Beilstein Journal of Nanotechnology最新文献_第10页

Elasticity, an often-overseen parameter in the development of nanoscale drug delivery systems. 弹性，一个经常被忽视的参数在纳米级药物输送系统的发展。

IF 3.1 4区材料科学

Beilstein Journal of Nanotechnology Pub Date : 2023-11-23 eCollection Date: 2023-01-01 DOI: 10.3762/bjnano.14.95

Agnes-Valencia Weiss, Marc Schneider

引用次数: 0

A multi-resistance wide-range calibration sample for conductive probe atomic force microscopy measurements. 用于导电探针原子力显微镜测量的多电阻宽范围校准样品。

IF 3.1 4区材料科学

Beilstein Journal of Nanotechnology Pub Date : 2023-11-22 eCollection Date: 2023-01-01 DOI: 10.3762/bjnano.14.94

François Piquemal, Khaled Kaja, Pascal Chrétien, José Morán-Meza, Frédéric Houzé, Christian Ulysse, Abdelmounaim Harouri

{"title":"A multi-resistance wide-range calibration sample for conductive probe atomic force microscopy measurements.","authors":"François Piquemal, Khaled Kaja, Pascal Chrétien, José Morán-Meza, Frédéric Houzé, Christian Ulysse, Abdelmounaim Harouri","doi":"10.3762/bjnano.14.94","DOIUrl":"10.3762/bjnano.14.94","url":null,"abstract":"Measuring resistances at the nanoscale has attracted recent attention for developing microelectronic components, memory devices, molecular electronics, and two-dimensional materials. Despite the decisive contribution of scanning probe microscopy in imaging resistance and current variations, measurements have remained restricted to qualitative comparisons. Reference resistance calibration samples are key to advancing the research-to-manufacturing process of nanoscale devices and materials through calibrated, reliable, and comparable measurements. No such calibration reference samples have been proposed so far. In this work, we demonstrate the development of a multi-resistance reference sample for calibrating resistance measurements in conductive probe atomic force microscopy (C-AFM) covering the range from 100 Ω to 100 GΩ. We present a comprehensive protocol for in situ calibration of the whole measurement circuit encompassing the tip, the current sensing device, and the system controller. Furthermore, we show that our developed resistance reference enables the calibration of C-AFM with a combined relative uncertainty (given at one standard deviation) lower than 2.5% over an extended range from 10 kΩ to 100 GΩ and lower than 1% for a reduced range from 1 MΩ to 50 GΩ. Our findings break through the long-standing bottleneck in C-AFM measurements, providing a universal means for adopting calibrated resistance measurements at the nanoscale in the industrial and academic research and development sectors.","PeriodicalId":8802,"journal":{"name":"Beilstein Journal of Nanotechnology","volume":"14 ","pages":"1141-1148"},"PeriodicalIF":3.1,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10682512/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138457590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Curcumin-loaded albumin submicron particles with potential as a cancer therapy: an in vitro study. 含有姜黄素的白蛋白亚微米颗粒具有潜在的癌症治疗作用:一项体外研究。

IF 3.1 4区材料科学

Beilstein Journal of Nanotechnology Pub Date : 2023-11-21 eCollection Date: 2023-01-01 DOI: 10.3762/bjnano.14.93

Nittiya Suwannasom, Netsai Sriaksorn, Chutamas Thepmalee, Krissana Khoothiam, Ausanai Prapan, Hans Bäumler, Chonthida Thephinlap

{"title":"Curcumin-loaded albumin submicron particles with potential as a cancer therapy: an in vitro study.","authors":"Nittiya Suwannasom, Netsai Sriaksorn, Chutamas Thepmalee, Krissana Khoothiam, Ausanai Prapan, Hans Bäumler, Chonthida Thephinlap","doi":"10.3762/bjnano.14.93","DOIUrl":"10.3762/bjnano.14.93","url":null,"abstract":"Curcumin (CUR), a polyphenolic compound, shows promising biological properties, particularly antioxidant activity. However, its medical applications are limited due to its low water solubility, bioavailability, and pH-instability. CUR-loaded albumin microparticles (CUR-HSA-MPs) of submicron size in the range of 800 to 900 nm and a zeta potential of -15 mV were prepared. The CUR loading efficiency was up to 65%. A maximum release of 37% of the encapsulated CUR was observed within 6 h when the CUR-HSA-MPs were dispersed in 50% ethanol in PBS at pH 7, while in RPMI 1640 medium the release was 7%. This demonstrates a sustainable release. The in vitro cytotoxicity of CUR-HSA-MPs showed promising anticancer potential against human hepatocellular carcinoma (Huh-7) and human breast adenocarcinoma (MCF-7) cell lines, although this effect was less pronounced in human dermal fibroblasts (HDFB) and human cholangiocyte (MMN) cell lines. Confocal microscopy was used to confirm the uptake of CUR-HSA-MPs by cancer cells. Our studies revealed that HSA-MPs are potentially promising vehicles for increasing the solubility and bioavailability of CUR.","PeriodicalId":8802,"journal":{"name":"Beilstein Journal of Nanotechnology","volume":"14 ","pages":"1127-1140"},"PeriodicalIF":3.1,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10682534/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138457591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A bifunctional superconducting cell as flux qubit and neuron. 作为通量量子比特和神经元的双功能超导细胞。

IF 3.1 4区材料科学

Beilstein Journal of Nanotechnology Pub Date : 2023-11-21 eCollection Date: 2023-01-01 DOI: 10.3762/bjnano.14.92

Dmitrii S Pashin, Pavel V Pikunov, Marina V Bastrakova, Andrey E Schegolev, Nikolay V Klenov, Igor I Soloviev

引用次数: 0

Sulfur nanocomposites with insecticidal effect for the control of Bactericera cockerelli. 具有杀虫效果的硫纳米复合材料对可氏杆菌的防治作用。

IF 3.1 4区材料科学

Beilstein Journal of Nanotechnology Pub Date : 2023-11-17 eCollection Date: 2023-01-01 DOI: 10.3762/bjnano.14.91

Lany S Araujo-Yépez, Juan O Tigrero-Salas, Vicente A Delgado-Rodríguez, Vladimir A Aguirre-Yela, Josué N Villota-Méndez

{"title":"Sulfur nanocomposites with insecticidal effect for the control of Bactericera cockerelli.","authors":"Lany S Araujo-Yépez, Juan O Tigrero-Salas, Vicente A Delgado-Rodríguez, Vladimir A Aguirre-Yela, Josué N Villota-Méndez","doi":"10.3762/bjnano.14.91","DOIUrl":"https://doi.org/10.3762/bjnano.14.91","url":null,"abstract":"The purpose of this research was to synthesize nanocomposites consisting of sulfur nanoparticles coated with eucalyptus and rosemary essential oils to determine the insecticidal effect in the control of nymphs of paratrioza (Bactericera cockerelli (Sulc) (Hemiptera: Triozidae)) in potato crops. A solution of thiosulfate was reduced to elemental sulfur, and the sulfur nanoparticles were coated with eucalyptus and rosemary essential oils with the three concentrations of 0.25%, 0.5%, and 0.75%. The samples were characterized by UV-visible spectroscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, and scanning electron microscopy. The insecticidal efficacy of the nanocomposites was evaluated in the entomology laboratory 24, 48, and 72 h after application. Furthermore, efficacy was compared to the commercial insecticide thiamethoxam (0.25%) and a control. The results show that eucalyptus nanocomposites with oil concentrations of 0.25%, 0.5%, and 0.75% and rosemary nanocomposites with an oil concentration of 0.5% have an insecticidal efficacy of 100% for the control of insect nymphs 24 h after application. The insecticidal efficacy of rosemary nanocomposites with oil concentrations of 0.25% and 0.75% increases over time and reaches 100% at 24 and 72 h, respectively. The synthesized nanocomposites are more effective in controlling nymphs of paratrioza than the commercial insecticide thiamethoxam; thus, they could be used for the development of new insecticides.","PeriodicalId":8802,"journal":{"name":"Beilstein Journal of Nanotechnology","volume":"14 ","pages":"1106-1115"},"PeriodicalIF":3.1,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10667717/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138457594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Density functional theory study of Au-fcc/Ge and Au-hcp/Ge interfaces. Au-fcc/Ge和Au-hcp/Ge界面的密度泛函理论研究。

IF 3.1 4区材料科学

Beilstein Journal of Nanotechnology Pub Date : 2023-11-15 eCollection Date: 2023-01-01 DOI: 10.3762/bjnano.14.90

Olga Sikora, Małgorzata Sternik, Benedykt R Jany, Franciszek Krok, Przemysław Piekarz, Andrzej M Oleś

{"title":"Density functional theory study of Au-fcc/Ge and Au-hcp/Ge interfaces.","authors":"Olga Sikora, Małgorzata Sternik, Benedykt R Jany, Franciszek Krok, Przemysław Piekarz, Andrzej M Oleś","doi":"10.3762/bjnano.14.90","DOIUrl":"https://doi.org/10.3762/bjnano.14.90","url":null,"abstract":"In recent years, nanostructures with hexagonal polytypes of gold have been synthesised, opening new possibilities in nanoscience and nanotechnology. As bulk gold crystallizes in the fcc phase, surface effects can play an important role in stabilizing hexagonal gold nanostructures. Here, we investigate several heterostructures with Ge substrates, including the fcc and hcp phases of gold that have been observed experimentally. We determine and discuss their interfacial energies and optimized atomic arrangements, comparing the theory results with available experimental data. Our DFT calculations for the Au-fcc(011)/Ge(001) junction show how the presence of defects in the interface layer can help to stabilize the atomic pattern, consistent with microscopic images. Although the Au-hcp/Ge interface is characterized by a similar interface energy, it reveals large atomic displacements due to significant mismatch. Finally, analyzing the electronic properties, we demonstrate that Au/Ge systems have metallic character, but covalent-like bonding states between interfacial Ge and Au atoms are also present.","PeriodicalId":8802,"journal":{"name":"Beilstein Journal of Nanotechnology","volume":"14 ","pages":"1093-1105"},"PeriodicalIF":3.1,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10679839/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138457592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Properties of tin oxide films grown by atomic layer deposition from tin tetraiodide and ozone 四碘化锡与臭氧原子层沉积法生长氧化锡薄膜的性质

4区材料科学

Beilstein Journal of Nanotechnology Pub Date : 2023-11-13 DOI: 10.3762/bjnano.14.89

Kristjan Kalam, Peeter Ritslaid, Tanel Käämbre, Aile Tamm, Kaupo Kukli

引用次数: 0

Dual-heterodyne Kelvin probe force microscopy 双外差开尔文探针力显微镜

4区材料科学

Beilstein Journal of Nanotechnology Pub Date : 2023-11-07 DOI: 10.3762/bjnano.14.88

Benjamin Grévin, Fatima Husainy, Dmitry Aldakov, Cyril Aumaître

{"title":"Dual-heterodyne Kelvin probe force microscopy","authors":"Benjamin Grévin, Fatima Husainy, Dmitry Aldakov, Cyril Aumaître","doi":"10.3762/bjnano.14.88","DOIUrl":"https://doi.org/10.3762/bjnano.14.88","url":null,"abstract":"We present a new open-loop implementation of Kelvin probe force microscopy (KPFM) that provides access to the Fourier spectrum of the time-periodic surface electrostatic potential generated under optical (or electrical) pumping with an atomic force microscope. The modulus and phase coefficients are probed by exploiting a double heterodyne frequency mixing effect between the mechanical oscillation of the cantilever, modulated components of the time-periodic electrostatic potential at harmonic frequencies of the pump, and an ac bias modulation signal. Each harmonic can be selectively transferred to the second cantilever eigenmode. We show how phase coherent sideband generation and signal demodulation at the second eigenmode can be achieved by using two numerical lock-in amplifiers configured in cascade. Dual-heterodyne KPFM (DHe-KPFM) can be used to map any harmonic (amplitude/phase) of the time-periodic surface potential at a standard scanning speed. The Fourier spectrum (series of harmonics) can also be recorded in spectroscopic mode (DHe-KPFM spectroscopy), and 2D dynamic images can be acquired in data cube mode. The capabilities of DHe-KPFM in terms of time-resolved measurements, surface photovoltage (SPV) imaging, and detection of weak SPV signals are demonstrated through a series of experiments on difference surfaces: a reference substrate, a bulk organic photovoltaic heterojunction thin film, and an optoelectronic interface obtained by depositing caesium lead bromide perovskite nanosheets on a graphite surface. The conclusion provides perspectives for future improvements and applications.","PeriodicalId":8802,"journal":{"name":"Beilstein Journal of Nanotechnology","volume":"212 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135475955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spatial mapping of photovoltage and light-induced displacement of on-chip coupled piezo/photodiodes by Kelvin probe force microscopy under modulated illumination 用开尔文探针力显微镜观察片上耦合压电/光电二极管在调制照明下的光电压和光致位移的空间映射

4区材料科学

Beilstein Journal of Nanotechnology Pub Date : 2023-11-06 DOI: 10.3762/bjnano.14.87

Zeinab Eftekhari, Nasim Rezaei, Hidde Stokkel, Jian-Yao Zheng, Andrea Cerreta, Ilka Hermes, Minh Nguyen, Guus Rijnders, Rebecca Saive

引用次数: 0

Experimental investigation of usage of POE lubricants with Al₂O₃, graphene or CNT nanoparticles in a refrigeration compressor. 在制冷压缩机中使用具有Al2O3、石墨烯或CNT纳米颗粒的POE润滑剂的实验研究。

IF 3.1 4区材料科学

Beilstein Journal of Nanotechnology Pub Date : 2023-11-02 eCollection Date: 2023-01-01 DOI: 10.3762/bjnano.14.86

Kayhan Dağıdır, Kemal Bilen

{"title":"Experimental investigation of usage of POE lubricants with Al2O3, graphene or CNT nanoparticles in a refrigeration compressor.","authors":"Kayhan Dağıdır, Kemal Bilen","doi":"10.3762/bjnano.14.86","DOIUrl":"10.3762/bjnano.14.86","url":null,"abstract":"In this study, the use of nanolubricants containing Al2O3, graphene, and carbon nanotubes (CNTs) at different mass fractions in a refrigeration compressor was experimentally investigated. The required electrical power of the compressor was measured to determine the effect of the use of nanolubricants. Nanoparticles used in the preparation of nanolubricants were gradually added to the lubricant to determine the optimum nanoparticle mass fraction for each nanoparticle type. Thus, it was found that the compressor operated safely and efficiently with nanolubricants. Furthermore, the optimum mass fractions were determined to be 0.750% for Al2O3, 0.250% for graphene, and 0.250% for CNTs for operating conditions of this study. As a result, the required electrical power of the compressor decreased by 6.26, 6.82, and 5.55% with the addition of Al2O3, graphene, and CNT nanoparticles at optimum mass fractions of 0.750, 0.250, and 0.250% to the lubricant, respectively, compared to the compressor using pure oil. Moreover, density and dynamic viscosity of the nanolubricant samples used in the experiments were also measured, and their kinematic viscosity, which is an important parameter for lubricants, was calculated. It was determined that the kinematic viscosity continuously increased with increasing nanoparticle fraction. In conclusion, nanolubricants containing nanoparticles above the optimum mass fraction increase the required electrical power of the compressor. It is concluded that nanoparticle fractions should not be used above the optimum value in nanolubricant applications.","PeriodicalId":8802,"journal":{"name":"Beilstein Journal of Nanotechnology","volume":"14 ","pages":"1041-1058"},"PeriodicalIF":3.1,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10630681/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71520350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0