Resolution Electron Microscopy Research Articles

Optimal acceleration voltage for near-atomic resolution imaging of layer-stacked 2D polymer thin films

Despite superb instrumental resolution in modern transmission electron microscopes (TEM), high-resolution imaging of organic two-dimensional (2D) materials is a formidable task. Here, we present that the appropriate selection of the incident electron energy plays a crucial role in reducing the gap between achievable resolution in the image and the instrumental limit. Among a broad range of electron acceleration voltages (300 kV, 200 kV, 120 kV, and 80 kV) tested, we found that the highest resolution in the HRTEM image is achieved at 120 kV, which is 1.9 Å. In two imine-based 2D polymer thin films, unexpected molecular interstitial defects were unraveled. Their structural nature is identified with the aid of quantum mechanical calculations. Furthermore, the increased image resolution and enhanced image contrast at 120 kV enabled the detection of functional groups at the pore interfaces. The experimental setup has also been employed for an amorphous organic 2D material.

Cross-modality synthesis of EM time series and live fluorescence imaging

Analyses across imaging modalities allow the integration of complementary spatiotemporal information about brain development, structure, and function. However, systematic atlasing across modalities is limited by challenges to effective image alignment. We combine highly spatially resolved electron microscopy (EM) and highly temporally resolved time-lapse fluorescence microscopy (FM) to examine the emergence of a complex nervous system in Caenorhabditis elegans embryogenesis. We generate an EM time series at four classic developmental stages and create a landmark-based co-optimization algorithm for cross-modality image alignment, which handles developmental heterochrony among datasets to achieve accurate single-cell level alignment. Synthesis based on the EM series and time-lapse FM series carrying different cell-specific markers reveals critical dynamic behaviors across scales of identifiable individual cells in the emergence of the primary neuropil, the nerve ring, as well as a major sensory organ, the amphid. Our study paves the way for systematic cross-modality data synthesis in C. elegans and demonstrates a powerful approach that may be applied broadly.

Preparation and black-white electrochromic performance of the non-contact ZnO@NiO core-shell rod array

In this paper, the non-contact ZnO@NiO core-shell rod array films with black-white electrochromic performance were designed and constructed by electrochemical deposition method. The blank porous NiO films were also prepared for comparison. The morphology, component and microstructure of the films were characterized using X-ray diffractometer (XRD), scanning electron microscope (SEM) and high resolution transmission electron microscope (HRTEM). And their electrochromic (EC) performance was examined. The results show that the ZnO transition layer presents a hexagonal rod array nature, which is approximately perpendicular to the surface of substrate, thus, offered a three-dimensional frame for the growth of porous NiO. The ZnO@NiO film is composed of a large number of non-contact core-shell rods. The introduction of ZnO rod array transition layer not only led to the improvement of film/substrate connection but also resulted into the high EC performance including sharp black-white contrast, rapid switch speed and good stability. The heterojunction and P-N junction formed at the SnO2/ZnO/NiO interfaces might also play a role in the EC performance.

Aberration correction in electron microscopy

Abstract Spherical and chromatic aberrations limit the resolution of conventional electron microscopes. Both defects are unavoidable in the case of static rotationally symmetric electromagnetic fields (Scherzer theorem). To compensate for these aberrations, multipole correctors or electron mirrors are required .The correction of the resolution-limiting aberrations is demonstrated for the hexapole corrector, the quadrupole-octopole corrector, and the tetrode mirror. Electron mirrors require a magnetic beam separator, which must be free of second-order aberrations. The multipole correctors are highly symmetric telescopic systems compensating for the defects of the round lenses. The hexapole corrector has the simplest structure yet eliminates only third-order spherical aberration and coma, whereas the mirror and the quadrupole-octopole (QO) corrector are able to correct the chromatic aberration as well. The QO corrector eliminates chromatic aberration by means of crossed electric and magnetic quadrupoles and the third-order spherical aberration by octopoles. At present, aberration-corrected electron microscopes obtain a resolution limit of about 1 Å.

Preparation and electrochemical validation of rGO-TiO2-MoO3 ternary nanocomposite for efficient supercapacitor electrode

In this paper, rGO-TiO2-MoO3, an active electrode material is synthesized by simple hydrothermal method and validated for high performance supercapacitor application. The anatase phase of TiO2 and orthorhombic phase of MoO3are distributed on the surface of the graphene sheet, which is confirmed by few characterization techniques, namely, X-ray diffraction technique (XRD), micro-Raman, Field Emission-Scanning Electron Microscope (FE-SEM) and High Resolution–Transmission Electron Microscope (HR-TEM). Further, the chemical composition of the prepared material is elucidated by X-ray Photoelectron Spectroscopy (XPS). The electrochemical performance of the active material is estimated by Cyclic Voltammetry (CV) and Galvanostatic Charge-Discharge (GCD) studies. The specific capacitance value of the prepared composite is calculated to be 472 F/gat current density 1 A/g in 2 M Na2SO4 electrolyte solution. The coulomb efficiency and the capacitance retention of the rGO-TiO2-MoO3 composite are estimated to be 98% and 98.6% at current density 7 A/g, respectively.

An eco-benign synthesis of silver nanoparticles using Aegle marmelos L. bark extract and evaluation of their DNA cleavage, DNA binding, antioxidant and antibacterial activity

The present study demonstrates green chemistry assisted synthesis of silver nanoparticles (B-AgNPs) in aqueous medium employing bark extract of Aegle marmelos L., their characterization and biological applications. B-AgNPs were synthesized at 70 °C with 0.005 M AgNO3 was reduced with 5.0 mL of bark extract for 20 min and monitored with UV-Vis spectrum. The size, charge, stability, and polydispersity index of B-AgNPs were determined using dynamic light scattering (DLS) and zeta potential analysis. Scanning electron microscope and high resolution transmission electron microscopy images showed that spherical-shaped BAgNPs were formed with average size of 20 nm along with a hydrodynamic diameter ranging from 5 to 100 nm in two subpopulations as evaluated by DLS analysis. Fourier transmission infrared spectrum ascertain the functional groups and purity while energy dispersive X-ray spectroscopy study confirms the elemental composition of BAgNP. B-AgNPs remarkably exhibit DNA cleavage activity against pUC19 and binding activity with CT-DNA. The growth inhibition potential of BAgNPs against Staphylococcus aureus, Escherichia Coli, and Pseudomonas aeruginosa bacterial strains was tested and they exhibited minimum inhibitory concentration value 10 μM against E. coli lower than the plant extract. DPPH assay in different concentrations of BAgNPs revealed the antioxidant potential between 41.3% and 90.2%.

Ag-doped Bi2WO6/BiOI heterojunction used as photocatalyst for the enhanced degradation of tetracycline under visible-light and biodegradability improvement

A new Bi2WO6/BiOI/Ag heterojunction composite was fabricated by the deposition of Ag nanoparticles on Bi2WO6/BiOI via two-step hydrothermal process and characterized by X-ray diffraction (XRD), Fourier transform infrared spectrometer (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and high resolution transmission electron microscope (HRTEM) analyses. The photoelectric properties of the as-prepared composites were investigated by UV–vis diffuse reflectance spectrum (DRS), transient photocurrent response, electrochemical impedance spectroscopy (EIS) and photoluminescence spectrum (PLS). It was found that the amount of Ag in Bi2WO6/BiOI/Ag exhibited an evident influence on photoelectric properties and photocatalytic activity. Compared with the other as-prepared photocatalysts, Bi2WO6/BiOI/Ag-8 presented the highest photocatalytic activity for tetracycline degradation ascribed to the heterojunction structure and the surface plasmon resonance (SPR) action, which evidently enhanced the visible-light absorbance, and promoted the separation/transfer of photo-generated electron/hole (e–/h+) pairs. The organic intermediates formed during tetracycline photocatalytic degradation were identified and the degradation pathway was proposed. For the recommended photocatalyst, the hydroxyl radical (∙OH) and superoxide anion radical (∙O2–) produced by the Z-scheme photocatalytic mechanism with Ag as co-catalyst were responsible for the degradation. In addition, the photocatalytic degradation of tetracycline evidently reduced the solution toxicity and enhanced the biodegradability.

Ultrafast Transmission Electron Microscopy: Techniques and Applications

Abstract:With the growing applications of temporally resolved electron microscopy for probing basic phenomena and reducing beam-induced damage, a multifaceted introduction to the field of ultrafast transmission electron microscopy is provided. This primer includes techniques and equipment as well as implementation perspectives. Historical developments and recent technical advances will provide insight into ultrafast capabilities for research as well as educate electron microscopists on the general techniques. This technology review also includes applications enabled by ultrafast techniques using various sample stimuli from multidisciplinary fields.

Investigation of the Effect of Structural Properties of a Vertically Standing CNT Cold Cathode on Electron Beam Brightness and Resolution of Secondary Electron Images.

Carbon nanotube (CNT)-based cold cathodes are promising sources of field emission electrons for advanced electron devices, particularly for ultra-high-resolution imaging systems, due to their high brightness and low energy spread. While the electron field emission properties of single-tip CNT cathodes have been intensively studied in the last few decades, a systematic study of the influencing factors on the electron beam properties of CNT cold cathodes and the resolution of the secondary electron images has been overlooked in this field. Here, we have systematically investigated the effect of the structural properties of a CNT cold cathode on the electron beam properties and resolution of secondary electron microscope (SEM) images. The aspect ratio (geometric factor) and the diameter of the tip of a vertically standing CNT cold cathode significantly affect the electron beam properties, including the beam size and brightness, and consequently determine the resolution of the secondary electron images obtained by SEM systems equipped with a CNT cold cathode module. Theoretical simulation elucidated the dependence of the structural features of CNT cold cathodes and electron beam properties on the contribution of edge-emitted electrons to the total field emission current. Investigating the correlations between the structural properties of CNT cold cathodes, the properties of the emitted electron beams, and the resolution of the secondary electron images captured by SEM equipped with CNT cold cathode modules is highly important and informative as a basic model.

Toward Atomic-Resolution Quantum Measurements with Coherently Shaped Free Electrons.

Free electrons provide a powerful tool for probing material properties at atomic resolution. Recent advances in ultrafast electron microscopy enable the manipulation of free-electron wave functions using laser pulses. It would be of great importance if one could combine the spatial resolution of electron microscopes with the ability of laser pulses to probe coherent phenomena in quantum systems. To this end, we propose a novel concept that leverages free electrons that are coherently shaped by laser pulses to measure quantum coherence in materials. We develop the quantum theory of interactions between shaped electrons and arbitrary qubit states in materials, and show how the postinteraction electron energy spectrum enables measuring the qubit state (on the Bloch sphere) and the decoherence or relaxation times (T_{2}/T_{1}). Finally, we describe how such electrons can detect and quantify superradiance from multiple qubits. Our scheme can be implemented in ultrafast transmission electron microscopes (UTEM), opening the way toward the full characterization of the state of quantum systems at atomic resolution.

Effect of triethanolamine on the crystallization behavior and kinetics of nano t-ZrO2 synthesized by microwave-assisted hydrothermal method

The effect of mineralizer triethanolamine (TEOA) on crystallization behavior of nano-ZrO2 crystallites preparated by microwave-assisted hydrothermal was investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and high resolution TEM (HRTEM). The isothermal crystallization kinetics of nano-ZrO2 was studied, and the action mechanism of mineralizer TEOA was discussed. XRD and TEM results indicated that the product is a single tetragonal zirconia (t-ZrO2), and the particle size is 25–30 nm. The addition of mineralizer triethanolamine can significantly improve the nucleation rate and crystallization rate of nano-ZrO2. In order to obtain nano-ZrO2 crystallites with uniform size and good crystallinity, the concentration of TEOA should not be less than 0.3 mol/L (M). There is a good linear relationship between ln[-ln(1-Xc)] and lnt when the concentration of TEOA is 0.3 M, 0.4 M, 0.5 M, indicating that Avrami equation can well describe the crystallization process of nano-ZrO2 crystallites. The crystallization kinetics equations are described by ln[-ln(1-Xc)] = ln0.0005 + 2.25lnt, ln[-ln(1-Xc)] = ln0.025 + 1.28lnt, ln[-ln(1-Xc)] = ln0.4 + 0.57lnt, respectively. With the increase of the concentration of TEOA, the alkali separation of TEOA is carried out continuously, which aggravates the dissolution of colloid and makes the process of crystallization and nucleation easier. Meanwhile, alkoxide ammonium ion formed by alkali ionization can form an electric double layer structure on the surface of zirconia crystallites, thus promoting the dispersion of nano-zirconia powders.

Tripeptide based nontoxic hydrogelators as carrier of vitamin B12 and doxorubicin

Gelation performances of three synthesized short tripeptide based amphiphiles [11-(2-tert-Butoxycarbonylamino-3-methyl-butyrylamino)-undecanoylamino]-acetic acid TBMBUA (A), [11-(2-tert-Butoxycarbonylamino-3-methyl-pentanoylamino)-undecanoylamino]-acetic acid TBMPUA (B) and [11-(2-tert-Butoxycarbonylamino-3-phenyl-propionylamino)-undecanoylamino]-acetic acid TBPPUA (C) have been investigated. The results recommended that these can act as good hydrogelators. Various instrumental techniques like Field Emission Scanning Electron Microscopic (FE-SEM) and high resolution Transmission Electron Microscopic (HR-TEM) imaging for morphological analyses of hydrogel, X-ray Diffraction analyses to know packing pattern of gelators in the assembled state, Fourier Transformed Infrared Spectroscopic (FT-IR) measurements to execute role of hydrogen bonding in the gel morphology and rheological experiments for investigation of mechanical stability were carried out to characterize the hydrogels. Prepared hydrogels were employed for entrapment and release of Vitamin B12 and Doxorubicin, an anticancer drug molecule. The study revealed that the release capacity is dependent on pH of the medium. Synthesized hydrogelators (TBMBUA, TBMPUA and TBPPUA) showed anticancer activity by exhibiting in vitro cytotoxicity against the human breast cancer cell line (MCF-7 cell) as well as in-vivo cancer cell line (EAC cell) using MTT assay. The gelators did not exhibit any notable lethality towards normal human lymphocytes up to the concentration of 25 µg/ml. These results propose that the utilization of hydrogelators for localized breast cancer therapy may have a high therapeutic potential.

Development of highly active, chemically stable and recyclable magnetic nanophotocatalyst based on plasmonic silver nanoparticles and photosensitive trans‐3‐(trans‐4‐imidazolyl) acrylic acid molecules

This study relates to the preparation of a novel nanophotocatalyst comprising of plasmonic silver nanoparticle, photosensitive trans‐3‐(trans‐4‐imidazolyl) acrylic acid (T3TTIA) and superparamagnetic iron oxide nanoparticles (SPION). This heterogeneous nano‐photocatalyst has been synthesized via hydrothermal route where T3TTIA works as a capping agent and linker for SPION and plasmonic Ag NPs, respectively. Structural, morphological, thermal, magnetic, optical, and catalytic properties have been analyzed in detailed. The spinel cubic type structure of nanocrystals of SPION and silver has been confirmed by XRD analysis. XPS analysis has confirmed the presence of Ag0, Fe3O4, and integral functional group. The strong chemical interaction of localized surface plasmonic Ag nanoparticles and SPION with photosensitive T3TIAA molecule has been revealed by both the IR and XPS analysis. The shape of the final products has been observed as spherical with average particle size of 12 ±0.8 nm (with low degree of agglomeration) as analyzed by scanning electron microscope (SEM) and high resolution transmission electron microscope (HR‐TEM). The superparamagnetic nature and high thermal stability of the products have been revealed by vibrating sample magnetometry (VSM) and thermogravimetric (TG) analysis, respectively. UV‐visible spectrophotometry analysis has confirmed the maximum absorbance peak at ~420 nm, indicates as the characteristic peak of surface plasmon resonance (SPR) for silver nanoparticles with a band gap value of 1.43 eV. Furthermore, Brunauer−Emmett−Teller (BET) analysis has demonstrated mesoporous characteristic of the product which follows type IV isotherms with the average surface area and pore size as 250.492 m2/g and 6.1442 nm, respectively. The potential catalytic applications of the as‐prepared nanocatalysts have been explored for the decolorization of methyl orange (MO), methylene blue (MB), and photo‐reduction of 4‐nitrophenol (4‐NP) under both Visible and UV light irradiations. The catalytic activity of the as‐prepared nanocatalyst has been compared with the recent reported magnetic nano‐catalysts. The SPION@T3TIAA‐Ag nanocatalyst has shown excellent catalytic behavior toward the treatment of the selected industrial dyes and organic pollutant with recovery and reusability capacity up to seven cycles without losing significant catalytic efficiency.

Characterization of precipitates in aged Mg-4 wt%Zn alloy

The precipitation phases play a critical role in affecting the properties of age-hardenable Mg alloys. The structure and morphology of the intragranular and intergranular precipitates in aged Mg-4 wt%Zn alloy were investigated by using transmission electron microscope (TEM) and high resolution TEM (HRTEM). The peak hardness of 62 HV was obtained after the alloy was aged at 150 °C for 200 h. The precipitates were composed of a large amount of β1′ and very low amount of β2′ and β. The diameter and length of β1′ rods were in the range of 15−20 nm and over 1.3 μm, respectively. The structure of β1′ was hexagonal close-packed (HCP) MgZn2 instead of Mg7Zn4. The orientation relationship between β1′ and Mg matrix was 21¯1¯0β1'// 0002Mg and 0001β1'// 21¯1¯0Mg. The oval shaped precipitate with triclinic Mg3Zn2 structure appeared preferentially at the grain boundary. Its size and morphology did not show much difference with an increase in the aging time. The thin and long β1′ rods dominated the strengthening effect of Mg-Zn alloy.

Free-electron shaping using quantum light

Controlling the wave function of free electrons is important to improve the spatial resolution of electron microscopes, the efficiency of electron interaction with sample modes of interest, and our ability to probe ultrafast materials dynamics at the nanoscale. In this context, attosecond electron compression has been recently demonstrated through interaction with the near fields created by scattering of ultrashort laser pulses at nanostructures followed by free-electron propagation. Here, we show that control over electron pulse shaping, compression, and statistics can be improved by replacing coherent laser excitation by interaction with quantum light. We find that compression is accelerated for fixed optical intensity by using phase-squeezed light, while amplitude squeezing produces ultrashort double-pulse profiles. The generated electron pulses exhibit periodic revivals in complete analogy to the optical Talbot effect. We further reveal that the coherences created in a sample by interaction with the modulated electron are strongly dependent on the statistics of the modulating light, while the diagonal part of the sample density matrix reduces to a Poissonian distribution regardless of the type of light used to shape the electron. The present study opens a new direction toward the generation of free-electron pulses with additional control over duration, shape, and statistics, which directly affect their interaction with a sample.

Synthesis and characterization of SrFeO3-δ nanoparticles as antimicrobial agent

In this work, synthesis and characterization of SrFeO3-δ nanoparticles as antimicrobial agent are presented. Structural characterization of SrFeO3-δ sample shows that it has a cubic (Pm3m) phase with minor tetragonal phase. The morphology of the SrFeO3-δ nanoparticles sample was characterized by a field emission scanning electron microscope (FE-SEM) and high resolution transmission electron microscopy (HRTEM). Mossbauer spectroscopy and X-ray photoelectron spectroscopy (XPS) results showed that the iron exists in oxidation states Fe3+, Fe3.5+, and Fe4+. The SrFeO3-δ nanoparticles sample exhibits energy band gap (Eg = 1.75 eV) which lies in the Visible region. Thermal and magnetic studies provide an evidence for ferroelectricity and antiferromagnetic with small amount of ferromagnetic in SrFeO3-δ nanoparticles sample, respectively. SrFeO3-δ nanoparticles sample showing powerful activity to fight both of tested Gram-positive, Gram-negative bacteria, and fungi strains. The antimicrobial activity as well as the minimal inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) of the SrFeO3-δ nanoparticles sample have been investigated.

Characterizing interface structure between crystalline and ion bombarded silicon by transmission electron microscopy and molecular dynamics simulations

Application of ion beams in modern technology requires quantifying disorder induced by the collisions of energetic species and substrate atoms. For studying the structure of the transition region between crystalline silicon and amorphous layer Si(001) substrate was bombarded by gallium ions with the energy of 5 keV. The transition region width and amorphous layer thickness were evaluated using cross-correlation analysis of high- resolution electron microscopy (HRTEM) images taken from cross-section specimens. Performed molecular dynamics simulations allowed obtaining atom positions in amorphized material, which provided close agreement between the simulated and experimental HRTEM images. Analysis of calculated atomic arrangements realized by employing an introduced displacement order parameter enabled finding the interface transition region width and amorphous layer thickness which agreed satisfactorily with the values estimated from HRTEM images. This agreement gives evidence that MD simulation can be applied for reliable prediction and quantification of the disordered region extension in the ion bombarded material. The obtained amorphous layer thickness is also consistent with the results established utilizing the critical point defect density model applied to Monte Carlo simulations.

Evolution of microstructure and mechanical properties influenced by nanosized precipitates during rolling deformation

In this research work, the 6111Al reinforced by rare earth element Er was subjected to severe plastic deformation with different rolling reduction ranging from 50%, 70%–90% respectively. Continuous deepening of the dynamic recrystallization occurred during the increment on rolling deformation and the average size of α-Al grains decreased to 7.9 μm eventually. The nanosized Al3Er particles were characterized by the combined function of inhibiting and promoting the DRX at the same time during the rolling process. And the competitive relationship between the driving force and the restraining force has been studied via systematic calculation here. A noticeable enhancement on 6111Al–Er alloy has been obtained with YS, UTS and elongation increasing to 359 MPa, 380 MPa and 27.4% respectively when the rolling deformation reached to 90%, which was attributed to the synergistic strengthening effect induced by the fine grain strengthening and the Orowan strengthening mechanisms. The evolution of microstructure was characterized by the equipments including Electron backscattered diffraction (EBSD), Scanning electron microscope (SEM) and High resolution transmission electron microscope (HRTEM).

Mechanisms for Pd[sbnd]Au enrichment in porphyry-epithermal ores of the Elatsite deposit, Bulgaria

Porphyry Cu can contain significant concentrations of platinum-group elements (PGE: Os, Ir, Ru, Rh, Pt, Pd). In this study, we provide a comprehensive in situ analysis of noble metals (PGE, Au, Ag) for (CuFe)-rich sulfides from the Elatsite, one of the world's PGE-richest porphyry Cu deposits. These data, acquired using laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS), indicate that Pd was concentrated in all the (CuFe)-rich sulfides at ppm-levels, with higher values in pyrite (~6 ppm) formed at the latest epithermal stage (i.e., quartz–galena–sphalerite assemblage) than in bornite and chalcopyrite (<5 ppm) from the hypogene quartz–magnetite–bornite–chalcopyrite ores. Likewise, Au is significantly more concentrated in pyrite (~5 ppm) than in the (CuFe)-rich sulfides (≤0.08 ppm). In contrast, Ag reaches hundreds of ppm in pyrite and bornite (~240 ppm) but is in much lesser amounts in chalcopyrite (<25 ppm). The inspection of the time-resolved spectra collected during LA-IPC-MS analyses indicates that noble metals are present in the sulfides in two forms: (1) structurally bound (i.e., solid solution) in the lattice of sulfides and, (2) as nano- to micron-sized inclusions (PdTe and Au). These observations are further confirmed by careful investigations of the PGE-rich (CuFe)-rich sulfides by combining high-spatial resolution of field emission scanning electron microscope (FESEM) and focused ion beam and high-resolution transmission electron microscopy (FIB/HRTEM). A typical Pd-bearing mineral includes the composition PdTe2 close to the ideal merenskyite but with a distinct crystallographic structure, whereas Au is mainly found as native element. Our detailed mineralogical study coupled with previous knowledge on noble-metal inclusions in the studied ores reveals that noble metal enrichment in the Elatsite porphyry ores was mainly precipitated from droplets of Au-Pd-Ag telluride melt (s) entrained in the high-temperature hydrothermal fluid. These telluride melts could separate at the time of fluid unmixing from the silicate magma or already be present in the latter either derived from deep-seated crustal or mantle sources. Significant enrichment in Pd and Au (the latter correlated with As) in low-temperature pyrite is interpreted as remobilization of these noble metals from pre-existing hypogene ores during the epithermal overprinting.

Structural, electrical and magnetic properties of glucose-capped CdS nanoparticles

Abstract CdS nanoparticles are synthesized by a simple chemical coprecipitation technique using glucose as a capping/complexing agent and their structural, morphological, electrical and magnetic properties are studied. X-ray diffraction results reveal the pure phase formation of CdS nanoparticles along with a wurtzite structure. The interaction of the glucose with CdS nanoparticles is evident from the distinct absorption bands and peaks in the Fourier transform infrared spectra. Field effect scanning electron microscope and high resolution transmission electron microscope images depict weakly aggregated spherical nanoparticles of size ~2- 20 nm. The selective area electron diffraction pattern exhibits well-resolved diffraction rings representing the polycrystalline nature of the nanoparticles. The optical band gap has been calculated using Tauc’s plot and found to be 2.58 eV, which is higher than the band gap of the bulk phase wurtzite CdS. The existence of the excitonic peak and the blue-shift in the absorption threshold confirm the quantum confinement in the synthesized nanoparticles. The temperature dependence of d. c. conductivity is studied and observed a linear response through current-voltage characteristics. Weak ferromagnetism is also observed in the synthesized CdS nanoparticles irrespective of the diamagnetic nature of CdS in bulk form. The observation of weak ferromagnetism in the synthesized nanoparticles proposes them as a potential candidate for diluted magnetic semiconductors.