Gold nanomakura: nanoarchitectonics and their photothermal response in association with carrageenan hydrogels

• Nabojit Das,
• Vikas,
• Akash Kumar,
• Sanjeev Soni and
• Raja Gopal Rayavarapu

Beilstein J. Nanotechnol. 2024, 15, 678–693, doi:10.3762/bjnano.15.56

• bromide (MTAB, C14) and dodecyltrimethylammonium bromide (DTAB, C12) with carbon tails containing 14 and 12 carbon atoms, respectively, other than hexadecyltrimethylammonium bromide (CTAB, C16), which has 16 carbon atoms in the carbon tail via seed-mediated growth method described elsewhere [24]. We

• aspect ratios of the nanoparticles. The synthesis of gold nanomakura particles via seed-mediated growth has been discussed elsewhere [12]. However, the effect of different carbon tail lengths on optical, structural, chemical properties, and photothermal response has been established in the present work

• (0.01 M) was added, which turned the solution brownish in colour. The appearance of a brownish colour confirmed the reduction of Au3+ to Au0. Step 2: Growth-mediated synthesis of gold nanomakura. In brief, a protocol that combines seed-mediated growth with controlled particle etching was used. The

Doxorubicin-loaded gold nanorods: a multifunctional chemo-photothermal nanoplatform for cancer management

• Uzma Azeem Awan,
• Abida Raza,
• Shaukat Ali,
• Rida Fatima Saeed and
• Nosheen Akhtar

Beilstein J. Nanotechnol. 2021, 12, 295–303, doi:10.3762/bjnano.12.24

• Synthesis of the DOX-loaded GNR nanocomplex In the present study, DOX-conjugated GNRs and hyperthermia were employed as a treatment strategy for HCC cells. First, GNRs were synthesized according to the well-known seed-mediated growth method [25] with a slight modification reported in our previous work [26

• ) and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) were purchased from Sigma-Aldrich. Deionized (DI) water, having a resistance of 18 MΩ·cm, was used throughout the experiments. Gold nanorod synthesis GNRs were synthesized through seed-mediated growth [25] with a slight

Straightforward synthesis of gold nanoparticles by adding water to an engineered small dendrimer

• Sébastien Gottis,
• Régis Laurent,
• Vincent Collière and
• Anne-Marie Caminade

Beilstein J. Nanotechnol. 2020, 11, 1110–1118, doi:10.3762/bjnano.11.95

• controlled two-step process named “seed-mediated growth”. The first step of this process is the generation of very small spherical nanoparticles that serve as seeds when the conditions are modified by adding more gold and another reductant [64]. For this work a single component was used to obtain the shape

Tailoring the magnetic properties of cobalt ferrite nanoparticles using the polyol process

• Malek Bibani,
• Romain Breitwieser,
• Alex Aubert,
• Vincent Loyau,
• Silvana Mercone,
• Souad Ammar and
• Fayna Mammeri

Beilstein J. Nanotechnol. 2019, 10, 1166–1176, doi:10.3762/bjnano.10.116

• stoichiometric NPs of different sizes, between 5 and 7 nm, in diethylene glycol, starting from iron and cobalt acetates, and using a seed-mediated growth approach [23]. They obtained monodisperse and stable particles, superparamagnetic at room temperature (RT), with, once again, high saturation magnetization

Polydopamine-coated Au nanorods for targeted fluorescent cell imaging and photothermal therapy

• Boris N. Khlebtsov,
• Andrey M. Burov,
• Timofey E. Pylaev and
• Nikolai G. Khlebtsov

Beilstein J. Nanotechnol. 2019, 10, 794–803, doi:10.3762/bjnano.10.79

• tetrachloroaurate trihydrate (HAuCl4·3H2O) and silver nitrate (AgNO3, >99%) were purchased from Alfa Aesar. Ultrapure water obtained from a Milli-Q Integral 5 system was used in all experiments. Synthesis of AuNRs AuNRs with a plasmon peak at around 800 nm were obtained by the seed-mediated growth method [41

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

• prepared by drop casting the sample dispersion onto an amorphous carbon-coated 300 mesh copper grid. Synthesis of GNRs To synthesize the GNRs, the seed-mediated growth method in CTAB solution was applied, as previously discussed [30][31]. The seed solution was prepared using 5 mL of a 0.2 M CTAB solution

Electrospun one-dimensional nanostructures: a new horizon for gas sensing materials

• Muhammad Imran,
• Nunzio Motta and
• Mahnaz Shafiei

Beilstein J. Nanotechnol. 2018, 9, 2128–2170, doi:10.3762/bjnano.9.202

• °C with response/recovery times of 75 s/12 s [223]. Importantly, the operating temperature of ZnO–SnO2 composite NTs decreases from 215 °C to 140 °C by decorating with Ag NPs using a seed-mediated growth method [158]. CuO/SnO2 mixed NFs synthesized by a double needle electrospinning technique have

Methods for preparing polymer-decorated single exchange-biased magnetic nanoparticles for application in flexible polymer-based films

• Laurence Ourry,
• Delphine Toulemon,
• Souad Ammar and
• Fayna Mammeri

Beilstein J. Nanotechnol. 2017, 8, 408–417, doi:10.3762/bjnano.8.43

• resulting nanohybrids can be considered as valuable building blocks for flexible, magnetic polymer-based devices. Keywords: assembly; ATRP; magnetic nanoparticle; exchange-bias; films; functionalization; polymerization; poly(methyl methacrylate); polystyrene; seed-mediated growth; surface; Introduction

• various material processing routes to prepare weakly interacting and densely arranged hybrid ENPs. The ENPs used were prepared by seed-mediated growth in a polyol medium; they consist of ferrimagnetic CoxFe3−xO4 single crystals, almost isotropic in shape and of about 10 nm in diameter, coated in a

Comparison of four methods for the biofunctionalization of gold nanorods by the introduction of sulfhydryl groups to antibodies

• Xuefeng Wang,
• Zhong Mei,
• Yanyan Wang and
• Liang Tang

Beilstein J. Nanotechnol. 2017, 8, 372–380, doi:10.3762/bjnano.8.39

• desalting columns (7K MWCO), and Ellman’s reagent were purchased from Thermo Scientific (Rockford, IL). PEG6-NHNH2 was obtained from SensoPath Technologies (Bozeman, MT). Glass slides (7 mm × 50 mm × 0.7 mm) were from Delta Technologies (Loveland, CO). GNR preparation GNRs were prepared by the seed-mediated

• growth method as previously described [29]. Briefly, a seed solution of gold nanospheres (5–10 nm) was obtained by mixing HAuCl4 (5 mL, 0.5 mM) with (5 mL, 0.2 M) CTAB for 1 min, followed by the addition of (0.6 mL, 10 mM) fresh, ice-cold sodium borohydride under vigorous stirring. The seed solution was

Direct formation of gold nanorods on surfaces using polymer-immobilised gold seeds

• Majid K. Abyaneh,
• Pietro Parisse and
• Loredana Casalis

Beilstein J. Nanotechnol. 2016, 7, 809–816, doi:10.3762/bjnano.7.72

• particles usually bond to the pre-functionalised surfaces using various chemical linkers [9][10]. The substrate is then immersed in a growth solution, which results in the growth of surface-bound seeds into 1D nanostructures, quite similar to seed-mediated growth in solution. Seed-mediated growth is one of

• of 0.2 M cetyltrimethylammonium bromide (CTAB), 250 μL of 0.01 M AuCl4−, 50 μL of 0.1 M ascorbic acid and 20 μL of 0.1 M HNO3 and kept undisturbed overnight at room temperature (ca. 24 °C). This step leads to the growth of protruded gold seeds into GNRs via seed-mediated growth. Atomic force

In vitro toxicity and bioimaging studies of gold nanorods formulations coated with biofunctional thiol-PEG molecules and Pluronic block copolymers

• Tianxun Gong,
• Douglas Goh,
• Malini Olivo and
• Ken-Tye Yong

Beilstein J. Nanotechnol. 2014, 5, 546–553, doi:10.3762/bjnano.5.64

• signals from Raman tags. Over the past few years, the seed-mediated growth method proposed by Murphy and El-Sayed’s group has been commonly used for synthesizing AuNRs formulations [6][12][13]. Cetyltrimethylammonium bromide (CTAB) molecules are used as structure directing agents to support the formation

Magnetic nanoparticles for biomedical NMR-based diagnostics

• Huilin Shao,
• Tae-Jong Yoon,
• Monty Liong,
• Ralph Weissleder and
• Hakho Lee

Beilstein J. Nanotechnol. 2010, 1, 142–154, doi:10.3762/bjnano.1.17

• iron(III) acetylacetonate [Fe(acac)3], manganese(II) acetylacetonate [Mn(acac)2] and 1,2-hexadecanediol at high temperature (300 °C). A seed-mediated growth approach was used to increase the size of the magnetic core from 10 nm to 12, 16, or 22 nm. MnFe2O4 nanoparticles with a diameter ≤16 nm were