Cyclodextrins as eminent constituents in nanoarchitectonics for drug delivery systems

• Makoto Komiyama

Beilstein J. Nanotechnol. 2023, 14, 218–232, doi:10.3762/bjnano.14.21

• therapy (PDT) employs a light-sensitive medicine (photosensitizer) and a light source to destroy abnormal cells [72][73]. The photosensitizer absorbs the light and is activated to kill target tissue. In many cases, reactive oxygen species (ROSs) such as singlet oxygen (1O2) generated from 3O2 by a

• accomplish PDT using NIR light irradiation, adamantane-modified phthalocyanine was connected to upconversion nanoparticles using carboxymethyl-β-CyD [76]. Furthermore, boron-dipyrromethene (BODIPY) photosensitizer was complexed with amphiphilic α-CyD bearing oligo(ethylene glycol) chains [77]. By

• encapsulating (a part of) the photosensitizer in the cavities, its self-aggregation was suppressed to accomplish a high quantum yield of 1O2 production. The aggregation of porphyrin was photocontrolled by using complex formation of β-CyD with photoresponsive azobenzene [78]. By delivering nitrogen oxide (NO

Recent advances in green carbon dots (2015–2022): synthesis, metal ion sensing, and biological applications

• Aisha Kanwal,
• Naheed Bibi,
• Sajjad Hyder,
• Arif Muhammad,
• Hao Ren,
• Jiangtao Liu and
• Zhongli Lei

Beilstein J. Nanotechnol. 2022, 13, 1068–1107, doi:10.3762/bjnano.13.93

Engineered titania nanomaterials in advanced clinical applications

• Padmavati Sahare,
• Paulina Govea Alvarez,
• Juan Manual Sanchez Yanez,
• Gabriel Luna-Bárcenas,
• Samik Chakraborty,
• Sujay Paul and
• Miriam Estevez

Beilstein J. Nanotechnol. 2022, 13, 201–218, doi:10.3762/bjnano.13.15

• become superhydrophilic under UV light, function well as photosensitizer. Subsequently, another study established the use of nanoscale TiO2 as a redox coating of in implants [9]. Titanium and its alloys are considered the most promising materials for implants due to their superior properties, which

• cells containing TiO2 nps undergo oxidative degeneration upon light irradiation under the influence of generated ROS and, therefore, these nps are considered as a potent photosensitizer in anticancer photodynamic therapy and the photodynamic inactivation of antibiotic-resistant bacteria [15]. TiO2

• drawback of using TiO2 as photosensitizer is the shallow penetration depth in tissues as it gets activated only by UV light; however, for deep penetration of light into tissues, the wavelength should be in the near-infrared (NIR) window (700–1100 nm) [111]. TiO2 nps can be retained in the body for more

Self-assembly of amino acids toward functional biomaterials

• Huan Ren,
• Lifang Wu,
• Lina Tan,
• Yanni Bao,
• Yuchen Ma,
• Yong Jin and
• Qianli Zou

Beilstein J. Nanotechnol. 2021, 12, 1140–1150, doi:10.3762/bjnano.12.85

• acid and functional molecule self-assembly (drug, photosensitizer) (Figure 1). In this paper, the self-assembly of single amino acids is discussed first. We then discuss the co-assembly of amino acids and their derivatives with functional components including metal ions, photosensitizers (PS), and

• PS to tumor tissues [76]. Liu et al. [78] designed photosensitizer delivery systems by self-assembling cationic diphenylalanine (H-Phe-Phe-NH2 HCl, CDP) or 9-fluorenylmethoxycarbonyl-ʟ-lysine (Fmoc-ʟ-Lys) with Ce6 into nanoparticles (CCNPs and FCNPs, respectively). Intermolecular hydrophobic and π–π

• ) melanin through a Schiff base reaction to form an adhesive layer, and Fmoc-ʟ-Lys/DOPA fiber simulated an antenna to capture light. As a photosensitizer, Sn(IV)tetrakis(4-pyridyl)porphyrin (SnTPyP) was combined with the photocatalyst Co3O4 NPs by coordination bonds and electrostatic interaction onto the

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

• dual-mode fluorescence and magnetic resonance imaging. Using magnetic targeting, the micro/nanorobot broke through complex physiological barriers and entered tumors while carrying a photosensitizer. After that, local high temperature was generated by a near-infrared laser, and observable and accurate

Photothermally active nanoparticles as a promising tool for eliminating bacteria and biofilms

• Mykola Borzenkov,
• Piersandro Pallavicini,
• Angelo Taglietti,
• Laura D’Alfonso,
• Maddalena Collini and
• Giuseppe Chirico

Beilstein J. Nanotechnol. 2020, 11, 1134–1146, doi:10.3762/bjnano.11.98

• of a NaYF4:Mn/Yb/Er@photosensitizer doped with SiO2 This allowed for the integration of photodynamic and photothermic therapy to improve the treatment against multidrug-resistant bacteria [82]. It was demonstrated that such nanodevices exhibited superior antibacterial activity towards drug-resistant

A few-layer graphene/chlorin e6 hybrid nanomaterial and its application in photodynamic therapy against Candida albicans

• Selene Acosta,
• Carlos Moreno-Aguilar,
• Dania Hernández-Sánchez,
• Beatriz Morales-Cruzado,
• Erick Sarmiento-Gomez,
• Carla Bittencourt,
• Luis Octavio Sánchez-Vargas and
• Mildred Quintana

Beilstein J. Nanotechnol. 2020, 11, 1054–1061, doi:10.3762/bjnano.11.90

• ; few-layer graphene (FLG); hybrid nanomaterial; photodynamic therapy (PDT); photosensitizer; Introduction The frequency of fungal infections has notably increased in the last decades; for instance, Candida albicans is now reported as the fourth cause of nosocomial septicemia in the United States [1

• Paramecia [5]. PDT consists of the interaction of visible-light photons with a photosensitizer located inside the cell or in close proximity to it. In this interaction, the photosensitizer produces highly reactive oxygen species (ROS) by reacting in the excited state with molecular oxygen present in the

• environment. ROS refer to molecules like singlet oxygen, superoxide anion, and radicals, which are responsible for producing oxidative stress in cells followed by cell death [4]. Photosensitizer molecules must be nontoxic before irradiated with light, must produce high amounts of ROS when irradiated with

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

• therapy is a technique already used in ophthalmology or oncology. It is based on the local production of reactive oxygen species through an energy transfer from an excited photosensitizer to oxygen present in the biological tissue. This review first presents an update, mainly covering the last five years

• , regarding the block copolymers used as nanovectors for the delivery of the photosensitizer. In particular, we describe the chemical nature and structure of the block copolymers showing a very large range of existing systems, spanning from natural polymers such as proteins or polysaccharides to synthetic

• photosensitizer formulation, light dosimetry, to planning and monitoring the treatment [15][18][19][20][21][22]. Some of these points have been recently reviewed: ideal photosensitizers [23], challenges in formulating photosensitizers, and choosing the right light dosimetry [24], as well as monitoring the

Air oxidation of sulfur mustard gas simulants using a pyrene-based metal–organic framework photocatalyst

• Ghada Ayoub,
• Mihails Arhangelskis,
• Xuan Zhang,
• Florencia Son,
• Timur Islamoglu,
• Tomislav Friščić and
• Omar K. Farha

Beilstein J. Nanotechnol. 2019, 10, 2422–2427, doi:10.3762/bjnano.10.232

• photosensitizer for generating singlet oxygen and subsequent oxidative degradation of chemical warfare agents (CWAs). The high activity of NU-400 permits photocatalytic conversion of the 2-chloroethyl ethyl sulfide (CEES) mustard gas simulant into a benign sulfoxide derivative, in air, with less than 15 minutes

• nerve gas agents [37][38][39][40][41][42]. Here, we describe the preparation of NU-400 [43], a zirconium-based MOF based on a judiciously chosen pyrene-based linker and utilized it as a photosensitizer for the efficient production of 1O2 and hence photocatalytic conversion of the sulfur mustard simulant

• 2-chloroethyl ethyl sulfide (CEES) into a benign sulfoxide product, using ambient air as the oxygen source. We selected a Zr6-based MOF because of its outstanding stability under a wide range of thermal and chemical conditions. As pyrene has been known as an efficient photosensitizer that is capable

Photoactive nanoarchitectures based on clays incorporating TiO₂ and ZnO nanoparticles

• Eduardo Ruiz-Hitzky,
• Pilar Aranda,
• Marwa Akkari,
• Nithima Khaorapapong and
• Makoto Ogawa

Beilstein J. Nanotechnol. 2019, 10, 1140–1156, doi:10.3762/bjnano.10.114

• transformation and for improved overall reaction efficiency. This article tries also to present new steps towards more sophisticated but efficient and highly selective functional nanoarchitectures incorporating photosensitizer elements for tuning the semiconductor–clay photoactivity. Keywords: clays

• represents an additional improvement of the photoactivity tuning of semiconductor–clay nanoarchitectures. For instance, tris(2,2′-bipyridine)ruthenium(II) has been used as photosensitizer for titania, being further applied to TiO2@clay nanoarchitectures. In this way, a synthetic saponite containing tris(2,2

• ′-bipyridine)ruthenium(II) intercalated in the interlayer space was complexed with TiO2 NPs [166]. The resulting material shows enhanced stability toward visible-light irradiation, if compared with the TiO2 (P25) standard material photosensitized by an analogous commercially available photosensitizer (tris(2,2

The nanoscaled metal-organic framework ICR-2 as a carrier of porphyrins for photodynamic therapy

• Jan Hynek,
• Sebastian Jurík,
• Martina Koncošová,
• Jaroslav Zelenka,
• Ivana Křížová,
• Tomáš Ruml,
• Kaplan Kirakci,
• Ivo Jakubec,
• František Kovanda,
• Kamil Lang and
• Jan Demel

Beilstein J. Nanotechnol. 2018, 9, 2960–2967, doi:10.3762/bjnano.9.275

• ) to and the excited O2(1∆g) from the solid photosensitizer [14][15][16]. In our recent work we have shown that microcrystalline porphyrin containing MOFs are poor O2(1∆g) photosensitizers [17], due to the combined effect of the quenching of excited states in tightly stacked porphyrin units and strong

• photosensitizer loading of the nanoparticles. The porphyrins retain part of their photophysical properties including production of singlet oxygen. Interestingly, the photodynamic activity on HeLa cells strongly depends on the R substituent at the P atom, i.e., only the phenyl substituent (TPPPi(Ph)) ensured high

Droplet-based synthesis of homogeneous magnetic iron oxide nanoparticles

• Christian D. Ahrberg,
• Ji Wook Choi and
• Bong Geun Chung

Beilstein J. Nanotechnol. 2018, 9, 2413–2420, doi:10.3762/bjnano.9.226

• healthcare significantly [5]. For example, a composite nanomaterial has been developed as a photosensitizer in photothermal therapy (PTT), while also acting as a contrast agent for magnetic resonance imaging (MRI) [6]. Magnetic materials are of particular interest here, as they can be used for targeting [7

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

• the later prevents the former from photocorroding [197]. In addition, CdS acts as a photosensitizer to absorb visible radiation and transfers eCB− to the CB of TiO2 by retaining hVB+ at its VB. As a result, the recombination of photoinduced species is appreciably inhibited [70]. Therefore, it is often

Sugarcane juice derived carbon dot–graphitic carbon nitride composites for bisphenol A degradation under sunlight irradiation

• Lan Ching Sim,
• Jing Lin Wong,
• Chen Hong Hak,
• Jun Yan Tai,
• Kah Hon Leong and
• Pichiah Saravanan

Beilstein J. Nanotechnol. 2018, 9, 353–363, doi:10.3762/bjnano.9.35

• diffuse reflectance spectra (UV–vis DRS) results. Although the CDs did not display upconversion photoluminescence (UCPL) properties, the π-conjugated CDs served as a photosensitizer (like organic dyes) to sensitize g-C3N4 and injected electrons to the conduction band (CB) of g-C3N4, resulting in the

• was attributed to the dual functionality of CDs as electron trapper and photosensitizer. Although some works have been carried out in this field, several insights have yet to be explored to fill the gaps of previous works, including (i) the utilization of harmless solar energy as a resource to

• irradiate photocatalytic degradation of organic pollutant (since CDs could act as a photosensitizer over the entire solar spectrum) and (ii) acknowledgement that the most reported bioprecursor-derived CDs and g-C3N4 composite are limited to the photocatalytic generation of H2 (instead limited attempts have

Application of visible-light photosensitization to form alkyl-radical-derived thin films on gold

• Rashanique D. Quarels,
• Xianglin Zhai,
• Neepa Kuruppu,
• Jenny K. Hedlund,
• Ashley A. Ellsworth,
• Amy V. Walker,
• Jayne C. Garno and
• Justin R. Ragains

Beilstein J. Nanotechnol. 2017, 8, 1863–1877, doi:10.3762/bjnano.8.187

• Dallas, 800 W. Campbell Rd., Richardson, TX, 75080, USA Department of Materials Science, University of Texas at Dallas, 800 W. Campbell Rd., Richardson, TX, 75080, USA 10.3762/bjnano.8.187 Abstract Visible-light irradiation of phthalimide esters in the presence of the photosensitizer [Ru(bpy)3]2+ and

• ), species that are synthesized in one step from carboxylic acids [33][34][35][36][37][38][39][40] and which have been used to address a number of difficult problems in organic synthesis [36][37][38][39][40]. Therefore (Scheme 1), visible-light irradiation (e.g., with blue LEDs) of the photosensitizer [Ru

• turns over the photosensitizer (Equation 2) [39]. The fate of 7 is protonation, possibly by BNAH∙+ (4), to generate phthalimide [39]. Alkyl radical R∙ would then be subject to processes including reduction to alkane RH with generation of benzyl nicotinamide radical (BNA∙, 8, Equation 3) or fully

Three-in-one approach towards efficient organic dye-sensitized solar cells: aggregation suppression, panchromatic absorption and resonance energy transfer

• Jayita Patwari,
• Samim Sardar,
• Bo Liu,
• Peter Lemmens and
• Samir Kumar Pal

Beilstein J. Nanotechnol. 2017, 8, 1705–1713, doi:10.3762/bjnano.8.171

• being used to sensitize the photoanodes [13]. Organic dyes are attractive as a photosensitizer because of their high molar extinction coefficient, tunable absorption wavelength, and easy design and synthesis strategies. Still, the efficiency of organic dye-sensitized solar cells is not comparable to

Two-dimensional carbon-based nanocomposites for photocatalytic energy generation and environmental remediation applications

• Suneel Kumar,
• Ashish Kumar,
• Ashish Bahuguna,
• Vipul Sharma and
• Venkata Krishnan

Beilstein J. Nanotechnol. 2017, 8, 1571–1600, doi:10.3762/bjnano.8.159

• nanocomposites. Then, the development of various graphene-based nanocomposites for the above-mentioned applications is presented, wherein graphene plays different roles, including electron acceptor/transporter, cocatalyst, photocatalyst and photosensitizer. Subsequently, the development of different graphitic

• water splitting reaction, the graphene in the nanocomposite plays different roles, such as photocatalyst, cocatalyst, electron acceptor/transporter and photosensitizer. These roles are described in detail in the following sections. Graphene as a photocatalyst A photocatalyst is a substance which

• graphene sheets, wherein H2 is produced from H+ ions. Graphene as a photosensitizer Apart from the photocatalytic and cocatalytic role of graphene, it is worth to discuss the photosensitizer role played by graphene in many nanocomposite materials. A photosensitizer is a light-absorbing substance which

Nano-engineered skin mesenchymal stem cells: potential vehicles for tumour-targeted quantum-dot delivery

• Liga Saulite,
• Dominyka Dapkute,
• Karlis Pleiko,
• Ineta Popena,
• Simona Steponkiene,
• Ricardas Rotomskis and
• Una Riekstina

Beilstein J. Nanotechnol. 2017, 8, 1218–1230, doi:10.3762/bjnano.8.123

• NPs and act synergistically [13][14]. QDs were also chosen for their applicability as resonant energy donors in photodynamic therapy. For example, the second-generation photosensitizer chlorin e6 has the absorption band at 654 nm and carboxyl QD655 would be excellent energy donors in such complexes

ZnO nanoparticles sensitized by CuInZn_xS_2+x quantum dots as highly efficient solar light driven photocatalysts

• Florian Donat,
• Serge Corbel,
• Halima Alem,
• Steve Pontvianne,
• Lavinia Balan,
• Ghouti Medjahdi and
• Raphaël Schneider

Beilstein J. Nanotechnol. 2017, 8, 1080–1093, doi:10.3762/bjnano.8.110

• both under solar and visible light illumination (light intensity = 5 mW/cm2) of all the ZnO/ZCIS composites prepared, we selected Orange II dye as a model contaminant because this dye is not a photosensitizer (in contrast to Methylene Blue or Rhodamine which promote photocatalytic degradation). Prior

• photosensitizer (Ф1O2 (RB) = 75% in water) [58]. The plots ln(PL525) of SOSG-EP vs time for RB and for the ZnO/ZCIS composite show a good linear fit during the first 3.5 min of irradiation (Figure 10b). The Ф1O2 of the ZnO/ZCIS catalyst was estimated using the equation: Ф1O2 (ZnO/ZCIS) = Ф1O2 (RB) × (kZnO/ZCIS

Performance of natural-dye-sensitized solar cells by ZnO nanorod and nanowall enhanced photoelectrodes

• Saif Saadaoui,
• Mohamed Aziz Ben Youssef,
• Moufida Ben Karoui,
• Rached Gharbi,
• Emanuele Smecca,
• Vincenzina Strano,
• Salvo Mirabella,
• Alessandra Alberti and
• Rosaria A. Puglisi

Beilstein J. Nanotechnol. 2017, 8, 287–295, doi:10.3762/bjnano.8.31

• to the nature of the photosensitizer used in the present investigation. Furthermore, the small thickness of the ZnO NRs and NWs can be a major reason for this degradation in the efficiency. However, the chemical reaction of the ZnO nanostructures when immersed in dye solution was carried out at the

Performance of colloidal CdS sensitized solar cells with ZnO nanorods/nanoparticles

• Anurag Roy,
• Partha Pratim Das,
• Mukta Tathavadekar,
• Sumita Das and
• Parukuttyamma Sujatha Devi

Beilstein J. Nanotechnol. 2017, 8, 210–221, doi:10.3762/bjnano.8.23

• Division, CSIR-National Chemical Laboratory, Pune 411 008, India 10.3762/bjnano.8.23 Abstract As an alternative photosensitizer in dye-sensitized solar cells, bovine serum albumin (BSA) (a nonhazardous protein) was used in the synthesis of colloidal CdS nanoparticles (NPs). This system has been employed

• , we have reported the advantages of using 1D ZnO nanorods compared to nanoparticles in DSSCs using N719 as a photosensitizer [31]. Due to the reduced grain boundaries and direct conjunction pathway, 1D nanorods can diffuse electrons faster than nanoparticles and other morphologies. However

The influence of phthalocyanine aggregation in complexes with CdSe/ZnS quantum dots on the photophysical properties of the complexes

• Irina V. Martynenko,
• Anna O. Orlova,
• Vladimir G. Maslov,
• Anatoly V. Fedorov,
• Kevin Berwick and
• Alexander V. Baranov

Beilstein J. Nanotechnol. 2016, 7, 1018–1027, doi:10.3762/bjnano.7.94

• ; Förster resonance energy transfer; photosensitizer; semiconductor nanocrystals; tetrapyrroles; Introduction Semiconductor quantum dots (QDs) and their complexes with organic molecules have been a subject of extensive research during the last couple of decades. In particular, complexes of QDs and

• . Experimental Materials The photosensitizer Photosens® was obtained from NIOPIK (Russia). At present, the Photosens® is used clinically for PDT [42]. Photosens® is a mixture of sulfonated hydroxyaluminium phthalocyanines (PcSz) with different numbers of sulfo groups per molecule, with z = 2, 3 or 4. So, in an

Hierarchical coassembly of DNA–triptycene hybrid molecular building blocks and zinc protoporphyrin IX

• Rina Kumari,
• Sumit Singh,
• Mohan Monisha,
• Sourav Bhowmick,
• Anindya Roy,
• Neeladri Das and
• Prolay Das

Beilstein J. Nanotechnol. 2016, 7, 697–707, doi:10.3762/bjnano.7.62

• desorption/ionization time-of-flight (MALDI-TOF). The biologically relevant photosensitizer Zn PpIX was used to direct the hybridization-mediated self-assembly of DNA–TPA molecular building blocks as well as a model guest molecule within the DNA–TPA supramolecular self-assembly. The formation of fiber-like

Silica-coated upconversion lanthanide nanoparticles: The effect of crystal design on morphology, structure and optical properties

• Uliana Kostiv,
• Miroslav Šlouf,
• Hana Macková,
• Alexander Zhigunov,
• Hana Engstová,
• Katarína Smolková,
• Petr Ježek and
• Daniel Horák

Beilstein J. Nanotechnol. 2015, 6, 2290–2299, doi:10.3762/bjnano.6.235

• photosensitizer [43]. Upconversion OM–NaYF4:Yb3+/Er3+ nanoparticles were excited by near-infrared light at 980 nm, i.e., at the Yb3+ absorption maximum. Photons were emitted at 520, 545 and 660 nm in the fluorescence spectra of the OM–NaYF4:Yb3+/Er3+ nanoparticles. The NaYF4:Yb3+/Er3+ nanoparticles were

Novel ZnO:Ag nanocomposites induce significant oxidative stress in human fibroblast malignant melanoma (Ht144) cells

• Syeda Arooj,
• Samina Nazir,
• Akhtar Nadhman,
• Nafees Ahmad,
• Bakhtiar Muhammad,
• Ishaq Ahmad,
• Kehkashan Mazhar and
• Rashda Abbasi

Beilstein J. Nanotechnol. 2015, 6, 570–582, doi:10.3762/bjnano.6.59

• thus exciting the photosensitizer to produce reactive oxygen species (ROS) such as singlet oxygen (1O2) and hydroxyl radicals (HO•) [6][7]. Photo-oxidation holds promises for the targeted treatment and controlled elimination of cancer cells [8]. ZnO NPs have also shown photo-oxidative anticancer