolytes: a review on the preparation, functionalization and applications in drug delivery

  • Varsha Sharma and
  • Anandhakumar Sundaramurthy

Beilstein J. Nanotechnol. 2020, 11, 508–532, doi:10.3762/bjnano.11.41

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Published 27 Mar 2020

Using gold nanoparticles to detect single-nucleotide polymorphisms: toward liquid biopsy

  • María Sanromán Iglesias and
  • Marek Grzelczak

Beilstein J. Nanotechnol. 2020, 11, 263–284, doi:10.3762/bjnano.11.20

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  • optical properties not only in the visible but also in the near-infrared spectral range. Shape anisotropy (rods) and regiospecific surface functionalization (tip versus lateral parts) enable the fabrication of colloidal systems with limited degrees of freedom. In such systems, the possible orientations of
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Published 31 Jan 2020

Phase inversion-based nanoemulsions of medium chain triglyceride as potential drug delivery system for parenteral applications

  • Eike Folker Busmann,
  • Dailén García Martínez,
  • Henrike Lucas and
  • Karsten Mäder

Beilstein J. Nanotechnol. 2020, 11, 213–224, doi:10.3762/bjnano.11.16

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  • – high glucose (DMEM), fetal calf serum (FCS), penicillin-streptomycin, ʟ-glutamine solution and sodium pyruvate solution as well as the fluorescent dye resazurin sodium salt were purchased from Sigma-Aldrich Chemie GmbH (Germany, Steinheim). The near infrared fluorescent dye DiR was purchased from
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Published 17 Jan 2020

Rational design of block copolymer self-assemblies in photodynamic therapy

  • Maxime Demazeau,
  • Laure Gibot,
  • Anne-Françoise Mingotaud,
  • Patricia Vicendo,
  • Clément Roux and
  • Barbara Lonetti

Beilstein J. Nanotechnol. 2020, 11, 180–212, doi:10.3762/bjnano.11.15

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  • is an example of “all in one“ nanomedicine used for chemotherapy combining loading with doxorubicin, PDT and PTT. This is possible thanks to the activation of the photosensitizer and multimodal imaging using the fluorescence of the photosensitizer (near-infrared fluorescence imaging, NIRFI) and the
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Published 15 Jan 2020

Plasmonic nanosensor based on multiple independently tunable Fano resonances

  • Lin Cheng,
  • Zelong Wang,
  • Xiaodong He and
  • Pengfei Cao

Beilstein J. Nanotechnol. 2019, 10, 2527–2537, doi:10.3762/bjnano.10.243

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  • proposed a compact plasmonic nanosensor, which is composed of one MDM waveguide, two side-coupled stubs, and three gap-coupled resonators (a T-shaped, a ring and a split-ring, respectively). The transmission features of the structure are numerically simulated in the near-infrared spectrum at 1000 to 2000
  • . Next, we selected typical structures published in recent years for comparison [28][29], and the results are shown in Table 1 below. Obviously, the structure we propose has the most resonance peaks, covering a wavelength range of about 1000–2000 nm in the near-infrared region with relatively high
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Published 17 Dec 2019

Coating of upconversion nanoparticles with silica nanoshells of 5–250 nm thickness

  • Cynthia Kembuan,
  • Maysoon Saleh,
  • Bastian Rühle,
  • Ute Resch-Genger and
  • Christina Graf

Beilstein J. Nanotechnol. 2019, 10, 2410–2421, doi:10.3762/bjnano.10.231

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  • nanocrystals have gained importance as inorganic optical reporters in recent years [1][2][3]. The doping of inorganic host NaYF4 matrices with different optically active lanthanide ions can result in so-called upconversion nanoparticles (UCNP) which can absorb photons of lower energy (e.g., near-infrared (NIR
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Published 09 Dec 2019

Deterministic placement of ultra-bright near-infrared color centers in arrays of silicon carbide micropillars

  • Stefania Castelletto,
  • Abdul Salam Al Atem,
  • Faraz Ahmed Inam,
  • Hans Jürgen von Bardeleben,
  • Sophie Hameau,
  • Ahmed Fahad Almutairi,
  • Gérard Guillot,
  • Shin-ichiro Sato,
  • Alberto Boretti and
  • Jean Marie Bluet

Beilstein J. Nanotechnol. 2019, 10, 2383–2395, doi:10.3762/bjnano.10.229

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  • the near-infrared, there is a need to improve the spontaneous emission rate for room-temperature applications such as magnetic sensing and SPSs. For all the above applications, the fluorescence emission enhancement of the color centers is a crucial issue for room-temperature applications, specifically
  • ) [53]. Here, we focus on the enhancement of the emission of the VSi, VSiVC and NCVSi/4H-SiC platforms aiming at increasing the photon collection efficiency of many emitters to improve the resolution of quantum sensing in biomedical imaging applications due to the favorable emission in the near-infrared
  • near-infrared color centers in SiC using hydrogen irradiation and annealing at different temperatures. We have optimized the enhancement of color centers relevant for quantum sensing applications, such as silicon monovacancies and divacancies, and nitrogen vacancies. Due to the high fluence during
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Published 05 Dec 2019

Liquid crystal tunable claddings for polymer integrated optical waveguides

  • José M. Otón,
  • Manuel Caño-García,
  • Fernando Gordo,
  • Eva Otón,
  • Morten A. Geday and
  • Xabier Quintana

Beilstein J. Nanotechnol. 2019, 10, 2163–2170, doi:10.3762/bjnano.10.209

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  • circuits (EICs), where signals are carried out by visible and near-infrared (NIR) photons rather than electrons. EICs have irreversibly modified our way of life through computers, communications and consumer electronics. Since their origin in 1954, EICs have been exponentially increasing the number of
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Published 05 Nov 2019

Porous silver-coated pNIPAM-co-AAc hydrogel nanocapsules

  • William W. Bryan,
  • Riddhiman Medhi,
  • Maria D. Marquez,
  • Supparesk Rittikulsittichai,
  • Michael Tran and
  • T. Randall Lee

Beilstein J. Nanotechnol. 2019, 10, 1973–1982, doi:10.3762/bjnano.10.194

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  • -isopropylacrylamide (NIPAM) and acrylic acid (AAc). The hydrogel cores were then encased within either a porous or complete silver shell for which the localized surface plasmon resonance (LSPR) extends from visible to near-infrared (NIR) wavelengths (i.e., λmax varies from 550 to 1050 nm, depending on the porosity
  • advantages over bulk materials in terms of reactive surface area, mobility, carrier capacity, bioavailability, and absorption/scattering across a broad range of wavelengths, even into the near-infrared (NIR) [7][8][9][10]. Nanostructured composites have been reported in a variety of shapes, sizes, and
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Published 04 Oct 2019

Engineered superparamagnetic iron oxide nanoparticles (SPIONs) for dual-modality imaging of intracranial glioblastoma via EGFRvIII targeting

  • Xianping Liu,
  • Chengjuan Du,
  • Haichun Li,
  • Ting Jiang,
  • Zimiao Luo,
  • Zhiqing Pang,
  • Daoying Geng and
  • Jun Zhang

Beilstein J. Nanotechnol. 2019, 10, 1860–1872, doi:10.3762/bjnano.10.181

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  • visualization of pathophysiological processes with high sensitivity but with relatively low spatial resolution and shallow penetration into the tissue [30][31]. Cyanine7.5 NHS ester (Cy7.5), a near infrared fluorescence dye, has attracted extensive attention from researchers in various fields, including optical
  • nanoprobe which could be specifically accumulated in EGFRvIII-positive glioblastoma. The DSPE-PEG-Cy7.5 system was chosen as Cy7.5 is a widespread near-infrared dye with a long emission wavelength and has been applied extensively as a live imaging agent in the biomedical field. The as-synthesized DSPE-PEG
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Published 11 Sep 2019

Fe3O4 nanoparticles as a saturable absorber for giant chirped pulse generation

  • Ji-Shu Liu,
  • Xiao-Hui Li,
  • Abdul Qyyum,
  • Yi-Xuan Guo,
  • Tong Chai,
  • Hua Xu and
  • Jie Jiang

Beilstein J. Nanotechnol. 2019, 10, 1065–1072, doi:10.3762/bjnano.10.107

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  • have been found to produce a charge transfer [5]. Because of the scattering loss, the material absorbs less near infrared (NIR) laser radiation in the NIR-II wavelength range (1000–1300 nm) and the light can penetrate more deeply into the material [6]. In the NIR wavelength region, the optical
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Published 20 May 2019

Revisiting semicontinuous silver films as surface-enhanced Raman spectroscopy substrates

  • Malwina Liszewska,
  • Bogusław Budner,
  • Małgorzata Norek,
  • Bartłomiej J. Jankiewicz and
  • Piotr Nyga

Beilstein J. Nanotechnol. 2019, 10, 1048–1055, doi:10.3762/bjnano.10.105

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  • efficiently absorb and/or scatter visible and near infrared electromagnetic radiation [1]. The origin of the above phenomena lies in localized surface plasmon resonances (LSPR). LSPRs are light induced oscillations of free electrons in metallic nanostructures. The spectral position of an LSPR depends on the
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Published 15 May 2019
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  • the absence of blinking or bleaching, and the possibility to excite in the red or near infrared spectral range, where most matrixes and substrates have low fluorescence background [13][17]. Therefore, due to the increasing demand for ultrasensitive identification and quantification of specific
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Published 10 May 2019

Tungsten disulfide-based nanocomposites for photothermal therapy

  • Tzuriel Levin,
  • Hagit Sade,
  • Rina Ben-Shabbat Binyamini,
  • Maayan Pour,
  • Iftach Nachman and
  • Jean-Paul Lellouche

Beilstein J. Nanotechnol. 2019, 10, 811–822, doi:10.3762/bjnano.10.81

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  • for the targeted treatment of cancer, in which a light-responsive material is irradiated with a laser in the near-infrared range. In the current article we present WS2 nanotubes functionalized with previously reported ceric ammonium nitrate–maghemite (CAN-mag) nanoparticles, used for PTT
  • accumulate on the tumor area, absorb light, and release it as heat, killing the cancerous cells. The light is generated by a laser, in a near-infrared (NIR) wavelength range (750–1000 nm). NIR irradiation has low off-target interaction and a high penetration depth of ca. 1–2 cm in the human body. PTT
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Published 02 Apr 2019

An iridescent film of porous anodic aluminum oxide with alternatingly electrodeposited Cu and SiO2 nanoparticles

  • Menglei Chang,
  • Huawen Hu,
  • Haiyan Quan,
  • Hongyang Wei,
  • Zhangyi Xiong,
  • Jiacong Lu,
  • Pin Luo,
  • Yaoheng Liang,
  • Jianzhen Ou and
  • Dongchu Chen

Beilstein J. Nanotechnol. 2019, 10, 735–745, doi:10.3762/bjnano.10.73

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  • measured using an ultraviolet–visible–near infrared (UV–vis–NIR) spectrophotometer (UV-4100, Hitachi, Japan). Microstructure observation and phase-composition analyses were performed using a TD-3500 X-ray diffraction (XRD) instrument. For measuring the thickness of the thin films formed on the sample, the
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Published 19 Mar 2019

Commercial polycarbonate track-etched membranes as substrates for low-cost optical sensors

  • Paula Martínez-Pérez and
  • Jaime García-Rupérez

Beilstein J. Nanotechnol. 2019, 10, 677–683, doi:10.3762/bjnano.10.67

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  • this purpose, we firstly characterized their optical response in the near-infrared range. This response is an interference fringe pattern, characteristic of a Fabry–Pérot interferometer, which is an optical device typically used for sensing purposes. Afterwards, several refractive index sensing
  • ) interferometer. This porous silicon structure has long been used for sensing [6] and we hypothesized that PCTE membranes might have the same optical response and be useful for sensing purposes, too. To study the utility of PCTE membranes for sensing purposes, we characterized their optical response in the near
  • infrared (NIR) region, optimized the material by placing a polished silicon surface under the PCTE membrane, and performed sensing experiments with different concentrations of ethanol. In this way, we have demonstrated for the first time to our knowledge that PCTE membranes are suitable for sensing RI
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Published 07 Mar 2019

Ceria/polymer nanocontainers for high-performance encapsulation of fluorophores

  • Kartheek Katta,
  • Dmitry Busko,
  • Yuri Avlasevich,
  • Katharina Landfester,
  • Stanislav Baluschev and
  • Rafael Muñoz-Espí

Beilstein J. Nanotechnol. 2019, 10, 522–530, doi:10.3762/bjnano.10.53

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  • optical response of nanometric systems not only by quenching dramatically the fluorescence but also by photooxidation of the organic dye [21]. This effect is an additional source of uncertainty for quantitative measurements in life sciences [22][23]. Near-infrared (NIR) light undergoes less diffuse
  • autofluorescence of living cells is negligible in the near-infrared region [24][25]. In this work, we have chosen a specific fluorescent dye molecule, i.e., terrylene diimide (TDI), which shows intense fluorescence in the NIR spectral region of the electromagnetic spectrum, to be encapsulated in polymeric
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Published 22 Feb 2019

Geometrical optimisation of core–shell nanowire arrays for enhanced absorption in thin crystalline silicon heterojunction solar cells

  • Robin Vismara,
  • Olindo Isabella,
  • Andrea Ingenito,
  • Fai Tong Si and
  • Miro Zeman

Beilstein J. Nanotechnol. 2019, 10, 322–331, doi:10.3762/bjnano.10.31

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  • scattering of photons in the near infrared region of the spectrum, where absorption in c-Si is weak. However, charge-collection efficiency suffers, resulting in low Voc and FF and a reduced quantum efficiency, particularly in the visible part of the spectrum. This setback could be avoided by deploying a
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Published 31 Jan 2019

Thermal control of the defunctionalization of supported Au25(glutathione)18 catalysts for benzyl alcohol oxidation

  • Zahraa Shahin,
  • Hyewon Ji,
  • Rodica Chiriac,
  • Nadine Essayem,
  • Franck Rataboul and
  • Aude Demessence

Beilstein J. Nanotechnol. 2019, 10, 228–237, doi:10.3762/bjnano.10.21

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  • spectrometer, with a deuterium discharge lamp as the radiation source for ultraviolet wavelength region and a tungsten lamp for the visible and short wave near-infrared wavelength region. Water was used as the blank. Synthesis of Au25(SG)18 Au25(SG)18 clusters were synthesized following a previously reported
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Published 18 Jan 2019

Surface plasmon resonance enhancement of photoluminescence intensity and bioimaging application of gold nanorod@CdSe/ZnS quantum dots

  • Siyi Hu,
  • Yu Ren,
  • Yue Wang,
  • Jinhua Li,
  • Junle Qu,
  • Liwei Liu,
  • Hanbin Ma and
  • Yuguo Tang

Beilstein J. Nanotechnol. 2019, 10, 22–31, doi:10.3762/bjnano.10.3

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  • Technology, Changchun 130022, P. R. China College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, P. R. China 10.3762/bjnano.10.3 Abstract Biological applications of core/shell near-infrared quantum dots (QDs) have attracted broad interest due to their unique optical and chemical
  • properties. Additionally, the use of multifunctional nanomaterials with near-infrared QDs and plasmonic functional nanoparticles are promising for applications in electronics, bioimaging, energy, and environmental-related studies. In this work, we experimentally demonstrate how to construct a multifunctional
  • can be easily tuned from the visible to the near-infrared (NIR) spectrum. QDs have emerged as the next generation of luminescence materials, and they have been widely used as nanoprobes for bioimaging and biosensing. As semiconductor nanocrystals, their large surface-to-volume ratio is advantageous
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Published 03 Jan 2019

A new bioinspired method for pressure and flow sensing based on the underwater air-retaining surface of the backswimmer Notonecta

  • Matthias Mail,
  • Adrian Klein,
  • Horst Bleckmann,
  • Anke Schmitz,
  • Torsten Scherer,
  • Peter T. Rühr,
  • Goran Lovric,
  • Robin Fröhlingsdorf,
  • Stanislav N. Gorb and
  • Wilhelm Barthlott

Beilstein J. Nanotechnol. 2018, 9, 3039–3047, doi:10.3762/bjnano.9.282

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  • individuals of Notonecta (mean body length 1.5 cm) were kept in small aquaria (4–5 individuals per tank). Tests were conducted in an experimental tank (19 × 7 cm2, water level 8 cm) and the animals were filmed (Sony DCR SR 55 with night shot function) under near infrared illumination (NIR, EcoLine IR
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Published 14 Dec 2018

Hybrid Au@alendronate nanoparticles as dual chemo-photothermal agent for combined cancer treatment

  • Anouchka Plan Sangnier,
  • Romain Aufaure,
  • Laurence Motte,
  • Claire Wilhelm,
  • Erwann Guenin and
  • Yoann Lalatonne

Beilstein J. Nanotechnol. 2018, 9, 2947–2952, doi:10.3762/bjnano.9.273

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  • , in the form of PTT, we first evaluated the specific photothermal properties of Au@alendronate NPs. In cancer therapy, it is desirable to use NPs that are active in the near-infrared (NIR) region to minimize light absorption of the laser radiation by surrounding tissues [27][34]. The plasmonic
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Published 27 Nov 2018

Near-infrared light harvesting of upconverting NaYF4:Yb3+/Er3+-based amorphous silicon solar cells investigated by an optical filter

  • Daiming Liu,
  • Qingkang Wang and
  • Qing Wang

Beilstein J. Nanotechnol. 2018, 9, 2788–2793, doi:10.3762/bjnano.9.260

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  • Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P.R. China Institute of NanoEngineering, School of Material Science and Engineering, Shandong university of Science and Technology, Qingdao, 266590, P.R. China 10.3762/bjnano.9.260 Abstract The wastage of near-infrared
  • XRD results revealed the morphology and a phase transition from cubic to hexagonal NaYF4. Photoluminescence spectra indicated that the hexagonal NaYF4:Yb3+/Er3+ nanorods convert near-infrared light of 980 nm to the visible light with wavelength peaks at 654, 541 and 522 nm. Hence, the upconverting
  • exhibited an 25% improved short-circuit current and an appreciable improvement of the near-infrared response of the external quantum efficiency. Moreover, because the size of the nanorods is comparable to the wavelength of visible light, the rods effectively scattered light, thus enhancing the visible light
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Published 31 Oct 2018

Magnetic and luminescent coordination networks based on imidazolium salts and lanthanides for sensitive ratiometric thermometry

  • Pierre Farger,
  • Cédric Leuvrey,
  • Mathieu Gallart,
  • Pierre Gilliot,
  • Guillaume Rogez,
  • João Rocha,
  • Duarte Ananias,
  • Pierre Rabu and
  • Emilie Delahaye

Beilstein J. Nanotechnol. 2018, 9, 2775–2787, doi:10.3762/bjnano.9.259

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  • since they cover a large range of emission from the ultraviolet (Gd3+) to near-infrared (Pr3+, Nd3+, Ho3+, Er3+, Yb3+) through the visible domain (Pr3+, Sm3+, Eu3+, Tb3+, Dy3+, Tm3+). It confers to lanthanide-based networks a large tunability of emission properties, which is very useful for the
  • ) coupled to a R928 or a H9170 Hamamatsu photomultiplier, for the detection on the visible and near-infrared spectral ranges, respectively, using the front-face acquisition mode. The excitation source was a 450 W Xe arc lamp. The emission spectra were corrected for detection and optical spectral response of
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Published 30 Oct 2018
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